EOFExceptionは常にリモートホストによって引き起こされますか？

Question

ソケットを介してホストにデータを送信するクライアントがあります。時々私はjava.io.EOFExceptionを得る。

質問です：どのように私はソケットのクローズを引き起こしたかを知ることができますか？リモートホストがソケットを閉じたため例外が常に発生しますか？

また、内部ネットワーク接続の問題でもありますか？または私のISPから？

org.springframework.messaging.MessagingException: Dispatcher failed to deliver Message; nested exception is org.springframework.messaging.MessagingException: Exception while awaiting reply; nested exception is java.io.EOFException: Connection is closed 
    at org.springframework.integration.dispatcher.AbstractDispatcher.wrapExceptionIfNecessary(AbstractDispatcher.java:133) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:120) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:148) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:121) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:89) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:423) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:373) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115) ~[spring-messaging-4.3.10.RELEASE.jar:4.3.10.RELEASE] 
    at org.springframework.messaging.core.GenericMessagingTemplate.doSendAndReceive(GenericMessagingTemplate.java:150) ~[spring-messaging-4.3.10.RELEASE.jar:4.3.10.RELEASE] 
    at org.springframework.messaging.core.GenericMessagingTemplate.doSendAndReceive(GenericMessagingTemplate.java:45) ~[spring-messaging-4.3.10.RELEASE.jar:4.3.10.RELEASE] 
    at org.springframework.messaging.core.AbstractMessagingTemplate.sendAndReceive(AbstractMessagingTemplate.java:42) ~[spring-messaging-4.3.10.RELEASE.jar:4.3.10.RELEASE] 
    at org.springframework.integration.core.MessagingTemplate.sendAndReceive(MessagingTemplate.java:97) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.core.MessagingTemplate.sendAndReceive(MessagingTemplate.java:38) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.messaging.core.AbstractMessagingTemplate.sendAndReceive(AbstractMessagingTemplate.java:37) ~[spring-messaging-4.3.10.RELEASE.jar:4.3.10.RELEASE] 
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_131] 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_131] 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_131] 
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131] 

Caused by: org.springframework.messaging.MessagingException: Exception while awaiting reply; nested exception is java.io.EOFException: Connection is closed 
    at org.springframework.integration.ip.tcp.TcpOutboundGateway$AsyncReply.getReply(TcpOutboundGateway.java:322) ~[spring-integration-ip-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.ip.tcp.TcpOutboundGateway.handleRequestMessage(TcpOutboundGateway.java:139) ~[spring-integration-ip-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler$AdvisedRequestHandler.handleRequestMessage(AbstractReplyProducingMessageHandler.java:178) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at sun.reflect.GeneratedMethodAccessor980.invoke(Unknown Source) ~[?:?] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_131] 
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_131] 
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333) ~[spring-aop-4.3.10.RELEASE.jar:4.3.10.RELEASE] 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) ~[spring-aop-4.3.10.RELEASE.jar:4.3.10.RELEASE] 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.10.RELEASE.jar:4.3.10.RELEASE] 
    at org.springframework.integration.handler.advice.AbstractRequestHandlerAdvice$1.execute(AbstractRequestHandlerAdvice.java:75) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.handler.advice.AbstractRequestHandlerAdvice.invoke(AbstractRequestHandlerAdvice.java:70) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.10.RELEASE.jar:4.3.10.RELEASE] 
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) ~[spring-aop-4.3.10.RELEASE.jar:4.3.10.RELEASE] 
    at com.sun.proxy.$Proxy1241.handleRequestMessage(Unknown Source) ~[?:?] 
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.doInvokeAdvisedRequestHandler(AbstractReplyProducingMessageHandler.java:127) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:112) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116) ~[spring-integration-core-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    ... 21 more 

Caused by: java.io.EOFException: Connection is closed 
    at org.springframework.integration.ip.tcp.connection.AbstractConnectionFactory$1.run(AbstractConnectionFactory.java:682) ~[spring-integration-ip-4.3.11.RELEASE.jar:4.3.11.RELEASE] 
    ... 3 more 

Answer 1

質問です：どのように私はソケットのクローズを引き起こしたかを知ることができますか？リモートホストが接続を終了したために例外は常に発生しますか？

はい。それ以外の場合は、はになります。接続のリセットまたはタイムアウトの読み取りが発生します。これがJREクラス自身の動作です。

ただし、エラーメッセージの文言は有望ではありません。 'Connection is closed'は、ローカルアプリケーションによって閉じられた接続を使用している場合、誤って使用しているライブラリがEOFExceptionをスローする可能性があります。ソースコードを確認して確認する必要があります。