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这篇文章主要讲解了“java启动时报线程占用报错Exception in thread “Thread-14“怎么解决”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“java启动时报线程占用报错Exception in thread “Thread-14“怎么解决”吧！
启动项目后抛出异常，但是奇怪的是执行器在任务调度中心中注册成功，也能成功执行
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( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
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:: Spring Boot :: (v2.2.2.RELEASE)
2023-02-14 11:22:15.516 INFO 4436 --- [ main] com.jxj.SafetyWebserverApplication : Starting SafetyWebserverApplication on abc with PID 4436 (C:\project\safetyproduction_collectdata\target\classes started by whx in C:\project\safetyproduction_collectdata)
2023-02-14 11:22:15.521 INFO 4436 --- [ main] com.jxj.SafetyWebserverApplication : No active profile set, falling back to default profiles: default
2023-02-14 11:22:16.722 INFO 4436 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
....
2023-02-14 11:22:19.191 INFO 4436 --- [ main] o.s.s.c.ThreadPoolTaskScheduler : Initializing ExecutorService 'taskScheduler'
2023-02-14 11:22:19.394 INFO 4436 --- [ main] com.jxj.config.XxlJobConfig : >>>>>>>>>>> xxl-job config init.
2023-02-14 11:22:19.666 INFO 4436 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2023-02-14 11:22:20.271 INFO 4436 --- [ main] c.xxl.job.core.executor.XxlJobExecutor : >>>>>>>>>>> xxl-job register jobhandler success, name:demoJobHandler, jobHandler:com.xxl.job.core.handler.impl.MethodJobHandler@c6bf8d9[class com.jxj.task.WarningTask#demoJobHandler]
2023-02-14 11:22:20.585 INFO 4436 --- [ main] o.s.i.endpoint.EventDrivenConsumer : Adding {logging-channel-adapter:_org.springframework.integration.errorLogger} as a subscriber to the 'errorChannel' channel
2023-02-14 11:22:20.586 INFO 4436 --- [ main] o.s.i.channel.PublishSubscribeChannel : Channel 'application.errorChannel' has 1 subscriber(s).
2023-02-14 11:22:20.586 INFO 4436 --- [ main] o.s.i.endpoint.EventDrivenConsumer : started bean '_org.springframework.integration.errorLogger'
2023-02-14 11:22:20.586 INFO 4436 --- [ main] o.s.i.endpoint.EventDrivenConsumer : Adding {message-handler:mqttPublisherConfig.mqttOutbound.serviceActivator} as a subscriber to the 'mqttOutboundChannel' channel
2023-02-14 11:22:20.586 INFO 4436 --- [ main] o.s.integration.channel.DirectChannel : Channel 'application.mqttOutboundChannel' has 1 subscriber(s).
2023-02-14 11:22:20.600 INFO 4436 --- [ main] o.s.i.endpoint.EventDrivenConsumer : started bean 'mqttPublisherConfig.mqttOutbound.serviceActivator'
2023-02-14 11:22:20.600 INFO 4436 --- [ main] o.s.i.endpoint.EventDrivenConsumer : Adding {message-handler:mqttSenderConfig.mqttOutbound.serviceActivator} as a subscriber to the 'mqttOutboundChannel1' channel
2023-02-14 11:22:20.601 INFO 4436 --- [ main] o.s.integration.channel.DirectChannel : Channel 'application.mqttOutboundChannel1' has 1 subscriber(s).
2023-02-14 11:22:20.601 INFO 4436 --- [ main] o.s.i.endpoint.EventDrivenConsumer : started bean 'mqttSenderConfig.mqttOutbound.serviceActivator'
2023-02-14 11:22:20.601 INFO 4436 --- [ main] o.s.i.endpoint.EventDrivenConsumer : Adding {message-handler:mqttSubscriberConfig.handler.serviceActivator} as a subscriber to the 'mqttInboundChannel' channel
2023-02-14 11:22:20.601 INFO 4436 --- [ main] o.s.integration.channel.DirectChannel : Channel 'application.mqttInboundChannel' has 1 subscriber(s).
2023-02-14 11:22:20.601 INFO 4436 --- [ main] o.s.i.endpoint.EventDrivenConsumer : started bean 'mqttSubscriberConfig.handler.serviceActivator'
2023-02-14 11:22:20.601 INFO 4436 --- [ main] ProxyFactoryBean$MethodInvocationGateway : started bean 'mqttGateway'
2023-02-14 11:22:20.601 INFO 4436 --- [ main] ProxyFactoryBean$MethodInvocationGateway : started bean 'mqttGateway'
2023-02-14 11:22:20.601 INFO 4436 --- [ main] ProxyFactoryBean$MethodInvocationGateway : started bean 'mqttGateway'
2023-02-14 11:22:20.601 INFO 4436 --- [ main] o.s.i.gateway.GatewayProxyFactoryBean : started bean 'mqttGateway'
Exception in thread "Thread-17" java.net.BindException: Address already in use: bind
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:433)
at sun.nio.ch.Net.bind(Net.java:425)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
at io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:134)
at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:551)
at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1346)
at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:503)
at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:488)
at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:985)
at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:247)
at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:344)
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute$$$capture(AbstractEventExecutor.java:163)
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:510)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:518)
at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
2023-02-14 11:22:21.444 INFO 4436 --- [ main] .m.i.MqttPahoMessageDrivenChannelAdapter : started bean 'inbound'; defined in: 'class path resource [com/jxj/config/MqttSubscriberConfig.class]'; from source: 'org.springframework.core.type.classreading.SimpleMethodMetadata@1d4664d7'
2023-02-14 11:22:21.446 INFO 4436 --- [ main] o.s.a.r.c.CachingConnectionFactory : Attempting to connect to: [localhost:5672]
2023-02-14 11:22:25.537 INFO 4436 --- [ main] o.s.a.r.l.SimpleMessageListenerContainer : Broker not available; cannot force queue declarations during start: java.net.ConnectException: Connection refused: connect
2023-02-14 11:22:25.545 INFO 4436 --- [ntContainer#0-1] o.s.a.r.c.CachingConnectionFactory : Attempting to connect to: [localhost:5672]网上有的说通过
在低版本的 xxl-job 中， 初始化XxlJobSpringExecutor执行器需要在@Bean中加上 initMethod = "start", destroyMethod = "destroy"，但是在高版本的 xxl-job（如 2.1.2）则需要删除 initMethod = "start", destroyMethod = "destroy"
而我的问题不是在bean上加(initMethod = “start”, destroyMethod = “destroy”)，我加上之后会报两遍线程被使用的异常。
Exception in thread "Thread-14" java.net.BindException: Address already in use: bind at sun.nio.ch.Net.bind0(Native Method) at sun.nio.ch.Net.bind(Net.java:433) at sun.nio.ch.Net.bind(Net.java:425) at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) at io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:134) at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:551) at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1346) at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:503) at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:488) at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:985) at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:247) at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:344) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute$$$capture(AbstractEventExecutor.java:163) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:510) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:518) at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:748) 2023-02-14 11:25:20.568 INFO 18140 --- [ main] c.xxl.job.core.executor.XxlJobExecutor : >>>>>>>>>>> xxl-job register jobhandler success, name:demoJobHandler, jobHandler:com.xxl.job.core.handler.impl.MethodJobHandler@1618c98a[class com.jxj.task.WarningTask#demoJobHandler] Exception in thread "Thread-20" java.net.BindException: Address already in use: bind at sun.nio.ch.Net.bind0(Native Method) at sun.nio.ch.Net.bind(Net.java:433) at sun.nio.ch.Net.bind(Net.java:425) at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) at io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:134) at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:551) at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1346) at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:503) at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:488) at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:985) at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:247) at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:344) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute$$$capture(AbstractEventExecutor.java:163) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:510) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:518) at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:748)
//原注解：
@Bean
public XxlJobSpringExecutor xxlJobExecutor() {
...
}
//修改后注解
@Bean(initMethod = "start", destroyMethod = "destroy")
public XxlJobSpringExecutor xxlJobExecutor() {
...
}后来我发现我的问题是 本地和线上的程序连接了相同的xxl-job，并且连接xxl-job的端口是一样的，导致了这个问题！
xxl: job: accessToken: xxx admin: # addresses: http://1xxxxx/xxl-job-admin addresses: http://39xxxxx/xxl-job-admin executor: address: 'xxx' appname: safexxxxxst #这个名字要和页面配置的一致 ip: '' logpath: /datxxxxjob/joxxxler logretentiondays: 30 port: 9996
就是这个 port端口重复导致的问题修改一下即可
port: 9996
本来我是第二种情况已经解决了，结果下午又报这个错了，因此有了第三种情况的解决。
启动报错时的 错误关键日志：
2023-02-14 13:59:12.074 INFO 8364 --- [ main] o.s.a.r.c.CachingConnectionFactory : Created new connection: rabbitConnectionFactory#131ba005:0/SimpleConnection@5981f2c6 [delegate=amqp://root@127.0.0.1:5673/, localPort= 5415] Exception in thread "Thread-21" java.net.BindException: Address already in use: bind at sun.nio.ch.Net.bind0(Native Method) at sun.nio.ch.Net.bind(Net.java:433) at sun.nio.ch.Net.bind(Net.java:425) at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) at io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:134) at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:551) at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1346) at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:503) at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:488) at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:985) at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:247) at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:344) at
由于我已经解决过一次，所以我对端口比较敏感（大家看完后面的分析就可以知道我为什么敏感），就在yaml文件种搜了一下所有的 port 一共有五处。
排除项目的port（项目的接口冲突会直接报错，停止运行）
排除xxl-job （第二种情况冲突已经解决）
剩下的是集成的 redis，elasticsearch，rabbitmq
redis和elasticsearch我都没有开启，问题就只在rabbitmq了。
rabbitmq我是本地起的docker，来连接测试的。
然后我有认真看了一下日志，就是上面贴出来的第一行
[delegate=amqp://root@127.0.0.1:5673/, localPort= 5415]
也就是打印完这个日志后报的错误，localPort= 5415，于是我又在本地查看了一下这个5415端口使用情况
netstat -aon|findstr 5415
果然 两个不同的线程在用!
C:\Uxxxs\1xx0>netstat -aon|findstr 5415 TCP 127.0.0.1:5415 127.0.0.1:5673 ESTABLISHED 8364 TCP 127.0.0.1:5673 127.0.0.1:5415 ESTABLISHED 4136
然后我打开任务管理器 详细信息，找到4136是daocker
我重启了一下电脑，，解决了
程序启动之后重新启动了一个线程去连接xxl-job的端口，但是这个端口已经被占用了，所以程序就直接返回了一个这个线程被占用了。
服务创建监听的时候，如果端口有LISTENING、ESTABLISHED、TIME_WAIT等，好像都会报错。 可以研究下原理
TCP状态转移要点
TCP协议规定，对于已经建立的连接，网络双方要进行四次握手才能成功断开连接，如果缺少了其中某个步骤，将会使连接处于假死状态，连接本身占用的资源不会被释放。网络服务器程序要同时管理大量连接，所以很有必要保证无用连接完全断开，否则大量僵死的连接会浪费许多服务器资源。在众多TCP状态中，最值得注意的状态有两个：CLOSE_WAIT和TIME_WAIT。
1、LISTENING状态
FTP服务启动后首先处于侦听（LISTENING）状态。
2、ESTABLISHED状态
ESTABLISHED的意思是建立连接。表示两台机器正在通信。
3、TIME_WAIT
我方主动调用close()断开连接，收到对方确认后状态变为TIME_WAIT。TCP协议规定TIME_WAIT状态会一直持续2MSL(即两倍的分段最大生存期)，以此来确保旧的连接状态不会对新连接产生影响。处于TIME_WAIT状态的连接占用的资源不会被内核释放，所以作为服务器，在可能的情况下，尽量不要主动断开连接，以减少TIME_WAIT状态造成的资源浪费。
目前有一种避免TIME_WAIT资源浪费的方法，就是关闭socket的LINGER选项。但这种做法是TCP协议不推荐使用的，在某些情况下这个操作可能会带来错误。
感谢各位的阅读，以上就是“java启动时报线程占用报错Exception in thread “Thread-14“怎么解决”的内容了，经过本文的学习后，相信大家对java启动时报线程占用报错Exception in thread “Thread-14“怎么解决这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是亿速云，小编将为大家推送更多相关知识点的文章，欢迎关注！
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