java 中 java.io.IOException: Broken pipe 是什么异常？

Question

org.apache.catalina.connector.ClientAbortException: java.io.IOException: Broken pipe
	at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:372)
	at org.apache.catalina.connector.OutputBuffer.appendByteArray(OutputBuffer.java:811)
	at org.apache.catalina.connector.OutputBuffer.append(OutputBuffer.java:740)
	at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:407)
	at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:385)
	at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:96)
	at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:89)
	at service.BetaUser.doGet(BetaUser.java:46)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:626)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:544)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:616)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:831)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1634)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Broken pipe
	at sun.nio.ch.FileDispatcherImpl.write0(Native Method)
	at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:47)
	at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:93)
	at sun.nio.ch.IOUtil.write(IOUtil.java:65)
	at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:471)
	at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:136)
	at org.apache.tomcat.util.net.NioBlockingSelector.write(NioBlockingSelector.java:101)
	at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:157)
	at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1319)
	at org.apache.tomcat.util.net.SocketWrapperBase.doWrite(SocketWrapperBase.java:716)
	at org.apache.tomcat.util.net.SocketWrapperBase.writeBlocking(SocketWrapperBase.java:536)
	at org.apache.tomcat.util.net.SocketWrapperBase.write(SocketWrapperBase.java:480)
	at org.apache.coyote.http11.Http11OutputBuffer$SocketOutputBuffer.doWrite(Http11OutputBuffer.java:631)
	at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:121)
	at org.apache.coyote.http11.Http11OutputBuffer.doWrite(Http11OutputBuffer.java:228)
	at org.apache.coyote.Response.doWrite(Response.java:600)
	at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:360)
	... 31 more

Answer 1

一、Broken pipe产生原因分析

1.当访问某个服务突然服务器挂了，就会产生Broken pipe;

2.客户端读取超时关闭了连接，这时服务器往客户端再写数据就发生了broken pipe异常！

二、方案

1.问题一分析服务器为什么挂了。

2.问题二使用jps/jstack分析线程栈，看是不是有线程阻塞。

 

其实就是服务器扛不住请求了，所以把日志级别先调整到error然后项目重启。