java.io.IOException: Broken pipe

Question

We are currently migrating a legacy application to Jetty. And I have somehow an exception regarding a broken pipe.

• Java 6
• Jetty 8.1.8
• Spring 3.2.0

I am trying to migrate a Glassfish web application to Jetty. In our testing environment we are using a load balancer and everything is working fine. Our clients are working without any problem.

WARN  [2013-04-03 13:34:28,963] com.myapp.bbb.config.MvcDefaultConfig$1: Handler execution resulted in exception ! org.eclipse.jetty.io.EofException: null ! at org.eclipse.jetty.http.HttpGenerator.flushBuffer(HttpGenerator.java:914) ! at org.eclipse.jetty.http.HttpGenerator.complete(HttpGenerator.java:798) ! at org.eclipse.jetty.server.AbstractHttpConnection.completeResponse(AbstractHttpConnection.java:642) ! at org.eclipse.jetty.server.Response.complete(Response.java:1234) ! at org.eclipse.jetty.server.Response.sendError(Response.java:404) ! at org.eclipse.jetty.server.Response.sendError(Response.java:416) ! at org.springframework.web.servlet.DispatcherServlet.noHandlerFound(DispatcherServlet.java:1111) ! at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:898) ! at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) ! at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:915) ! at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:811) ! at javax.servlet.http.HttpServlet.service(HttpServlet.java:735) ! at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796) ! at javax.servlet.http.HttpServlet.service(HttpServlet.java:848) ! at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:669) ! at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1336) ! at com.magnetdigital.maggy.dropwizard.head2get.Head2GetFilter.doFilter(Head2GetFilter.java:22) ! at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1307) ! at com.yammer.dropwizard.servlets.ThreadNameFilter.doFilter(ThreadNameFilter.java:29) ! at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1307) ! at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:453) ! at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:229) ! at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1072) ! at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:382) ! at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) ! at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1006) ! at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) ! at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) ! at com.yammer.metrics.jetty.InstrumentedHandler.handle(InstrumentedHandler.java:200) ! at org.eclipse.jetty.server.handler.GzipHandler.handle(GzipHandler.java:275) ! at com.yammer.dropwizard.jetty.BiDiGzipHandler.handle(BiDiGzipHandler.java:123) ! at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:154) ! at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) ! at org.eclipse.jetty.server.Server.handle(Server.java:365) ! at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:485) ! at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53) ! at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926) ! at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988) ! at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:635) ! at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) ! at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72) ! at org.eclipse.jetty.server.nio.BlockingChannelConnector$BlockingChannelEndPoint.run(BlockingChannelConnector.java:298) ! at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) ! at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) ! at java.lang.Thread.run(Thread.java:662) Caused by: ! java.io.IOException: Broken pipe ! at sun.nio.ch.FileDispatcher.write0(Native Method) ! at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:29) ! at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:69) ! at sun.nio.ch.IOUtil.write(IOUtil.java:26) ! at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334) ! at org.eclipse.jetty.io.nio.ChannelEndPoint.flush(ChannelEndPoint.java:293) ! at org.eclipse.jetty.server.nio.BlockingChannelConnector$BlockingChannelEndPoint.flush(BlockingChannelConnector.java:253) ! at org.eclipse.jetty.http.HttpGenerator.flushBuffer(HttpGenerator.java:850) !... 44 common frames omitted 

When I check the stacktrace I have seen this exceptions are triggered by always a 404 request.

org.springframework.web.servlet.DispatcherServlet.noHandlerFound(DispatcherServlet.java:1111)

• Why am I having this exception?
• How can I reproduce this exception at my machine locally?

Answer 1

The most common reason I've had for a "broken pipe" is that one machine (of a pair communicating via socket) has shut down its end of the socket before communication was complete. About half of those were because the program communicating on that socket had terminated.

If the program sending bytes sends them out and immediately shuts down the socket or terminates itself, it is possible for the socket to cease functioning before the bytes have been transmitted and read.

Try putting pauses anywhere you are shutting down the socket and before you allow the program to terminate to see if that helps.

FYI: "pipe" and "socket" are terms that get used interchangeably sometimes.