dubbo關閉時出現錯誤資訊

2020-06-26 12:15:40.365  WARN 7756 --- [extShutdownHook] o.a.d.r.integration.RegistryProtocol     :  [DUBBO] unsubscribe listener == null, dubbo version: 2.7.6, current host: 192.168.164.161



java.lang.IllegalArgumentException: unsubscribe listener == null

	at org.apache.dubbo.registry.support.AbstractRegistry.unsubscribe(AbstractRegistry.java:325) ~[dubbo-2.7.6.jar:2.7.6]

	at org.apache.dubbo.registry.support.FailbackRegistry.unsubscribe(FailbackRegistry.java:329) ~[dubbo-2.7.6.jar:2.7.6]

	at org.apache.dubbo.registry.ListenerRegistryWrapper.unsubscribe(ListenerRegistryWrapper.java:129) ~[dubbo-2.7.6.jar:2.7.6]

	at org.apache.dubbo.registry.integration.RegistryProtocol$ExporterChangeableWrapper.unexport(RegistryProtocol.java:735) ~[dubbo-2.7.6.jar:2.7.6]

	at org.apache.dubbo.registry.integration.RegistryProtocol$DestroyableExporter.unexport(RegistryProtocol.java:554) [dubbo-2.7.6.jar:2.7.6]

	at org.apache.dubbo.config.ServiceConfig.unexport(ServiceConfig.java:170) [dubbo-2.7.6.jar:2.7.6]

	at com.alibaba.cloud.dubbo.service.DubboMetadataServiceExporter.unexport(DubboMetadataServiceExporter.java:103) [spring-cloud-starter-dubbo-2.2.1.RELEASE.jar:2.2.1.RELEASE]

	at com.alibaba.cloud.dubbo.autoconfigure.DubboMetadataAutoConfiguration.unExportDubboMetadataConfigService(DubboMetadataAutoConfiguration.java:118) [spring-cloud-starter-dubbo-2.2.1.RELEASE.jar:2.2.1.RELEASE]

	at com.alibaba.cloud.dubbo.autoconfigure.DubboMetadataAutoConfiguration.onContextClosed(DubboMetadataAutoConfiguration.java:109) [spring-cloud-starter-dubbo-2.2.1.RELEASE.jar:2.2.1.RELEASE]

	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_191]

	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_191]

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_191]

	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_191]

	at org.springframework.context.event.ApplicationListenerMethodAdapter.doInvoke(ApplicationListenerMethodAdapter.java:305) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]

	at org.springframework.context.event.ApplicationListenerMethodAdapter.processEvent(ApplicationListenerMethodAdapter.java:190) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]

	at org.springframework.context.event.ApplicationListenerMethodAdapter.onApplicationEvent(ApplicationListenerMethodAdapter.java:153) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]

	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]

	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]

	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]

	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:403) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]

	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]

	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1012) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]

	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:948) [spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]





2020-06-26 12:15:40.372  INFO 7756 --- [extShutdownHook] o.a.d.rpc.protocol.dubbo.DubboProtocol   :  [DUBBO] Close dubbo server: /10.0.75.1:20880, dubbo version: 2.7.6, current host: 192.168.164.161

Exception in thread "DubboShutdownHook" java.lang.RuntimeException: java.util.ConcurrentModificationException

	at org.apache.dubbo.common.function.ThrowableAction.execute(ThrowableAction.java:48)

	at org.apache.dubbo.common.lang.ShutdownHookCallbacks.lambda$callback$0(ShutdownHookCallbacks.java:70)

	at java.lang.Iterable.forEach(Iterable.java:75)

	at org.apache.dubbo.common.lang.ShutdownHookCallbacks.callback(ShutdownHookCallbacks.java:70)

	at org.apache.dubbo.config.DubboShutdownHook.callback(DubboShutdownHook.java:85)

	at org.apache.dubbo.config.DubboShutdownHook.run(DubboShutdownHook.java:73)

Caused by: java.util.ConcurrentModificationException

	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1442)

	at java.util.HashMap$ValueIterator.next(HashMap.java:1471)

	at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1042)

	at org.apache.dubbo.registry.support.AbstractRegistryFactory.destroyAll(AbstractRegistryFactory.java:85)

	at org.apache.dubbo.config.DubboShutdownHook.destroyAll(DubboShutdownHook.java:128)

	at org.apache.dubbo.config.bootstrap.DubboBootstrap.destroy(DubboBootstrap.java:1039)

	at org.apache.dubbo.config.bootstrap.DubboBootstrap$1.callback(DubboBootstrap.java:191)

	at org.apache.dubbo.common.function.ThrowableAction.execute(ThrowableAction.java:46)

	... 5 more

    <dependencies>

        <!-- common start -->

        <!-- 使用nacos作為所有服務的注冊中心-->

        <dependency>

            <groupId>com.alibaba.cloud</groupId>

            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>

        </dependency>

        <dependency>

            <groupId>com.alibaba.cloud</groupId>

            <artifactId>spring-cloud-starter-dubbo</artifactId>

        </dependency>

        <dependency>

            <groupId>mysql</groupId>

            <artifactId>mysql-connector-java</artifactId>

        </dependency>

        <!-- common end -->



        <dependency>

            <groupId>orgxxx</groupId>

            <artifactId>demo01-api</artifactId>

            <version>${project.parent.version}</version>

        </dependency>

    </dependencies>

spring:

  application:

    name: demo01

  cloud:

    nacos:

      server-addr: my.service.com:8848

  main:

    allow-bean-definition-overriding: true

  datasource:

    type: com.zaxxer.hikari.HikariDataSource

    driver-class-name: com.mysql.cj.jdbc.Driver

    url: jdbc:mysql://my.service.com:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT%2B8

    username: root

    password: 123456

dubbo:

  application:

    name: demo01

  protocol:

    serialization: kryo

    name: dubbo

    port: -1

  scan:

    base-packages: org.xxx.financial.provider.service

  registry:

    address: nacos://${spring.cloud.nacos.server-addr}

  cloud:

    subscribed-services: demo01

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