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sam liu commented on YARN-995: ------------------------------ I encountered similar issue on Hadoop-2.0.4-alpha > "WebAppException" is thrown in appmaster logs if any task got failed > -------------------------------------------------------------------- > > Key: YARN-995 > URL: https://issues.apache.org/jira/browse/YARN-995 > Project: Hadoop YARN > Issue Type: Bug > Affects Versions: 2.0.5-alpha > Reporter: Nishan Shetty > > {code} > 2013-07-30 14:49:42,521 INFO [IPC Server handler 13 on 31627] > org.apache.hadoop.mapred.TaskAttemptListenerImpl: MapCompletionEvents request > from attempt_1375161249957_0022_r_000279_0. startIndex 1002 maxEvents 3000 > 2013-07-30 14:49:42,865 INFO [IPC Server handler 19 on 31627] > org.apache.hadoop.mapred.TaskAttemptListenerImpl: MapCompletionEvents request > from attempt_1375161249957_0022_r_000278_0. startIndex 1002 maxEvents 3000 > 2013-07-30 14:49:42,876 INFO [IPC Server handler 23 on 31627] > org.apache.hadoop.mapred.TaskAttemptListenerImpl: MapCompletionEvents request > from attempt_1375161249957_0022_r_000280_0. startIndex 1002 maxEvents 3000 > 2013-07-30 14:49:42,904 ERROR [2065027703@qtp-1099518668-8] > org.apache.hadoop.mapreduce.v2.app.webapp.AppController: Failed to render > attempts page with task type : r for job id : job_1375161249957_0022 > org.apache.hadoop.yarn.webapp.WebAppException: Error rendering block: > nestLevel=6 expected 5 > at > org.apache.hadoop.yarn.webapp.view.HtmlBlock.render(HtmlBlock.java:66) > at > org.apache.hadoop.yarn.webapp.view.HtmlBlock.renderPartial(HtmlBlock.java:74) > at org.apache.hadoop.yarn.webapp.View.render(View.java:233) > at > org.apache.hadoop.yarn.webapp.view.HtmlPage$Page.subView(HtmlPage.java:47) > at > org.apache.hadoop.yarn.webapp.hamlet.HamletImpl$EImp._v(HamletImpl.java:117) > at org.apache.hadoop.yarn.webapp.hamlet.Hamlet$TD._(Hamlet.java:843) > at > org.apache.hadoop.yarn.webapp.view.TwoColumnLayout.render(TwoColumnLayout.java:54) > at org.apache.hadoop.yarn.webapp.view.HtmlPage.render(HtmlPage.java:80) > at org.apache.hadoop.yarn.webapp.Controller.render(Controller.java:210) > at > org.apache.hadoop.mapreduce.v2.app.webapp.AppController.attempts(AppController.java:290) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.apache.hadoop.yarn.webapp.Dispatcher.service(Dispatcher.java:150) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) > at > com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:263) > at > com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:178) > at > com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:91) > at > com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:62) > at > com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:900) > at > com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:834) > at > com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:795) > at > com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:163) > at > com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58) > at > com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:118) > at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:113) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) > at > org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter.doFilter(AmIpFilter.java:123) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) > at > org.apache.hadoop.util.IpValidationFilter.doFilter(IpValidationFilter.java:77) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) > at > org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:1085) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) > at org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) > at > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399) > at > org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) > at > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) > at > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450) > at > org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) > at > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) > at org.mortbay.jetty.Server.handle(Server.java:326) > at > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) > at > org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928) > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549) > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) > at > org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410) > at > org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) > 2013-07-30 14:49:42,937 INFO [IPC Server handler 17 on 31627] > org.apache.hadoop.mapred.TaskAttemptListenerImpl: Ping from > 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