Java Blog精粹:被SocketException折磨了三天[库库中文网]-系统编程教程 QQGB.com

最近开发一网站，在本地测试通过后放到购买的空间上，运行不到二天。空间的客服就和我说，我们的网站有问题，老是报错，并且停止了网站的运行。其报错内容如下：

警告: Exception Processing ErrorPage[errorCode=404, location=/404.jsp]
ClientAbortException: java.net.SocketException: Connection reset by peer: socket write error
     at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:366)
     at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:403)
     at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:311)
     at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:293)
     at org.apache.catalina.connector.Response.flushBuffer(Response.java:544)
     at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:286)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
     at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
     at java.lang.Thread.run(Thread.java:595)
Caused by: java.net.SocketException: Connection reset by peer: socket write error
     at java.net.SocketOutputStream.socketWrite0(Native Method)
     at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
     at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
     at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:747)
     at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:403)
     at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:323)
     at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:770)
     at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:125)
     at org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:580)
     at org.apache.coyote.Response.doWrite(Response.java:555)
     at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:361)
     ... 15 more
2006-6-22 15:39:29 org.apache.catalina.core.StandardHostValve status
警告: Exception Processing ErrorPage[errorCode=404, location=/404.jsp]
ClientAbortException: java.net.SocketException: Connection reset by peer: socket write error
     at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:366)
     at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:403)
     at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:311)
     at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:293)
     at org.apache.catalina.connector.Response.flushBuffer(Response.java:544)
     at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:286)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868)
     at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663)
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
     at java.lang.Thread.run(Thread.java:595)
Caused by: java.net.SocketException: Connection reset by peer: socket write error
     at java.net.SocketOutputStream.socketWrite0(Native Method)
     at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
     at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
     at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:747)
     at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:403)
     at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:323)
     at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:770)
     at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:125)
     at org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:580)
     at org.apache.coyote.Response.doWrite(Response.java:555)
     at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:361)
     ... 15 more

以前也曾经遇到过ClientAbortException: java.net.SocketException: Connection reset by peer: socket write error的问题，但是造成这个错误的各种原因不一样。

第一步，为了找出出错的原因，我在几台机器上测试，结果，终于在有一台机器上运行会出现那样的问题。

第二步，为了找出真正出错的代码，我将所有在jsp页面用到的处理数据代码删掉，结果运行正常，不再报那个错，这个说明问题应该在jsp页面。

第三步，由于我在jsp页面中直接用一个类通过spring和hibernate查询得到结果，没有用到struts.因此，我修改代码，将所有查询放到一个action里面，然后再用request.setAttribute()保存查询结果。再jsp页面直接用request.getAttribute取得结果。这样，再次运行，第一次页面显示正常，并且后台也不报错。于是我认为，问题已经解决。

但是，运行几次以后，打开几个新的同一个页面后，后台又开始报同样的错误了,晕~~~~

第四步，为了确定问题的根源在哪里，我修改了VO,添加了implements Serializable,实现了Serializable接口。结果运行，这次是第一次运行后台就报错

第五步，我打开所有调试信息，结果发现每次action执行结束后，我都会用decorator，就是用装时器装饰一下页面，于是开始想，会不会是action执行结束后，再运行 "装饰器" 的那个过滤程序，结果造成session过期，从而导致那个问题。于是尝试不用装饰器去装饰那个页面。第一次运行正常。为了测试是否问题真正解决，我新开了10个ie窗口，在各个页面轮流刷新页面，在刷新了 100 多下后，发现后台还没有报错，初步确定问题已经解决！

但是，造成这个问题的内在原因还是不清楚！