Not sure , what is happening here .. in the sense that is this critical?
I had read that the status of a task is passed on to the jobtracker over
http.
Is that true ?
I see tasks killed b'coz of expiree , even though the Datanode seems to be
alive and kicking ( expect for the above exception )..
Is there any relation?
2010-04-27 14:51:47,334 WARN org.mortbay.log: Committed before 410
getMapOutput(attempt_201004271342_0001_m_001281_0,49) failed :
org.mortbay.jetty.EofException
at org.mortbay.jetty.HttpGenerator.flush(HttpGenerator.java:787)
at
org.mortbay.jetty.AbstractGenerator$Output.flush(AbstractGenerator.java:566)
at
org.mortbay.jetty.HttpConnection$Output.flush(HttpConnection.java:946)
at
org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:646)
at
org.mortbay.jetty.AbstractGenerator$Output.write(AbstractGenerator.java:577)
at
org.apache.hadoop.mapred.TaskTracker$MapOutputServlet.doGet(TaskTracker.java:2943)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:363)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)
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:104)
at sun.nio.ch.IOUtil.write(IOUtil.java:75)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334)
at org.mortbay.io.nio.ChannelEndPoint.flush(ChannelEndPoint.java:169)
at
org.mortbay.io.nio.SelectChannelEndPoint.flush(SelectChannelEndPoint.java:221)
at org.mortbay.jetty.HttpGenerator.flush(HttpGenerator.java:721)
... 23 more
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