Tag Archives: java

[Solved] fragment error: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapplication/com.example.myapplication.MainActivity}…

1. Error Messages:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapplication/com.example.myapplication.MainActivity}: android.view.InflateException: Binary XML file line #9 in com.example.myapplication:layout/activity_main: Binary XML file line #9 in com.example.myapplication:layout/activity_main: Error inflating class fragment.
2. Locating the problem
Check the logs and find that the problem is located at: at com.example.myapplication.MainActivity.onCreate(MainActivity.java:11), click to jump to the line of code that says

  setContentView(R.layout.activity_main);

It was found that it was an XML file problem, so I carefully checked a piece of code I used fragment

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <fragment
        android:name="com.example.myapplication.fragment.MyFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

It was found that the problem was caused by the fact that the fragment did not use the layout ID. after I added the ID to the fragment, the problem was successfully solved.

 <fragment
        android:id="@+id/my_fragment"
        android:name="com.example.myapplication.fragment.MyFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

[Solved] Flink TableAPI Error — > Class cannot be found

Console error:

"C:\Program Files\Java\jdk1.8.0_201\bin\java.exe" "-javaagent:D:\ideaSoftware\IntelliJ IDEA 2020.2.3\lib\idea_rt.jar=52126:D:\ideaSoftware\IntelliJ IDEA 2020.2.3\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_201\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\rt.jar;D:\Conding_pojoect\MyFlink\target\classes;D:\MyTools\repository\org\apache\flink\flink-clients_2.12\1.9.3\flink-clients_2.12-1.9.3.jar;D:\MyTools\repository\org\apache\flink\flink-core\1.9.3\flink-core-1.9.3.jar;D:\MyTools\repository\org\apache\flink\flink-annotations\1.9.3\flink-annotations-1.9.3.jar;D:\MyTools\repository\org\apache\flink\flink-metrics-core\1.9.3\flink-metrics-core-1.9.3.jar;D:\MyTools\repository\org\apache\flink\flink-shaded-asm-6\6.2.1-7.0\flink-shaded-asm-6-6.2.1-7.0.jar;D:\MyTools\repository\org\apache\commons\commons-lang3\3.3.2\commons-lang3-3.3.2.jar;D:\MyTools\repository\com\esotericsoftware\kryo\kryo\2.24.0\kryo-2.24.0.jar;D:\MyTools\repository\com\esotericsoftware\minlog\minlog\1.2\minlog-1.2.jar;D:\MyTools\repository\org\objenesis\objenesis\2.1\objenesis-2.1.jar;D:\MyTools\repository\commons-collections\commons-collections\3.2.2\commons-collections-3.2.2.jar;D:\MyTools\repository\org\apache\commons\commons-compress\1.18\commons-compress-1.18.jar;D:\MyTools\repository\org\apache\flink\flink-runtime_2.12\1.9.3\flink-runtime_2.12-1.9.3.jar;D:\MyTools\repository\org\apache\flink\flink-queryable-state-client-java\1.9.3\flink-queryable-state-client-java-1.9.3.jar;D:\MyTools\repository\org\apache\flink\flink-hadoop-fs\1.9.3\flink-hadoop-fs-1.9.3.jar;D:\MyTools\repository\commons-io\commons-io\2.4\commons-io-2.4.jar;D:\MyTools\repository\org\apache\flink\flink-shaded-netty\4.1.32.Final-7.0\flink-shaded-netty-4.1.32.Final-7.0.jar;D:\MyTools\repository\org\apache\flink\flink-shaded-jackson\2.10.1-9.0\flink-shaded-jackson-2.10.1-9.0.jar;D:\MyTools\repository\org\javassist\javassist\3.19.0-GA\javassist-3.19.0-GA.jar;D:\MyTools\repository\org\scala-lang\scala-library\2.12.7\scala-library-2.12.7.jar;D:\MyTools\repository\com\typesafe\akka\akka-actor_2.12\2.5.21\akka-actor_2.12-2.5.21.jar;D:\MyTools\repository\com\typesafe\config\1.3.3\config-1.3.3.jar;D:\MyTools\repository\org\scala-lang\modules\scala-java8-compat_2.12\0.8.0\scala-java8-compat_2.12-0.8.0.jar;D:\MyTools\repository\com\typesafe\akka\akka-stream_2.12\2.5.21\akka-stream_2.12-2.5.21.jar;D:\MyTools\repository\org\reactivestreams\reactive-streams\1.0.2\reactive-streams-1.0.2.jar;D:\MyTools\repository\com\typesafe\ssl-config-core_2.12\0.3.7\ssl-config-core_2.12-0.3.7.jar;D:\MyTools\repository\org\scala-lang\modules\scala-parser-combinators_2.12\1.1.1\scala-parser-combinators_2.12-1.1.1.jar;D:\MyTools\repository\com\typesafe\akka\akka-protobuf_2.12\2.5.21\akka-protobuf_2.12-2.5.21.jar;D:\MyTools\repository\com\typesafe\akka\akka-slf4j_2.12\2.5.21\akka-slf4j_2.12-2.5.21.jar;D:\MyTools\repository\org\clapper\grizzled-slf4j_2.12\1.3.2\grizzled-slf4j_2.12-1.3.2.jar;D:\MyTools\repository\com\github\scopt\scopt_2.12\3.5.0\scopt_2.12-3.5.0.jar;D:\MyTools\repository\org\xerial\snappy\snappy-java\1.1.4\snappy-java-1.1.4.jar;D:\MyTools\repository\com\twitter\chill_2.12\0.7.6\chill_2.12-0.7.6.jar;D:\MyTools\repository\com\twitter\chill-java\0.7.6\chill-java-0.7.6.jar;D:\MyTools\repository\org\apache\flink\flink-optimizer_2.12\1.9.3\flink-optimizer_2.12-1.9.3.jar;D:\MyTools\repository\org\apache\flink\flink-java\1.9.3\flink-java-1.9.3.jar;D:\MyTools\repository\commons-cli\commons-cli\1.3.1\commons-cli-1.3.1.jar;D:\MyTools\repository\org\slf4j\slf4j-api\1.7.15\slf4j-api-1.7.15.jar;D:\MyTools\repository\com\google\code\findbugs\jsr305\1.3.9\jsr305-1.3.9.jar;D:\MyTools\repository\org\apache\flink\force-shading\1.9.3\force-shading-1.9.3.jar;D:\MyTools\repository\org\projectlombok\lombok\1.18.2\lombok-1.18.2.jar;D:\MyTools\repository\org\apache\flink\flink-streaming-java_2.12\1.9.3\flink-streaming-java_2.12-1.9.3.jar;D:\MyTools\repository\org\apache\flink\flink-shaded-guava\18.0-7.0\flink-shaded-guava-18.0-7.0.jar;D:\MyTools\repository\org\apache\commons\commons-math3\3.5\commons-math3-3.5.jar;D:\MyTools\repository\org\apache\bahir\flink-connector-redis_2.11\1.0\flink-connector-redis_2.11-1.0.jar;D:\MyTools\repository\org\apache\flink\flink-streaming-java_2.11\1.2.0\flink-streaming-java_2.11-1.2.0.jar;D:\MyTools\repository\org\apache\flink\flink-runtime_2.11\1.2.0\flink-runtime_2.11-1.2.0.jar;D:\MyTools\repository\org\apache\flink\flink-shaded-hadoop2\1.2.0\flink-shaded-hadoop2-1.2.0.jar;D:\MyTools\repository\org\tukaani\xz\1.0\xz-1.0.jar;D:\MyTools\repository\xmlenc\xmlenc\0.52\xmlenc-0.52.jar;D:\MyTools\repository\commons-codec\commons-codec\1.4\commons-codec-1.4.jar;D:\MyTools\repository\commons-net\commons-net\3.1\commons-net-3.1.jar;D:\MyTools\repository\javax\servlet\servlet-api\2.5\servlet-api-2.5.jar;D:\MyTools\repository\org\mortbay\jetty\jetty-util\6.1.26\jetty-util-6.1.26.jar;D:\MyTools\repository\com\sun\jersey\jersey-core\1.9\jersey-core-1.9.jar;D:\MyTools\repository\commons-el\commons-el\1.0\commons-el-1.0.jar;D:\MyTools\repository\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar;D:\MyTools\repository\com\jamesmurty\utils\java-xmlbuilder\0.4\java-xmlbuilder-0.4.jar;D:\MyTools\repository\commons-lang\commons-lang\2.6\commons-lang-2.6.jar;D:\MyTools\repository\commons-configuration\commons-configuration\1.7\commons-configuration-1.7.jar;D:\MyTools\repository\commons-digester\commons-digester\1.8.1\commons-digester-1.8.1.jar;D:\MyTools\repository\org\codehaus\jackson\jackson-core-asl\1.8.8\jackson-core-asl-1.8.8.jar;D:\MyTools\repository\org\codehaus\jackson\jackson-mapper-asl\1.8.8\jackson-mapper-asl-1.8.8.jar;D:\MyTools\repository\org\apache\avro\avro\1.7.7\avro-1.7.7.jar;D:\MyTools\repository\com\thoughtworks\paranamer\paranamer\2.3\paranamer-2.3.jar;D:\MyTools\repository\com\jcraft\jsch\0.1.42\jsch-0.1.42.jar;D:\MyTools\repository\commons-beanutils\commons-beanutils-bean-collections\1.8.3\commons-beanutils-bean-collections-1.8.3.jar;D:\MyTools\repository\commons-daemon\commons-daemon\1.0.13\commons-daemon-1.0.13.jar;D:\MyTools\repository\javax\xml\bind\jaxb-api\2.2.2\jaxb-api-2.2.2.jar;D:\MyTools\repository\javax\xml\stream\stax-api\1.0-2\stax-api-1.0-2.jar;D:\MyTools\repository\javax\activation\activation\1.1\activation-1.1.jar;D:\MyTools\repository\io\netty\netty-all\4.0.27.Final\netty-all-4.0.27.Final.jar;D:\MyTools\repository\com\data-artisans\flakka-actor_2.11\2.3-custom\flakka-actor_2.11-2.3-custom.jar;D:\MyTools\repository\com\data-artisans\flakka-remote_2.11\2.3-custom\flakka-remote_2.11-2.3-custom.jar;D:\MyTools\repository\io\netty\netty\3.8.0.Final\netty-3.8.0.Final.jar;D:\MyTools\repository\org\uncommons\maths\uncommons-maths\1.2.2a\uncommons-maths-1.2.2a.jar;D:\MyTools\repository\com\data-artisans\flakka-slf4j_2.11\2.3-custom\flakka-slf4j_2.11-2.3-custom.jar;D:\MyTools\repository\org\clapper\grizzled-slf4j_2.11\1.0.2\grizzled-slf4j_2.11-1.0.2.jar;D:\MyTools\repository\com\github\scopt\scopt_2.11\3.2.0\scopt_2.11-3.2.0.jar;D:\MyTools\repository\com\fasterxml\jackson\core\jackson-core\2.7.4\jackson-core-2.7.4.jar;D:\MyTools\repository\com\fasterxml\jackson\core\jackson-databind\2.7.4\jackson-databind-2.7.4.jar;D:\MyTools\repository\com\fasterxml\jackson\core\jackson-annotations\2.7.0\jackson-annotations-2.7.0.jar;D:\MyTools\repository\org\apache\zookeeper\zookeeper\3.4.6\zookeeper-3.4.6.jar;D:\MyTools\repository\org\slf4j\slf4j-log4j12\1.6.1\slf4j-log4j12-1.6.1.jar;D:\MyTools\repository\log4j\log4j\1.2.16\log4j-1.2.16.jar;D:\MyTools\repository\jline\jline\0.9.94\jline-0.9.94.jar;D:\MyTools\repository\junit\junit\3.8.1\junit-3.8.1.jar;D:\MyTools\repository\com\twitter\chill_2.11\0.7.4\chill_2.11-0.7.4.jar;D:\MyTools\repository\org\apache\flink\flink-clients_2.11\1.2.0\flink-clients_2.11-1.2.0.jar;D:\MyTools\repository\org\apache\flink\flink-optimizer_2.11\1.2.0\flink-optimizer_2.11-1.2.0.jar;D:\MyTools\repository\org\apache\sling\org.apache.sling.commons.json\2.0.6\org.apache.sling.commons.json-2.0.6.jar;D:\MyTools\repository\redis\clients\jedis\2.8.0\jedis-2.8.0.jar;D:\MyTools\repository\org\apache\commons\commons-pool2\2.3\commons-pool2-2.3.jar;D:\MyTools\repository\org\apache\flink\flink-statebackend-rocksdb_2.12\1.10.1\flink-statebackend-rocksdb_2.12-1.10.1.jar;D:\MyTools\repository\com\data-artisans\frocksdbjni\5.17.2-artisans-2.0\frocksdbjni-5.17.2-artisans-2.0.jar;D:\MyTools\repository\mysql\mysql-connector-java\8.0.25\mysql-connector-java-8.0.25.jar;D:\MyTools\repository\com\google\protobuf\protobuf-java\3.11.4\protobuf-java-3.11.4.jar;D:\MyTools\repository\org\apache\flink\flink-table-planner_2.12\1.10.1\flink-table-planner_2.12-1.10.1.jar;D:\MyTools\repository\org\apache\flink\flink-table-common\1.10.1\flink-table-common-1.10.1.jar;D:\MyTools\repository\org\apache\flink\flink-shaded-asm-7\7.1-9.0\flink-shaded-asm-7-7.1-9.0.jar;D:\MyTools\repository\org\apache\flink\flink-table-api-java-bridge_2.12\1.10.1\flink-table-api-java-bridge_2.12-1.10.1.jar;D:\MyTools\repository\org\apache\flink\flink-table-api-scala-bridge_2.12\1.10.1\flink-table-api-scala-bridge_2.12-1.10.1.jar;D:\MyTools\repository\org\apache\flink\flink-scala_2.12\1.10.1\flink-scala_2.12-1.10.1.jar;D:\MyTools\repository\org\apache\flink\flink-streaming-scala_2.12\1.10.1\flink-streaming-scala_2.12-1.10.1.jar;D:\MyTools\repository\org\apache\flink\flink-table-planner-blink_2.12\1.10.1\flink-table-planner-blink_2.12-1.10.1.jar;D:\MyTools\repository\org\apache\flink\flink-table-api-java\1.10.1\flink-table-api-java-1.10.1.jar;D:\MyTools\repository\org\apache\flink\flink-table-api-scala_2.12\1.10.1\flink-table-api-scala_2.12-1.10.1.jar;D:\MyTools\repository\org\scala-lang\scala-reflect\2.12.7\scala-reflect-2.12.7.jar;D:\MyTools\repository\org\scala-lang\scala-compiler\2.12.7\scala-compiler-2.12.7.jar;D:\MyTools\repository\org\scala-lang\modules\scala-xml_2.12\1.0.6\scala-xml_2.12-1.0.6.jar;D:\MyTools\repository\org\apache\flink\flink-table-runtime-blink_2.12\1.10.1\flink-table-runtime-blink_2.12-1.10.1.jar;D:\MyTools\repository\org\codehaus\janino\janino\3.0.9\janino-3.0.9.jar;D:\MyTools\repository\org\codehaus\janino\commons-compiler\3.0.9\commons-compiler-3.0.9.jar;D:\MyTools\repository\org\apache\calcite\avatica\avatica-core\1.15.0\avatica-core-1.15.0.jar;D:\MyTools\repository\org\reflections\reflections\0.9.10\reflections-0.9.10.jar" Com.ZQQQ.TableAPI.Example
21:39:36,292 INFO  org.apache.flink.api.java.typeutils.TypeExtractor             - class org.apache.flink.streaming.api.functions.source.TimestampedFileInputSplit does not contain a setter for field modificationTime
21:39:36,293 INFO  org.apache.flink.api.java.typeutils.TypeExtractor             - Class class org.apache.flink.streaming.api.functions.source.TimestampedFileInputSplit cannot be used as a POJO type because not all fields are valid POJO fields, and must be processed as GenericType. Please read the Flink documentation on "Data Types & Serialization" for details of the effect on performance.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/flink/configuration/ReadableConfig
	at org.apache.flink.table.planner.StreamPlannerFactory.create(StreamPlannerFactory.java:49)
	at org.apache.flink.table.api.java.internal.StreamTableEnvironmentImpl.create(StreamTableEnvironmentImpl.java:120)
	at org.apache.flink.table.api.java.StreamTableEnvironment.create(StreamTableEnvironment.java:112)
	at org.apache.flink.table.api.java.StreamTableEnvironment.create(StreamTableEnvironment.java:83)
	at Com.ZQQQ.TableAPI.Example.main(Example.java:35)
Caused by: java.lang.ClassNotFoundException: org.apache.flink.configuration.ReadableConfig
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 5 more

Process finished with exit code 1

Reason for the error.
It is caused by the inconsistency between the Flink version and the tableAPI version.
Solution.
Change all the pom.xml that involve flink version to the same version.

I configure the pom.xml file as follows

  <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-streaming-java -->
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-streaming-java_2.12</artifactId>
        <version>1.10.1</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.bahir/flink-connector-redis -->
    <dependency>
        <groupId>org.apache.bahir</groupId>
        <artifactId>flink-connector-redis_2.11</artifactId>
        <version>1.0</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-statebackend-rocksdb -->
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-statebackend-rocksdb_2.12</artifactId>
        <version>1.10.1</version>
    </dependency>
	
        <!--TableAPI-->
    <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-table-planner -->
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-table-planner_2.12</artifactId>
        <version>1.10.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-table-planner-blink_2.12</artifactId>
        <version>1.10.1</version>
    </dependency>

[Solved] Maven Multi-Project Compile Error: The POM for xxx is invalid

Reference address: the POM for XXX is invalid

Compilation warning:

[WARNING] The POM for com.gtcom:output-common:jar:1.0.0-SNAPSHOT is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details

Solution:

If there is no remote warehouse, select install on the parent project. If there is a remote warehouse, select deploy on the parent project.

Error message:

D:\Java\jdk-11.0.13\bin\java.exe -Dmaven.multiModuleProjectDirectory=D:\IdeaProjects\gtcom-output\output-backstage "-Dmaven.home=D:\JetBrains\IntelliJ IDEA 2021.3\plugins\maven\lib\maven3" "-Dclassworlds.conf=D:\JetBrains\IntelliJ IDEA 2021.3\plugins\maven\lib\maven3\bin\m2.conf" "-Dmaven.ext.class.path=D:\JetBrains\IntelliJ IDEA 2021.3\plugins\maven\lib\maven-event-listener.jar" "-javaagent:D:\JetBrains\IntelliJ IDEA 2021.3\lib\idea_rt.jar=61663:D:\JetBrains\IntelliJ IDEA 2021.3\bin" -Dfile.encoding=UTF-8 -classpath "D:\JetBrains\IntelliJ IDEA 2021.3\plugins\maven\lib\maven3\boot\plexus-classworlds-2.6.0.jar;D:\JetBrains\IntelliJ IDEA 2021.3\plugins\maven\lib\maven3\boot\plexus-classworlds.license" org.codehaus.classworlds.Launcher -Didea.version=2021.3 -DskipTests=true compile
[INFO] Scanning for projects...
[INFO] 
[INFO] ---------------------< com.gtcom:output-backstage >---------------------
[INFO] Building output-backstage 1.0.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[WARNING] The POM for com.gtcom:output-common:jar:1.0.0-SNAPSHOT is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ output-backstage ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO] Copying 4 resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ output-backstage ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 56 source files to D:\IdeaProjects\gtcom-output\output-backstage\target\classes
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.074 s
[INFO] Finished at: 2022-01-20T19:57:55+08:00
[INFO] ------------------------------------------------------------------------
---------------------------------------------------
constituent[0]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/conf/logging/
constituent[1]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/cdi-api-1.0.jar
constituent[2]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/commons-cli-1.4.jar
constituent[3]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/commons-io-2.5.jar
constituent[4]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/commons-lang3-3.8.1.jar
constituent[5]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/guava-25.1-android.jar
constituent[6]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/guice-4.2.1-no_aop.jar
constituent[7]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/jansi-1.17.1.jar
constituent[8]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/javax.inject-1.jar
constituent[9]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/jcl-over-slf4j-1.7.29.jar
constituent[10]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/jsoup-1.12.1.jar
constituent[11]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/jsr250-api-1.0.jar
constituent[12]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-artifact-3.8.1.jar
constituent[13]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-builder-support-3.8.1.jar
constituent[14]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-compat-3.8.1.jar
constituent[15]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-core-3.8.1.jar
constituent[16]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-embedder-3.8.1.jar
constituent[17]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-model-3.8.1.jar
constituent[18]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-model-builder-3.8.1.jar
constituent[19]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-plugin-api-3.8.1.jar
constituent[20]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-repository-metadata-3.8.1.jar
constituent[21]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-resolver-api-1.6.2.jar
constituent[22]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-resolver-connector-basic-1.6.2.jar
constituent[23]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-resolver-impl-1.6.2.jar
constituent[24]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-resolver-provider-3.8.1.jar
constituent[25]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-resolver-spi-1.6.2.jar
constituent[26]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-resolver-transport-wagon-1.6.2.jar
constituent[27]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-resolver-util-1.6.2.jar
constituent[28]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-settings-3.8.1.jar
constituent[29]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-settings-builder-3.8.1.jar
constituent[30]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-shared-utils-3.2.1.jar
constituent[31]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/maven-slf4j-provider-3.8.1.jar
constituent[32]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/org.eclipse.sisu.inject-0.3.4.jar
constituent[33]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/org.eclipse.sisu.plexus-0.3.4.jar
constituent[34]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/plexus-cipher-1.7.jar
constituent[35]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/plexus-component-annotations-2.1.0.jar
constituent[36]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/plexus-interpolation-1.25.jar
constituent[37]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/plexus-sec-dispatcher-1.4.jar
constituent[38]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/plexus-utils-3.2.1.jar
constituent[39]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/slf4j-api-1.7.29.jar
constituent[40]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/wagon-file-3.4.3.jar
constituent[41]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/wagon-http-3.4.3-shaded.jar
constituent[42]: file:/D:/JetBrains/IntelliJ%20IDEA%202021.3/plugins/maven/lib/maven3/lib/wagon-provider-api-3.4.3.jar
---------------------------------------------------
Exception in thread "main" java.lang.AssertionError
	at jdk.compiler/com.sun.tools.javac.util.Assert.error(Assert.java:155)
	at jdk.compiler/com.sun.tools.javac.util.Assert.check(Assert.java:46)
	at jdk.compiler/com.sun.tools.javac.comp.Modules.enter(Modules.java:247)
	at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.readSourceFile(JavaCompiler.java:837)
	at jdk.compiler/com.sun.tools.javac.processing.JavacProcessingEnvironment$ImplicitCompleter.complete(JavacProcessingEnvironment.java:1535)
	at jdk.compiler/com.sun.tools.javac.code.Symbol.complete(Symbol.java:642)
	at jdk.compiler/com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1326)
	at jdk.compiler/com.sun.tools.javac.code.Type$ClassType.complete(Type.java:1140)
	at jdk.compiler/com.sun.tools.javac.code.Type$ClassType.getTypeArguments(Type.java:1066)
	at jdk.compiler/com.sun.tools.javac.code.Printer.visitClassType(Printer.java:237)
	at jdk.compiler/com.sun.tools.javac.code.Printer.visitClassType(Printer.java:52)
	at jdk.compiler/com.sun.tools.javac.code.Type$ClassType.accept(Type.java:993)
	at jdk.compiler/com.sun.tools.javac.code.Printer.visit(Printer.java:136)
	at jdk.compiler/com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArgument(AbstractDiagnosticFormatter.java:199)
	at jdk.compiler/com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArguments(AbstractDiagnosticFormatter.java:167)
	at jdk.compiler/com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage(BasicDiagnosticFormatter.java:111)
	at jdk.compiler/com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage(BasicDiagnosticFormatter.java:67)
	at jdk.compiler/com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArgument(AbstractDiagnosticFormatter.java:185)
	at jdk.compiler/com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArguments(AbstractDiagnosticFormatter.java:167)
	at jdk.compiler/com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage(BasicDiagnosticFormatter.java:111)
	at jdk.compiler/com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage(BasicDiagnosticFormatter.java:67)
	at jdk.compiler/com.sun.tools.javac.util.JCDiagnostic.getMessage(JCDiagnostic.java:788)
	at jdk.compiler/com.sun.tools.javac.api.ClientCodeWrapper$DiagnosticSourceUnwrapper.getMessage(ClientCodeWrapper.java:799)
	at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess(JavaxToolsCompiler.java:149)
	at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile(JavacCompiler.java:169)
	at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:785)
	at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:129)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
	at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:957)
	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:289)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:193)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347)
	at org.codehaus.classworlds.Launcher.main(Launcher.java:47)

The process has ended, exit code 1

Spring Error: Transaction synchronization is not active

First, make sure that the @Transactional annotation is added to the calling method
1. Add the @Transactional annotation where transaction management is required. The @Transactional annotation can be applied to interface definitions and interface methods, class definitions and public methods of classes.
2. @Transactional annotations can only be applied to public visibility methods. If you use the @Transactional annotation on a protected, private, or package-visible method, it will not report an error, but the annotated method will not display the configured transaction settings.
3. Note that the mere presence of the @Transactional annotation is not sufficient to enable transactional behavior, it is only a metadata. You must use the configuration element in the configuration file to actually enable the transaction behavior. (spring configuration file, turn on declarative transactions)
The value of the “proxy-target-class” attribute of the element controls whether interface-based or class-based proxies are created. If the “proxy-target-class” property is set to “true”, then the class-based proxy will work (this requires the CGLIB library cglib.jar in the CLASSPATH). If the “proxy-target-class” property is set to “false” or if this property is omitted, then the standard JDK interface-based proxy will work.
5. The Spring team recommends using @Transactional annotations on specific classes (or methods of classes) and not on any interfaces that the class is intended to implement. Using @Transactional annotations on interfaces will only work if you set up an interface-based proxy. Because annotations are not inheritable, this means that if a class-based proxy is being used, then the transaction settings will not be recognized by the class-based proxy and the object will not be wrapped by the transaction proxy.
6. @Transactional transactions are opened, either by interface-based or class-based proxies are created. So in the same class a non-transactional method calls another transactional method, the transaction will not work.
Pay special attention to point 6: a non-transactional method in the same class calls another transactional method, the transaction will not work. This point caught my attention, maybe my annotated @Transactional departingCar method is also called by another method in the class that does not open a transaction, if this is true, everything makes sense.

Springboot2.6.X configurate swagger error [How to Solve] 

org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181)
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54)
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356)
	at java.lang.Iterable.forEach(Iterable.java:75)

Modify YML file

spring:
  mvc:
    pathmatch:
      matching-strategy: ant_path_matcher

[Solved] Springboot Project Error: Mail server connection failed;

 

Error background

Using springboot2 Error in 2.0 integrated mail function

Error message:

org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 587;nested exception is:
	javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?. Failed messages: javax.mail.MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 587;nested exception is:
	javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
; message exception details (1) are:Failed message 1:
javax.mail.MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 587;
  nested exception is:

Solution:

Modify the configuration file (in the context of using QQ mailbox)

spring:
  mail:
    host: smtp.qq.com
    port: 587
    username: e-mail
    password: Authorization Code
    default-encoding: UTF-8
    properties:
      mail:
        smtp:
          socketFactory:
            class: javax.net.ssl.SSLSocketFactory

result

After modifying the configuration, the problem is solved!

[Solved] Tomcat configurate HTTPS error: java.net.SocketException: Permission denied

Tomcat configuration HTTPS error Java net. SocketException: Permission denied

1. Error message

Today, when configuring HTTPS certificate for tomcat, an error was reported when starting Tomcat:

25-Jan-2022 22:01:59.398 SEVERE [main] org.apache.catalina.core.StandardService.initInternal Failed to initialize connector [Connector[HTTP/1.1-443]]
        org.apache.catalina.LifecycleException: Protocol handler initialization failed
                at org.apache.catalina.connector.Connector.initInternal(Connector.java:1060)
                at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:136)
                at org.apache.catalina.core.StandardService.initInternal(StandardService.java:552)
                at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:136)
                at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:848)
                at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:136)
                at org.apache.catalina.startup.Catalina.load(Catalina.java:639)
                at org.apache.catalina.startup.Catalina.load(Catalina.java:662)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.lang.reflect.Method.invoke(Method.java:498)
                at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:303)
                at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:473)
        Caused by: java.net.SocketException: Permission denied
                at sun.nio.ch.Net.bind0(Native Method)
                at sun.nio.ch.Net.bind(Net.java:438)
                at sun.nio.ch.Net.bind(Net.java:430)
                at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:225)
                at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
                at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:221)
                at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:1118)
                at org.apache.tomcat.util.net.AbstractJsseEndpoint.init(AbstractJsseEndpoint.java:223)
                at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:587)
                at org.apache.coyote.http11.AbstractHttp11Protocol.init(AbstractHttp11Protocol.java:74)
                at org.apache.catalina.connector.Connector.initInternal(Connector.java:1058)
                ... 13 more

The reason for the error is: java.net.Socketexception: permission denied , which is obviously a network permission problem. The reason for this problem is that the Linux operating system does not allow non root users to use ports less than 1024.

2. Solutions

1. Use the root account to start Tomcat
2. Change the port number to a port number greater than 1024, but add the port number to the URL request
3. Change the port number to a port number greater than 1024, and use iptables to forward port 443 to the configured port. The command is as follows:

#Execute the commands under the root
# Mapping port 443 to 8443
iptables -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-port 8443

[Solved] IDEA error: sun.security.pkcs not found

Abnormal scene

When Java 8 switches to Java 11, there is an error and sun is not found security 。

Problem analysis

Jar package and source code are available. The probability is due to the security policy in the new JDK.

Solution:

In the compiler’s settings -> Build,Execution -> Compiler-> Disable in Java compiler:

Use ‘–release’ option for cross-compilation

Then rebuild

If there is no exception after build, check it again.

[Solved] Jenkins error: Asynchronous execution failure

The job normally builds success, and then reports asynchronous execution failure, as shown below

[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 45.983 s
[INFO] Finished at: 2022-01-12T09:56:29+08:00
[INFO] ------------------------------------------------------------------------
ERROR: Asynchronous execution failure
java.util.concurrent.ExecutionException: java.lang.NullPointerException
	at hudson.remoting.Channel$2.adapt(Channel.java:1037)
	at hudson.remoting.Channel$2.adapt(Channel.java:1031)
	at hudson.remoting.FutureAdapter.get(FutureAdapter.java:60)
	at hudson.maven.AbstractMavenBuilder.waitForAsynchronousExecutions(AbstractMavenBuilder.java:186)
	at hudson.maven.Maven3Builder.call(Maven3Builder.java:144)
	at hudson.maven.Maven3Builder.call(Maven3Builder.java:70)
	at hudson.remoting.UserRequest.perform(UserRequest.java:211)
	at hudson.remoting.UserRequest.perform(UserRequest.java:54)
	at hudson.remoting.Request$2.run(Request.java:376)
	at hudson.remoting.InterceptingExecutorService.lambda$wrap$0(InterceptingExecutorService.java:78)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
ERROR: Asynchronous execution failure
java.util.concurrent.ExecutionException: java.lang.NullPointerException
	at hudson.remoting.Channel$2.adapt(Channel.java:1037)
	at hudson.remoting.Channel$2.adapt(Channel.java:1031)
	at hudson.remoting.FutureAdapter.get(FutureAdapter.java:60)
	at hudson.maven.AbstractMavenBuilder.waitForAsynchronousExecutions(AbstractMavenBuilder.java:186)
	at hudson.maven.Maven3Builder.call(Maven3Builder.java:144)
	at hudson.maven.Maven3Builder.call(Maven3Builder.java:70)
	at hudson.remoting.UserRequest.perform(UserRequest.java:211)
	at hudson.remoting.UserRequest.perform(UserRequest.java:54)
	at hudson.remoting.Request$2.run(Request.java:376)
	at hudson.remoting.InterceptingExecutorService.lambda$wrap$0(InterceptingExecutorService.java:78)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

Solution: find the fingerprints folder in Jenkins’s home directory, delete the contents, and then build without reporting an error.

[Solved] SpringBoot+Dubbo Startup Error: Fail to start server(url: dubbo://192.168.0.9:20880/service

When using springboot + Dubbo, an error is reported when starting the project

All error messages are as follows:


org.apache.dubbo.rpc.RpcException: Fail to start server(url: dubbo://192.168.0.9:20880/service.UserInfoService?anyhost=true&application=user-login-service&bind.ip=192.168.0.9&bind.port=20880&channel.readonly.sent=true&codec=dubbo&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&heartbeat=60000&interface=service.UserInfoService&metadata-type=remote&methods=selectUesers,deleteUser,registerUser,updateUser,selectUser,findAllUsers&pid=83072&qos.accept.foreign.ip=false&qos.enable=false&release=2.7.8&side=provider&timestamp=1641785798014) Failed to bind NettyServer on /192.168.0.9:20880, cause: Address already in use: bind
	at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.createServer(DubboProtocol.java:348) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.openServer(DubboProtocol.java:320) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.export(DubboProtocol.java:303) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:64) ~[dubbo-rpc-api-2.7.8.jar:2.7.8]
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:155) ~[dubbo-rpc-api-2.7.8.jar:2.7.8]
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:66) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java) ~[dubbo-common-2.7.8.jar:2.7.8]
	at org.apache.dubbo.registry.integration.RegistryProtocol.lambda$doLocalExport$2(RegistryProtocol.java:255) ~[dubbo-registry-api-2.7.8.jar:2.7.8]
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_302]
	at org.apache.dubbo.registry.integration.RegistryProtocol.doLocalExport(RegistryProtocol.java:253) ~[dubbo-registry-api-2.7.8.jar:2.7.8]
	at org.apache.dubbo.registry.integration.RegistryProtocol.export(RegistryProtocol.java:205) ~[dubbo-registry-api-2.7.8.jar:2.7.8]
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:62) ~[dubbo-rpc-api-2.7.8.jar:2.7.8]
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:153) ~[dubbo-rpc-api-2.7.8.jar:2.7.8]
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:64) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java) ~[dubbo-common-2.7.8.jar:2.7.8]
	at org.apache.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:492) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:325) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:300) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:206) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.lambda$exportServices$15(DubboBootstrap.java:1103) ~[dubbo-2.7.8.jar:2.7.8]
	at java.util.HashMap$Values.forEach(HashMap.java:981) ~[na:1.8.0_302]
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.exportServices(DubboBootstrap.java:1090) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.start(DubboBootstrap.java:901) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.config.spring.context.DubboBootstrapApplicationListener.onContextRefreshedEvent(DubboBootstrapApplicationListener.java:59) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.config.spring.context.DubboBootstrapApplicationListener.onApplicationContextEvent(DubboBootstrapApplicationListener.java:52) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.config.spring.context.OneTimeExecutionApplicationContextEventListener.onApplicationEvent(OneTimeExecutionApplicationContextEventListener.java:40) ~[dubbo-2.7.8.jar:2.7.8]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:938) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:412) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290) [spring-boot-2.6.2.jar:2.6.2]
	at com.clc.userlogin7000.demo.UserLoginApplication.main(UserLoginApplication.java:12) [classes/:na]
Caused by: org.apache.dubbo.remoting.RemotingException: Failed to bind NettyServer on /192.168.0.9:20880, cause: Address already in use: bind
	at org.apache.dubbo.remoting.transport.AbstractServer.<init>(AbstractServer.java:77) ~[dubbo-remoting-api-2.7.8.jar:2.7.8]
	at org.apache.dubbo.remoting.transport.netty4.NettyServer.<init>(NettyServer.java:77) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.remoting.transport.netty4.NettyTransporter.bind(NettyTransporter.java:35) ~[dubbo-2.7.8.jar:2.7.8]
	at org.apache.dubbo.remoting.Transporter$Adaptive.bind(Transporter$Adaptive.java) ~[dubbo-common-2.7.8.jar:2.7.8]
	at org.apache.dubbo.remoting.Transporters.bind(Transporters.java:56) ~[dubbo-remoting-api-2.7.8.jar:2.7.8]
	at org.apache.dubbo.remoting.exchange.support.header.HeaderExchanger.bind(HeaderExchanger.java:44) ~[dubbo-remoting-api-2.7.8.jar:2.7.8]
	at org.apache.dubbo.remoting.exchange.Exchangers.bind(Exchangers.java:70) ~[dubbo-remoting-api-2.7.8.jar:2.7.8]
	at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.createServer(DubboProtocol.java:346) ~[dubbo-2.7.8.jar:2.7.8]
	... 39 common frames omitted
Caused by: java.net.BindException: Address already in use: bind
	at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_302]
	at sun.nio.ch.Net.bind(Net.java:463) ~[na:1.8.0_302]
	at sun.nio.ch.Net.bind(Net.java:455) ~[na:1.8.0_302]
	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:233) ~[na:1.8.0_302]
	at io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:134) ~[netty-transport-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:562) ~[netty-transport-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1334) ~[netty-transport-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:506) ~[netty-transport-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:491) ~[netty-transport-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:973) ~[netty-transport-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:260) ~[netty-transport-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:356) ~[netty-transport-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) ~[netty-common-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469) ~[netty-common-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:503) ~[netty-transport-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) ~[netty-common-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.72.Final.jar:4.1.72.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.72.Final.jar:4.1.72.Final]
	at java.lang.Thread.run(Thread.java:853) ~[na:1.8.0_302]

See the error message from top to bottom

  1. 1. com.alibaba.dubbo.rpc.RpcException: Fail to start server service failed to start2. Caused by: com.alibaba.dubbo.remoting.RemotingException: Failed to bind NettyServer on /192.168.194.1:20880, cause: Failed to bind to: /0.0.0.0:20880 Failed to bind to port 20880 of this machine

    3. Caused by: org.jboss.netty.channel.ChannelException: Failed to bind to: /0.0.0.0:20880 Attempt to bind the service to port 20880 of this machine failed

    4. Caused by: java.net.BindException: Address already in use: The bind address has already been used

Solution:

application.yaml or application.properties configuration file port from 20880 to 20881 can be modified because I have configured 20880 in other modules, so here again configuration will report a duplicate binding exception ~ ~

[Solved] springboot Error: Error creating bean with name ‘configurationPropertiesBeans‘ defined in class path

springboot Error: Error creating bean with name ‘configurationPropertiesBeans’ defined in class path resource [org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]

Problem Background
1. using springboot framework type, the introduction of the springcloud dependency, version incompatibility leads to errors can not find the bean

2022-01-07 14:21:40.321  WARN [,,,] 67024 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'configurationPropertiesBeans' defined in class path resource [org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
2022-01-07 14:21:40.329  INFO [,,,] 67024 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-01-07 14:21:40.361 ERROR [,,,] 67024 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'configurationPropertiesBeans' defined in class path resource [org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:597) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:270) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:762) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:567) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:412) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:164) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:212) [spring-cloud-context-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:117) [spring-cloud-context-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:74) [spring-cloud-context-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) [spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) [spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) [spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131) [spring-context-5.3.14.jar:5.3.14]
	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66) [spring-boot-2.6.2.jar:2.6.2]
	at java.util.ArrayList.forEach(ArrayList.java:1257) ~[na:1.8.0_172]
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:338) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:296) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290) ~[spring-boot-2.6.2.jar:2.6.2]
	at com.yg.server1.Server1Application.main(Server1Application.java:10) ~[classes/:na]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481) ~[spring-core-5.3.14.jar:5.3.14]
	at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321) ~[spring-core-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.buildLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:232) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.findLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:210) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(InitDestroyAnnotationBeanPostProcessor.java:149) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:305) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1116) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.3.14.jar:5.3.14]
	... 30 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata
	at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_172]
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_172]
	at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_172]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.3.14.jar:5.3.14]
	... 37 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_172]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_172]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_172]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_172]
	... 41 common frames omitted

2022-01-07 14:21:40.366 ERROR [,,,] 67024 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'configurationPropertiesBeans' defined in class path resource [org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:597) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:270) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:762) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:567) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:412) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:164) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:212) ~[spring-cloud-context-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:117) ~[spring-cloud-context-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:74) ~[spring-cloud-context-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66) ~[spring-boot-2.6.2.jar:2.6.2]
	at java.util.ArrayList.forEach(ArrayList.java:1257) ~[na:1.8.0_172]
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65) ~[spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:338) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:296) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) [spring-boot-2.6.2.jar:2.6.2]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290) [spring-boot-2.6.2.jar:2.6.2]
	at com.yg.server1.Server1Application.main(Server1Application.java:10) [classes/:na]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481) ~[spring-core-5.3.14.jar:5.3.14]
	at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321) ~[spring-core-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.buildLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:232) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.findLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:210) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(InitDestroyAnnotationBeanPostProcessor.java:149) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:305) ~[spring-context-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1116) ~[spring-beans-5.3.14.jar:5.3.14]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.3.14.jar:5.3.14]
	... 30 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata
	at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_172]
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_172]
	at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_172]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.3.14.jar:5.3.14]
	... 37 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_172]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_172]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_172]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_172]
	... 41 common frames omitted


Process finished with exit code 1

Wrong POM file:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.yg</groupId>
    <artifactId>zipkinServer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <modules>
        <module>server1</module>
        <module>server2</module>
        <module>server3</module>
        <module>server4</module>
    </modules>

    <name>zipkinServer</name>
    <description>zipkinServer</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <!--<scope>test</scope>-->
        </dependency>
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
            <version>2.2.8.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

Solution

1. Change the version number of springboot to be compatible with spring cloud, and change 2.6.2 to 2.3.1.RELEASE

    <groupId>com.yg</groupId>
    <artifactId>zipkinServer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

2. Start the project and the project operates normally

  .   ____          _            __ _ _
 /\\/___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, |////
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.3.1.RELEASE)

2022-01-07 14:35:36.562  INFO [server1,,,] 75632 --- [           main] com.yg.server1.Server1Application        : No active profile set, falling back to default profiles: default
2022-01-07 14:35:37.364  INFO [server1,,,] 75632 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=1290f246-8e40-31ab-9e9d-b72d338f57f1
2022-01-07 14:35:38.024  INFO [server1,,,] 75632 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8081 (http)
2022-01-07 14:35:38.037  INFO [server1,,,] 75632 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2022-01-07 14:35:38.038  INFO [server1,,,] 75632 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.36]
2022-01-07 14:35:38.202  INFO [server1,,,] 75632 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2022-01-07 14:35:38.202  INFO [server1,,,] 75632 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1620 ms
2022-01-07 14:35:39.598  INFO [server1,,,] 75632 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2022-01-07 14:35:42.068  INFO [server1,,,] 75632 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8081 (http) with context path ''
2022-01-07 14:35:43.474  INFO [server1,,,] 75632 --- [           main] com.yg.server1.Server1Application        : Started Server1Application in 11.085 seconds (JVM running for 13.665)