Category Archives: JAVA

[Solved] SpringBoot Project Startup Error: Field userMapper in com.demo.controller.MemberController required a bean of type ‘c

Error:
SpringBoot Project Startup Error: ‘com.xxx.mapper.XxxxMapper’ that could not be found

*************************** APPLICATION FAILED TO START

Description:
Field userMapper in com.demo.controller.MemberController required a
bean of type ‘com.demo.mapper.UserMapper’ that could not be found.
Action:
Consider defining a bean of type ‘com.demo.mapper.UserMapper’ in your
configuration.
Process finished with exit code 1

Reason: Cound not scan to find the mapper

Solution: Add @MapperScan("com.demo.mapper") in startup

[Solved] seata Error: io.seata.rm.datasource.exec.LockConflictException: get global lock fail, xid:xxx, lockKeys:xxx

io.seata.rm.datasource.exec.LockConflictException: get global lock fail, xid:xxx, lockKeys:xxx
the error here shows that the global lock acquisition failed
in fact, it may not be the problem of global lock. Here, you can directly check the detailed error in the log file of Seata server

determine the error information

the error of Seata here is because the table field of Seata database is smaller by default and longer_ the table_name will be OK.

[Solved] SpringBoot Create Project and Failed to Access localhost:8080 Error

1. Error prompt

java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.getHttpServletMapping()Ljavax/servlet/http/HttpServletMapping;

 

2. The reason is that the Tomcat version is incompatible with springboot

I use

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.10.RELEASE</version>
</parent>

2. The solution is to modify the below codes in pom.xml

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.10.RELEASE</version>
</parent>

to:

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.5.RELEASE</version>
</parent>

Problem-solving

Idea2022 automatic generate poji error [How to Solve]

Error Messages:
Generate POJOs. groovy: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: Script6. groovy: 29: unable to resolve class FileDemo @ line 29, column 3.  new FileDemo(dir, className + ".java"). withPrintWriter { out -> generate(out, className,  fields) } ^ 1 error at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:295) at org.codehaus.groovy.control.CompilationUnit$ISourceUnitOperation.doPhaseOperation(CompilationUnit.java:914) at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:627) at  groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:389) at groovy.lang.GroovyClassLoader.lambda$parseClass$3(GroovyClassLoader.java:332) at org.codehaus.groovy.runtime.memoize.StampedCommonCache.compute(StampedCommonCache.java:163) at org.codehaus.groovy.runtime.memoize.StampedCommonCache.getAndPut(StampedCommonCache.java:154) at  groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:330) at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:314) at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:257) at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.getScriptClass(GroovyScriptEngineImpl.java:336) at  org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:153) at java.scripting/javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264) in IdeScriptEngineManagerImpl$EngineImpl.lambda$eval$1(IdeScriptEngineManagerImpl.java:246)

 

Solution: Delete the old script and create a new one as below:
import com.intellij.database.model.DasTable
import com.intellij.database.util.Case
import com.intellij.database.util.DasUtil

/*
 * Available context bindings:
 *   SELECTION   Iterable<DasObject>
 *   PROJECT     project
 *   FILES       files helper
 */

packageName = "com.sample;"
typeMapping = [
  (~/(?i)int/)                      : "long",
  (~/(?i)float|double|decimal|real/): "double",
  (~/(?i)datetime|timestamp/)       : "java.sql.Timestamp",
  (~/(?i)date/)                     : "java.sql.Date",
  (~/(?i)time/)                     : "java.sql.Time",
  (~/(?i)/)                         : "String"
]

FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir ->
  SELECTION.filter { it instanceof DasTable }.each { generate(it, dir) }
}

def generate(table, dir) {
  def className = javaName(table.getName(), true)
  def fields = calcFields(table)
  new File(dir, className + ".java").withPrintWriter { out -> generate(out, className, fields) }
}

def generate(out, className, fields) {
  out.println "package $packageName"
  out.println ""
  out.println ""
  out.println "public class $className {"
  out.println ""
  fields.each() {
    if (it.annos != "") out.println "  ${it.annos}"
    out.println "  private ${it.type} ${it.name};"
  }
  out.println ""
  fields.each() {
    out.println ""
    out.println "  public ${it.type} get${it.name.capitalize()}() {"
    out.println "    return ${it.name};"
    out.println "  }"
    out.println ""
    out.println "  public void set${it.name.capitalize()}(${it.type} ${it.name}) {"
    out.println "    this.${it.name} = ${it.name};"
    out.println "  }"
    out.println ""
  }
  out.println "}"
}

def calcFields(table) {
  DasUtil.getColumns(table).reduce([]) { fields, col ->
    def spec = Case.LOWER.apply(col.getDataType().getSpecification())
    def typeStr = typeMapping.find { p, t -> p.matcher(spec).find() }.value
    fields += [[
                 name : javaName(col.getName(), false),
                 type : typeStr,
                 annos: ""]]
  }
}

def javaName(str, capitalize) {
  def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)
    .collect { Case.LOWER.apply(it).capitalize() }
    .join("")
    .replaceAll(/[^\p{javaJavaIdentifierPart}[_]]/, "_")
  capitalize || s.length() == 1? s : Case.LOWER.apply(s[0]) + s[1..-1]
}

[Solved] IDEA springboot Startup Error: java.lang.UnsatisfiedLinkError: no tcnative-1 in java.library.path

IDEA springboot startup error:

java.lang.UnsatisfiedLinkError: no tcnative-1 in java.library.path: [D:\Java\bin, C:\Windows\Sun\Java\bin, C:\Windows\system32, C:\Windows, C:\Program Files\Common Files\Oracle\Java\javapath, C:\Windows\system32, C:\Windows, C:\Windows\System32\Wbem, C:\Windows\System32\WindowsPowerShell\v1.0\, C:\Windows\System32\OpenSSH\, D:\java\bin, ;D:\tomcat\apache-tomcat-10.0.14\bin;D:\tomcat\apache-tomcat-10.0.14\lib, D:\apache-maven-3.8.4\bin, D:\Xshell\, D:\5.1, D:\5.1\clibs, C:\Users\cqb\AppData\Local\Microsoft\WindowsApps, ., .]
    at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2660) ~[na:na]
    at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:827) ~[na:na]
    at java.base/java.lang.System.loadLibrary(System.java:1871) ~[na:na]
    at org.apache.tomcat.jni.Library.<init>(Library.java:69) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.tomcat.jni.Library.initialize(Library.java:206) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.AprLifecycleListener.init(AprLifecycleListener.java:193) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.apache.catalina.core.AprLifecycleListener.isAprAvailable(AprLifecycleListener.java:102) ~[tomcat-embed-core-9.0.46.jar:9.0.46]
    at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getDefaultLifecycleListeners(TomcatServletWebServerFactory.java:173) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.<init>(TomcatServletWebServerFactory.java:120) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryConfiguration$EmbeddedTomcat.tomcatServletWebServerFactory(ServletWebServerFactoryConfiguration.java:76) ~[spring-boot-autoconfigure-2.5.1.jar:2.5.1]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:638) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1334) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213) ~[spring-beans-5.3.8.jar:5.3.8]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getWebServerFactory(ServletWebServerApplicationContext.java:217) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:160) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:577) ~[spring-context-5.3.8.jar:5.3.8]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-2.5.1.jar:2.5.1]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332) ~[spring-boot-2.5.1.jar:2.5.1]
    at cn.com.buba.SpringbootDemoApplication.main(SpringbootDemoApplication.java:10) ~[classes/:na]
2022-05-03 14:45:28.909  INFO 6716 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2022-05-03 14:45:28.916  INFO 6716 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2022-05-03 14:45:28.916  INFO 6716 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.46]
2022-05-03 14:45:28.973  INFO 6716 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2022-05-03 14:45:28.973  INFO 6716 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 575 ms
2022-05-03 14:45:29.193  INFO 6716 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2022-05-03 14:45:29.200  INFO 6716 --- [           main] cn.com.buba.SpringbootDemoApplication    : Started SpringbootDemoApplication in 1.1 seconds (JVM running for 1.953)

 

Solution:


-Djava.library.path=/usr/local/java/lib:/usr/local/hadoop/lib

How to Solve JD-GUI Start Error (Mac ARM Version)

Here is a solution to solve JD-GUI Starting Error in Mac ARM Version.

 

How to solve:

  1. Go to the Application folder, select JD-GUI.app, right click and select “Show Package Contents”.
  2. Edit the package under . /Contents/MacOS/universalJavaApplicationStub.sh file under the package
  3. Find the Github repository URL commented in the script and access it
  4. Download the latest version of the script from Release and replace it with a sh file name extension

[Solved] Seata Error: endpoint format should like ip:port

Abnormal scene

Failed to get available servers: endpoint format should like ip:port

Cause of error

Ensure that the versions are consistent. The server version downloaded by Seata must be consistent with the dependent version introduced by Maven

Locally installed version

I use seata1 locally Version 4.0

Maven import version

The imported version is cloud version 2.2.7, which encapsulates Seata

Correspondence between Seata and cloud

How to solve

Just keep the locally installed version of Seata consistent with the version imported by Maven. After I change the imported version of maven, I can introduce Seata version 1.4.0.

 <!-- https://mvnrepository.com/artifact/io.seata/seata-spring-boot-starter -->
 <dependency>
     <groupId>io.seata</groupId>
     <artifactId>seata-spring-boot-starter</artifactId>
     <version>1.4.0</version>
 </dependency>

Of course, you can also go to the official website of Seata to download the corresponding seata1.3 version to Maven.

[Solved] ApiPost Error: org.springframework.web.multipart.MultipartException

Want to know what about ApiPost? I tested the interface of list query written by myself. I don’t need to pass in parameters or header. Postman can be adjusted. As a result, it always reports the error: org.springframework.web.multipart.MultipartException.
detailed error reports are as follows:

org.springframework.web.multipart.MultipartException: Failed to parse multipart servlet request; nested exception is java.io.IOException: The temporary upload location [C:\Users\qinguangqian\AppData\Local\Temp\tomcat.1854001921343907511.8888\work\Tomcat\localhost\lovol\usr\local\webServer\temp] is not valid

Finally, it is found that ApiPost uses the body type parameter by default, and the format is set to none

[Solved] Springboot Deploy Error: Input length = 1 or Input length = 2

org. yaml. snakeyaml. error. YAMLException: java. nio. charset. MalformedInputExcep

reason:

1. The text code in YML file is GBK format

Solution:

1. Open settings-Editor-File Econdings in idea, set yml to UTF-8

2. Copy the yml content, delete application.yml, modify the content to UTF-8 format by notepad, then recreate the yml file and put the content into it.

3. Set the yml encoding in settings, without deleting the yml file, Build –> Rebuild Project, resume running. [I haven’t tried this method]

[Solved] Project Startup Error: Redis health check failed：Unable to connect to localhost6379

Error reporting details

Analysis and solution

There is no connection of Redis in my project, so it’s strange to report an error. Combined with the sentence redis health check failed , I guess maybe someone introduced Redis, and then do the health check of redis.

Solution: Configurate as below in application.yml:

# Disable Actuator Monitoring of Redis Connections
management:
  health:
    redis:
      enabled: false

[Solved] MongoDB Error: Command failed with error 251 (NoSuchTransaction)

Recently, I encountered an online bug. Accessing a specific interface will cause occasional exceptions. After checking the log, it is found that an error is reported during the operation of mongodb. The error information is as follows:

error message: Command failed with error 251 (NoSuchTransaction): 'Given transaction number 115 does not match any in-progress transactions. The active transaction number is 114' on server xx.xx.xx.xx:xxxx. The full response is {"errorLabels": ["TransientTransactionError"], "ok": 0.0, "errmsg": "Given transaction number 115 does not match any in-progress transactions. The active transaction number is 114", "code": 251, "codeName": "NoSuchTransaction"}

Through searching and troubleshooting, the problem was located to be due to processing MongoDB operations where two requests in the same transaction are sent to the DB at the same time, with the probability of generating the following scenario.

1. request 1 and request 2 are sent to Mongo at the same time and start execution
2. Request 1 is still executing and request 2 has completed
3. Since request 1 is not yet completed, the transaction has not really started at DB level, so request 2 cannot end normally (that is why the error states that transaction id 115 cannot be found, because the transaction is not yet registered in DB), resulting in transaction rollback and throwing exceptions
4. request 1 execution is complete, but the transaction has been rolled back, the operation is invalid
Reviewing the code, we found that the reason why two requests are sent to DB at the same time is that the zipWith() method is used for data merging. The feature of this method is that it will request two data to be merged to the database at the same time, which will trigger the aforementioned problem when operating Mongo.

The solution is very simple, just use the zipWhen() method instead. zipWhen will block and wait for the first data requested to arrive before requesting the second data, which perfectly circumvents this problem.

[Solved] Error processing condition on org.springframework.boot.autoconfigure.context.PropertyPlaceholderA

The error information is as follows:

2022-04-21 17:43:26.473 ERROR [em-service,,,] 17272 --- [           main] org.springframework.boot.SpringApplication : Application run failed

java.lang.IllegalStateException: Error processing condition on org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration.propertySourcesPlaceholderConfigurer
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:64)
    at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108)
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:180)
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:141)
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:117)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:328)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:233)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:271)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:91)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:694)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:762)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:398)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:330)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1258)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246)
    at com.ey.fssc.em.EmApplication.main(EmApplication.java:30)
Caused by: java.lang.reflect.MalformedParameterizedTypeException: null
    at sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.validateConstructorArguments(ParameterizedTypeImpl.java:58)
    at sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.<init>(ParameterizedTypeImpl.java:51)
    at sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.make(ParameterizedTypeImpl.java:92)
    at sun.reflect.generics.factory.CoreReflectionFactory.makeParameterizedType(CoreReflectionFactory.java:105)
    at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:140)
    at sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)
    at sun.reflect.generics.repository.MethodRepository.getReturnType(MethodRepository.java:68)
    at java.lang.reflect.Method.getGenericReturnType(Method.java:255)
    at org.springframework.core.MethodParameter.getGenericParameterType(MethodParameter.java:419)
    at org.springframework.core.SerializableTypeWrapper$MethodParameterTypeProvider.getType(SerializableTypeWrapper.java:317)
    at org.springframework.core.SerializableTypeWrapper.forTypeProvider(SerializableTypeWrapper.java:137)
    at org.springframework.core.ResolvableType.forType(ResolvableType.java:1384)
    at org.springframework.core.ResolvableType.forMethodParameter(ResolvableType.java:1285)
    at org.springframework.core.ResolvableType.forMethodParameter(ResolvableType.java:1251)
    at org.springframework.core.ResolvableType.forMethodReturnType(ResolvableType.java:1194)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:779)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:659)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:627)
    at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1489)
    at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1012)
    at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.addBeanTypeForNonAliasDefinition(BeanTypeRegistry.java:180)
    at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.addBeanTypeForNonAliasDefinition(BeanTypeRegistry.java:160)
    at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.addBeanType(BeanTypeRegistry.java:153)
    at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.updateTypesIfNecessary(BeanTypeRegistry.java:215)
    at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.getNamesForType(BeanTypeRegistry.java:115)
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.collectBeanNamesForType(OnBeanCondition.java:265)
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:254)
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchingBeans(OnBeanCondition.java:196)
    at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:116)
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47)
    ... 17 common frames omitted

By:

at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:64)

I thought the PropertyPlaceholderAutoConfiguration class didn’t match automatically. After checking, it’s not the problem.

Then by:

Caused by: java.lang.reflect.MalformedParameterizedTypeException: null
	at java.lang.reflect.Method.getGenericReturnType(Method.java:255)
	at org.springframework.core.MethodParameter.getGenericParameterType(MethodParameter.java:419)

Find the problem that may be the type mismatch, go to the breakpoint where the error occurs, and debug:

From the figure, you can see that when redis does the configuration, the type returned is GenericObjectPoolConfig<? >, search the code and find where redis configures the data source.

Defining the return type is indeed GenericObjectPoolConfig<? >, however, clicking GenericObjectPoolConfig jumps to:

I found that the referenced class, surprisingly GenericObjectPoolConfig after not with a generic, so strange!

Could it be a version problem? So, I checked the project dependency tree and found that I was right in guessing that two different versions of commons-pool jars had been introduced.

Checking the code, in version 2.8.0, GenericObjectPoolConfig<T> with generic type is used.

When the problem is found, the jar package of version 2.5.0 is excluded from the POM dependency.

Restart the project, normal.