Connection reset by peer: socket write error

今天做了个过滤图片的servlet，功能是用来匹配自定义的文件后缀，如果是该后缀，则通过该文件的id到数据库的附件中将文件读出并将byte[]写入response的out流中，但经常会报错，初步排查原因是由于浏览器的Aborted，阻止了请求的响应，异常如下：

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:433)
        at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:348)

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:433)    
        at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:348)  

在BAIDU和GOOGLE上找了下原因，大概归结为：
ClientAbortException: java.net.SocketException: Connection reset by peer: socket write error的原因是由于处理http连接时，正在输出内容时，用户关闭了IE，会出现一个"ClientAbortException"，属于I/O处理中出现的一个异常，应用服务器应该会捕捉。
Connection reset by peer的原因：
经常出现的Connection reset by peer: 原因可能是多方面的，不过更常见的原因是：
①：服务器的并发连接数超过了其承载量，服务器会将其中一些连接Down掉；
②：客户关掉了浏览器，而服务器还在给客户端发送数据；
③：浏览器端按了Stop
很多人都说是客户端造成的，没有办法控制，是个比较郁闷的问题。

但是，我担心的是：虽然前台没有任何出错的迹象，但是后台会记录这个异常，日志也会疯狂爆满，时间长了，肯定会DOWN掉的，还没找到好的解决办法。

暂时HACK式的解决方法：
把下载文件的代码放在try……catch块中，在catch部分使用判断避免让系统抛出ClientAbortException,具体方法可以这样：

try{
...
}catch(Exception ex){
   String simplename = ex.getClass().getSimpleName();
   if(!"ClientAbortException".equals(simplename)){
         ex.printStackTrace();
    }
}

评论

1 楼 hw1287789687 2013-08-15  

ClientAbortException:  java.net.SocketException: Connection reset by peer: socket write error
at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:406)
at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:480)
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:352)
at org.apache.catalina.connector.OutputBuffer.close(OutputBuffer.java:303)
at org.apache.catalina.connector.CoyoteOutputStream.close(CoyoteOutputStream.java:108)
at org.apache.struts2.dispatcher.StreamResult.doExecute(StreamResult.java:305)
at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:374)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:278)
at com.tdr.mbs.core.http.interceptor.JSONWorkFlowInterceptor.intercept(JSONWorkFlowInterceptor.java:79)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.tdr.mbs.core.http.interceptor.JSONInterceptor.intercept(JSONInterceptor.java:78)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.tdr.mbs.endpoint.core.http.interceptor.TokenCheckInterceptor.intercept(TokenCheckInterceptor.java:68)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.tdr.mbs.endpoint.core.http.interceptor.HeaderParsingInterceptor.intercept(HeaderParsingInterceptor.java:57)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.tdr.mbs.core.http.interceptor.MbsExceptionInterceptor.intercept(MbsExceptionInterceptor.java:70)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:511)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
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:215)
at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:480)
at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:366)
at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:240)
at org.apache.coyote.http11.filters.IdentityOutputFilter.doWrite(IdentityOutputFilter.java:84)
at org.apache.coyote.http11.AbstractOutputBuffer.doWrite(AbstractOutputBuffer.java:192)
at org.apache.coyote.Response.doWrite(Response.java:505)
at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:401)
... 46 more