javax.websocket.Session的一个close异常记录

最新推荐文章于 2025-05-28 16:32:07 发布

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在使用WebSocket与Tomcat 8.x交互时，遇到客户端关闭连接后服务器端抛出'Cannot obtain idempotent information from Session in onError method after session closed'的异常。该异常与WEBSOCKET_SPEC-174问题相关，即使尝试捕获异常也无法避免。

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在使用C websocket客户端向Tomcat 8.x的websocket服务器发送消息时，当客户端关闭连接后，tomcat会出现如下异常，即使捕捉异常也无济于事。

异常：

十二月 10, 2015 4:38:07 下午 org.apache.tomcat.websocket.pojo.PojoEndpointBase onError
严重: No error handling configured for [com.bjsxt.socket.Echo] and the following error occurred
java.io.IOException: java.util.concurrent.ExecutionException: java.nio.channels.ClosedChannelException
	at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.startMessageBlock(WsRemoteEndpointImplBase.java:282)
	at org.apache.tomcat.websocket.WsSession.sendCloseMessage(WsSession.java:584)
	at org.apache.tomcat.websocket.WsSession.onClose(WsSession.java:520)
	at org.apache.tomcat.websocket.WsFrameBase.processDataControl(WsFrameBase.java:342)
	at org.apache.tomcat.websocket.WsFrameBase.processData(WsFrameBase.java:284)
	at org.apache.tomcat.websocket.WsFrameBase.processInputBuffer(WsFrameBase.java:130)
	at org.apache.tomcat.websocket.server.WsFrameServer.onDataAvailable(WsFrameServer.java:60)
	at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler$WsReadListener.onDataAvailable(WsHttpUpgradeHandler.java:183)
	at org.apache.coyote.http11.upgrade.AbstractServletInputStream.onDataAvailable(AbstractServletInputStream.java:198)
	at org.apache.coyote.http11.upgrade.AbstractProcessor.upgradeDispatch(AbstractProcessor.java:96)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:669)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:744)
Caused by: java.util.concurrent.ExecutionException: java.nio.channels.ClosedChannelException
	at org.apache.tomcat.websocket.FutureToSendHandler.get(FutureToSendHandler.java:102)
	at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.startMessageBlock(WsRemoteEndpointImplBase.java:275)
	... 16 more
Caused by: java.nio.channels.ClosedChannelException
	at sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:265)
	at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:474)
	at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:124)
	at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:183)
	at org.apache.coyote.http11.upgrade.NioServletOutputStream.doWriteInternal(NioServletOutputStream.java:94)
	at org.apache.coyote.http11.upgrade.NioServletOutputStream.doWrite(NioServletOutputStream.java:61)
	at org.apache.coyote.http11.upgrade.AbstractServletOutputStream.writeInternal(AbstractServletOutputStream.java:165)
	at org.apache.coyote.http11.upgrade.AbstractServletOutputStream.write(AbstractServletOutputStream.java:132)
	at org.apache.tomcat.websocket.server.WsRemoteEndpointImplServer.onWritePossible(WsRemoteEndpointImplServer.java:98)
	at org.apache.tomcat.websocket.server.WsRemoteEndpointImplServer.doWrite(WsRemoteEndpointImplServer.java:80)
	at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.writeMessagePart(WsRemoteEndpointImplBase.java:450)
	at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.startMessage(WsRemoteEndpointImplBase.java:338)
	at org.apache.tomcat.websocket.WsRemoteEndpointImplBase.startMessageBlock(WsRemoteEndpointImplBase.java:270)
	... 16 more

找到了一个BUG发布帖子：

Cannot obtain idempotent information from Session in onError method after session closed

https://java.net/jira/browse/WEBSOCKET_SPEC-174