kafka 并发数配置过程中踩到的坑 InstanceAlreadyExistsException

] WARN  org.apache.kafka.common.utils.AppInfoParser- Error registering AppInfo mbean
javax.management.InstanceAlreadyExistsException: kafka.consumer:type=app-info,id=consumer-
    at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:)
    at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:)
    at org.apache.kafka.common.utils.AppInfoParser.registerAppInfo(AppInfoParser.java:)
    at org.apache.kafka.clients.consumer.KafkaConsumer.<init>(KafkaConsumer.java:)
    at org.apache.kafka.clients.consumer.KafkaConsumer.<init>(KafkaConsumer.java:)
    at org.springframework.kafka.core.DefaultKafkaConsumerFactory.createKafkaConsumer(DefaultKafkaConsumerFactory.java:)
    at org.springframework.kafka.core.DefaultKafkaConsumerFactory.createKafkaConsumer(DefaultKafkaConsumerFactory.java:)
    at org.springframework.kafka.core.DefaultKafkaConsumerFactory.createKafkaConsumer(DefaultKafkaConsumerFactory.java:)
    at org.springframework.kafka.core.DefaultKafkaConsumerFactory.createConsumer(DefaultKafkaConsumerFactory.java:)
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.<init>(KafkaMessageListenerContainer.java:)
    at org.springframework.kafka.listener.KafkaMessageListenerContainer.doStart(KafkaMessageListenerContainer.java:)
    at org.springframework.kafka.listener.AbstractMessageListenerContainer.start(AbstractMessageListenerContainer.java:)
    at org.springframework.kafka.listener.ConcurrentMessageListenerContainer.doStart(ConcurrentMessageListenerContainer.java:)
    at org.springframework.kafka.listener.AbstractMessageListenerContainer.start(AbstractMessageListenerContainer.java:)
    at org.springframework.kafka.config.KafkaListenerEndpointRegistry.startIfNecessary(KafkaListenerEndpointRegistry.java:)
    at org.springframework.kafka.config.KafkaListenerEndpointRegistry.start(KafkaListenerEndpointRegistry.java:)
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:)
    at org.springframework.context.support.DefaultLifecycleProcessor.access$(DefaultLifecycleProcessor.java:)
    at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:)
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:)
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:)
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:)
    at org.springframework.boot.web.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:)
    at org.springframework.boot.web.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:)
    at org.springframework.boot.web.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:)
    at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:)
    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:)
    at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:)
    at java.util.concurrent.FutureTask.run(FutureTask.java:)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:)
    at java.lang.Thread.run(Thread.java:)

不用管它 ， 一会儿就好了。