Tag Archives: doubbo

mybatis-plus Common Error and Their Solution

2021/7/9

Error 1: there is no @EnumValue annotation when writing enumeration class

Solution 1: @EnumValueis an annotation supported after mybatis-plus version 3.0

 

Error 2:

java.lang.annotation.AnnotationFormatError: Invalid default: public abstract java.lang.Class org.mybatis.spring.annotation.MapperScan.factoryBean()

Solution 2:

Modify the dependency from

<dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>3.3.2</version>
        </dependency>

to

 <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.0.5</version>
        </dependency>

 

Error 3:
java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘***’: Unsatisfied dependency

Solution 3:

Delete the dependency of mybaits

 <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>

 

Error 4:

The list() method reports red, indicating that the parameter is missing,

Solution 4:

View source code

Method does require parameters

View official documents

It may be due to the version problem. In the latest version, you do not need to pass the parameter. The parameter should be null

Problem-solving

 

Error 5:

java.lang.IllegalArgumentException: No enum constant com.book.bookshop.entity.enums.Suit.1

Solution 5:

Removing spring-boot-devtools, this plug-in will cause many problems. It is estimated that it should be the main reason

[Solved] SpringBoot+Dubbo Startup Error: Fail to start server(url dubbo192.168.0.920880service

When using springboot + Dubbo, the startup project reports an error

All error information is 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]

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] Error–dubbo Connect zk Error: zookeeper not connected

Error Message:

Error creating bean with name 'dubboBootstrapApplicationListener': Initialization of bean failed; nested exception is java.lang.IllegalStateException: zookeeper not connected

 

Problem:
The project starts with the following error.
IllegalStateException: zookeeper not connected

Reason:
First of all, the default connection timeout for dubbo registration is 5 seconds.
And the zookeeper server I connected to was a little slow to access, which caused the connection to time out.

Solution:
Adjust the default registration time for dubbo to 200 seconds
The default registration timeout is 5 seconds
All others are 1 second
So I increased the timeout for other service calls as well.
If you only need to modify the registration timeout, just add or modify registry.

dubbo:
  registry:
    timeout: 200000
  service:
    timeout: 200000
  consumer: 
    timeout: 200000
  provider:
    timeout: 200000

[Solved] fasterxml ToStringSerializerBase Error: Caused by: java.lang.NoClassDefFoundError…

Tostringserializerbase reports an error

Error content

Integration Dubbo times error

Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/ser/std/ToStringSerializerBase
	at com.fasterxml.jackson.datatype.jsr310.JavaTimeModule.<init>(JavaTimeModule.java:158) ~[jackson-datatype-jsr310-2.13.2.jar:2.13.2]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_322]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_322]
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_322]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_322]
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:211) ~[spring-beans-5.3.18.jar:5.3.18]
	... 69 common frames omitted

reason

Dubbo dependency needs the support of fasterxml

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>3.0.7</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-rpc-dubbo</artifactId>
            <version>3.0.7</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-zookeeper</artifactId>
            <version>3.0.7</version>
        </dependency>

solve

Add dependency

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.10.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.10.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.10.1</version>
        </dependency>

Complete dependency

    <dependencies>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.10.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.10.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.10.1</version>
        </dependency>


        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>3.0.7</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-rpc-dubbo</artifactId>
            <version>3.0.7</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-zookeeper</artifactId>
            <version>3.0.7</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>2.6.6</version>
        </dependency>

        <dependency>
            <groupId>org.example</groupId>
            <artifactId>common</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

    </dependencies>

 

[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 ~ ~

Dubbo Frame Write Junit Error: ERROR org.springframework.test.context.Testcontextmanager

Solution:

Since the Dubbo framework is used, on the premise that we confirm that there is no problem with JUnit unit test environment:

First, check whether the Dubbo service is enabled; Secondly, if the test class is written in the consumer module, you need to check whether the provider service is enabled;

Start the corresponding service to solve the problem.

Detailed error reporting information is as follows:

[main] ERROR org. springframework. test. context. TestContextManager – Caught exception while allowing TestExecutionListener [org.springframework.test.context.support. DependencyInjectionTestExecutionListener@333398f ] to prepare test instance [com.yangdaxian.test. MyTest@103c97ff ]

Some detailed error messages are as follows:

19:51:44.947 [main] ERROR org.springframework.test.context.TestContextManager - Caught exception while allowing TestExecutionListener [org.springframework.test.context.support.DependencyInjectionTestExecutionListener@333398f] to prepare test instance [com..test.MyTest@103c97ff]
java.lang.IllegalStateException: Failed to load ApplicationContext
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125) ~[spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108) ~[spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:118) ~[spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) ~[spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246) [spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227) [spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) [spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12]
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) [spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246) [spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) [spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) [spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137) [junit-4.12.jar:4.12]
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69) [junit-rt.jar:?]
	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) [junit-rt.jar:?]
	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:221) [junit-rt.jar:?]
	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54) [junit-rt.jar:?]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'newsController': Injection of @DubboReference dependencies is failed; nested exception is java.lang.IllegalStateException: Failed to check the status of the service com..service.NewsService. No provider available for the service com..service.NewsService from the url dubbo://192.168.66.1/com.yangziqiang.service.NewsService?application=demo-consumer&dubbo=2.0.2&init=false&interface=com.yangziqiang.service.NewsService&metadata-type=remote&methods=count1,listNews,showMsg&pid=17984&register.ip=192.168.66.1&release=2.7.10&side=consumer&sticky=false&timestamp=1640001099664 to the consumer 192.168.66.1 use dubbo version 2.7.10
	at com.alibaba.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor.postProcessPropertyValues(AbstractAnnotationBeanPostProcessor.java:149) ~[spring-context-support-1.0.10.jar:?]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1400) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:849) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:128) ~[spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:60) ~[spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.delegateLoading(AbstractDelegatingSmartContextLoader.java:275) ~[spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext(AbstractDelegatingSmartContextLoader.java:243) ~[spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99) ~[spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117) ~[spring-test-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	... 24 more
Caused by: java.lang.IllegalStateException: Failed to check the status of the service

Dubbo SPI custom equalization policy error

 

Problem Description: I use idea to create   Meta-inf/Dubbo folder. However, due to idea’s own reasons, two layers of folders cannot be created continuously.

META-INF.dubbo     It was actually created by a   Meta-inf.dubbo folder.

Cause error:

No such extension org.apache.dubbo.rpc.cluster.loadbalance by name XX, no related exception was found, please check whatever related SPI module is missing.

solution:

Create folders layer by layer. Ensure that there are meta-inf and Dubbo folders under the resource, then there is no problem

ZK Error contacting service. It is probably not running [How to Solve]

A bug was encountered while recording the test

After initiating the request, return to 502 bad gateway (nginx/1.1.19) to check that nginx starts normally. After checking the back-end log, an error is found

java.net.ConnectException: Connection refused
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)

The error message shows that the Dubbo link and the zookeeper link are not available

Find the bin directory of zookeeper and use./zkserver.sh start to start normally
but when using./zkserver.sh status, an error is found in the error contacting service. It is probable not running

ZooKeeper JMX enabled by default
Using config: /opt/zk1/zookeeper-3.4.10/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.

Use the systemctl status ZK command to view the status (small gray dots)

● zk.service - Zookeeper Service
   Loaded: loaded (/etc/systemd/system/zk.service; enabled; vendor preset: enabled)
   Active: activating (start-post) (Result: exit-code) since Mon 2021-10-11 20:17:54 CST; 2s ago
  Process: 9433 ExecStop=/opt/zk1/zookeeper-3.4.10/bin/zkServer.sh stop (code=exited, status=0/SUCCESS)
  Process: 9448 ExecStart=/opt/zk1/zookeeper-3.4.10/bin/zkServer.sh start (code=exited, status=0/SUCCESS)
 Main PID: 9458 (code=exited, status=1/FAILURE);         : 9485 (sleep)
    Tasks: 1
   Memory: 256.0K
      CPU: 3.695s
   CGroup: /system.slice/zk.service
           └─control
             └─9485 /bin/sleep 4
             
Oct 11 20:17:54 ubuntu systemd[1]: Starting Zookeeper Service...
Oct 11 20:17:54 ubuntu zkServer.sh[9448]: ZooKeeper JMX enabled by default
Oct 11 20:17:54 ubuntu zkServer.sh[9448]: Using config: /opt/zk1/zookeeper-3.4.10/bin/../conf/zoo.cfg
Oct 11 20:17:55 ubuntu zkServer.sh[9448]: Starting zookeeper ... STARTED
Oct 11 20:17:56 ubuntu systemd[1]: zk.service: Main process exited, code=exited, status=1/FAILURE

Attempt to start systemctl start ZK

Job for zk.service failed because the control process exited with error code. See "systemctl status zk.service" and "journalctl -xe" for details.

Check systemctl status ZK again

● zk.service - Zookeeper Service
   Loaded: loaded (/etc/systemd/system/zk.service; enabled; vendor preset: enabled)
   Active: activating (start-post) since Mon 2021-10-11 20:18:16 CST; 1s ago
  Process: 9894 ExecStop=/opt/zk1/zookeeper-3.4.10/bin/zkServer.sh stop (code=exited, status=0/SUCCESS)
  Process: 9910 ExecStart=/opt/zk1/zookeeper-3.4.10/bin/zkServer.sh start (code=exited, status=0/SUCCESS)
 Main PID: 9920 (java);         : 9953 (sleep)
    Tasks: 26
   Memory: 170.6M
      CPU: 3.268s
   CGroup: /system.slice/zk.service
           ├─9920 java -Dzookeeper.log.dir=. -Dzookeeper.root.logger=INFO,ROLLINGFILE -cp /opt/zk1/zookeeper-3.4.10/bin/../build/classes:/opt/zk1/zookeeper-3.4.10/bin/../build/lib/*.jar:/
           └─control
             └─9953 /bin/sleep 4

Oct 11 20:18:16 ubuntu systemd[1]: Starting Zookeeper Service...
Oct 11 20:18:16 ubuntu zkServer.sh[9910]: ZooKeeper JMX enabled by default
Oct 11 20:18:16 ubuntu zkServer.sh[9910]: Using config: /opt/zk1/zookeeper-3.4.10/bin/../conf/zoo.cfg
Oct 11 20:18:17 ubuntu zkServer.sh[9910]: Starting zookeeper ... STARTED

I still can’t find it
view the configuration file less zoo.cfg to find the log path

dataLogDir=/opt/zk1/zookeeper-3.4.10/datalog

Enter/opt/ZK1/zookeeper-3.4.10/datalog/version-2 and find a log suspected to be damaged (log. 220770)

-rw-r--r-- 1 root root 67108880 Sep 22 00:21 log.1ce8b6
-rw-r--r-- 1 root root 67108880 Sep 22 02:30 log.1e0dbe
-rw-r--r-- 1 root root 67108880 Sep 22 11:15 log.1e4a05
-rw-r--r-- 1 root root 67108880 Sep 22 20:26 log.1f407d
-rw-r--r-- 1 root root 67108880 Sep 23 02:30 log.20427c
-rw-r--r-- 1 root root 67108880 Sep 23 12:32 log.20ecc9
-rw-r--r-- 1 root root        0 Sep 23 12:33 log.220770

Delete this log RM log.220770 start again and check the status
systemctl start ZK systemctl status ZK (small green dot)

● zk.service - Zookeeper Service
   Loaded: loaded (/etc/systemd/system/zk.service; enabled; vendor preset: enabled)
   Active: active (running) since Mon 2021-10-11 20:19:30 CST; 5s ago
  Process: 11032 ExecStop=/opt/zk1/zookeeper-3.4.10/bin/zkServer.sh stop (code=exited, status=0/SUCCESS)
  Process: 11088 ExecStartPost=/bin/sleep 4 (code=exited, status=0/SUCCESS)
  Process: 11047 ExecStart=/opt/zk1/zookeeper-3.4.10/bin/zkServer.sh start (code=exited, status=0/SUCCESS)
 Main PID: 11057 (java)
    Tasks: 28
   Memory: 222.5M
      CPU: 4.229s
   CGroup: /system.slice/zk.service
           └─11057 java -Dzookeeper.log.dir=. -Dzookeeper.root.logger=INFO,ROLLINGFILE -cp /opt/zk1/zookeeper-3.4.10/bin/../build/classes:/opt/zk1/zookeeper-3.4.10/bin/../build/lib/*.jar:

Oct 11 20:19:25 ubuntu systemd[1]: Starting Zookeeper Service...
Oct 11 20:19:25 ubuntu zkServer.sh[11047]: ZooKeeper JMX enabled by default
Oct 11 20:19:25 ubuntu zkServer.sh[11047]: Using config: /opt/zk1/zookeeper-3.4.10/bin/../conf/zoo.cfg
Oct 11 20:19:26 ubuntu zkServer.sh[11047]: Starting zookeeper ... STARTED
Oct 11 20:19:30 ubuntu systemd[1]: Started Zookeeper Service.

Restart the back-end service. The error is found and solved
in addition, there are other situations that can lead to this problem
1. The firewall is not closed
Ubuntu
CentOS
2. The port is occupied
netstat – ANP | grep port number
kill – 9 ID

Dubbo Error: getPropertyValue: inconsistent stack height -1

dubbo error:  getPropertyValue (Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object; in com.alibaba.dubbo.common.bytecode.Wrapper8: inconsistent stack height -1
Error Message:

java.lang.RuntimeException: [source error] getPropertyValue (Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object; in com.alibaba.dubbo.common.bytecode.Wrapper8: inconsistent stack height -1
	at com.alibaba.dubbo.common.bytecode.ClassGenerator.toClass(ClassGenerator.java:301)
	at com.alibaba.dubbo.common.bytecode.ClassGenerator.toClass(ClassGenerator.java:255)
	at com.alibaba.dubbo.common.bytecode.Wrapper.makeWrapper(Wrapper.java:245)
	at com.alibaba.dubbo.common.bytecode.Wrapper.getWrapper(Wrapper.java:107)
	at com.alibaba.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:445)
	at com.alibaba.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:358)
	at com.alibaba.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:317)
	at com.alibaba.dubbo.config.ServiceConfig.export(ServiceConfig.java:216)
	at com.alibaba.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:123)
	at com.alibaba.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:49)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:167)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:337)
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:882)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545)
	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:443)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:325)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4685)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5146)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:932)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:633)
	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.start(Bootstrap.java:344)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:475)
Caused by: javassist.CannotCompileException: [source error] getPropertyValue (Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object; in com.alibaba.dubbo.common.bytecode.Wrapper8: inconsistent stack height -1
	at javassist.CtNewMethod.make(CtNewMethod.java:79)
	at javassist.CtNewMethod.make(CtNewMethod.java:45)
	at com.alibaba.dubbo.common.bytecode.ClassGenerator.toClass(ClassGenerator.java:280)
	... 48 more
Caused by: compile error: getPropertyValue (Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object; in com.alibaba.dubbo.common.bytecode.Wrapper8: inconsistent stack height -1
	at javassist.compiler.Javac.compile(Javac.java:104)
	at javassist.CtNewMethod.make(CtNewMethod.java:74)
	... 50 more

Dubbo stipulates that the interface name with empty return value in the service interface cannot start with get!

Change the name of the method starting with get or add the return value type.