[
https://issues.apache.org/jira/browse/YARN-6603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16011255#comment-16011255
]
Jason Lowe commented on YARN-6603:
----------------------------------
{noformat}
ERROR webapp.Dispatcher: error handling URI: /cluster
java.lang.NullPointerException
at
org.apache.hadoop.yarn.server.resourcemanager.webapp.RMAppsBlock.renderData(RMAppsBlock.java:101)
at
org.apache.hadoop.yarn.server.webapp.AppsBlock.render(AppsBlock.java:140)
at
org.apache.hadoop.yarn.webapp.view.HtmlBlock.render(HtmlBlock.java:69)
at
org.apache.hadoop.yarn.webapp.view.HtmlBlock.renderPartial(HtmlBlock.java:79)
at org.apache.hadoop.yarn.webapp.View.render(View.java:235)
at
org.apache.hadoop.yarn.webapp.view.HtmlBlock$Block.subView(HtmlBlock.java:43)
at org.apache.hadoop.yarn.webapp.hamlet.Hamlet._(Hamlet.java:30354)
at
org.apache.hadoop.yarn.server.resourcemanager.webapp.AppsBlockWithMetrics.render(AppsBlockWithMetrics.java:30)
at
org.apache.hadoop.yarn.webapp.view.HtmlBlock.render(HtmlBlock.java:69)
at
org.apache.hadoop.yarn.webapp.view.HtmlBlock.renderPartial(HtmlBlock.java:79)
at org.apache.hadoop.yarn.webapp.View.render(View.java:235)
at
org.apache.hadoop.yarn.webapp.view.HtmlPage$Page.subView(HtmlPage.java:49)
at
org.apache.hadoop.yarn.webapp.hamlet.HamletImpl$EImp._v(HamletImpl.java:117)
at org.apache.hadoop.yarn.webapp.hamlet.Hamlet$TD._(Hamlet.java:848)
at
org.apache.hadoop.yarn.webapp.view.TwoColumnLayout.render(TwoColumnLayout.java:71)
at org.apache.hadoop.yarn.webapp.view.HtmlPage.render(HtmlPage.java:82)
at org.apache.hadoop.yarn.webapp.Dispatcher.render(Dispatcher.java:206)
at org.apache.hadoop.yarn.webapp.Dispatcher.service(Dispatcher.java:165)
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
org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebAppFilter.doFilter(RMWebAppFilter.java:178)
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$CachedChain.doFilter(ServletHandler.java:1212)
at yjava.servlet.filter.BouncerFilter.doFilter(BouncerFilter.java:217)
at
com.yahoo.hadoop.HadoopBouncerFilter.doFilter(HadoopBouncerFilter.java:108)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at
org.apache.hadoop.security.http.CrossOriginFilter.doFilter(CrossOriginFilter.java:95)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.mortbay.servlet.UserAgentFilter.doFilter(UserAgentFilter.java:78)
at com.yahoo.hadoop.GzipFilter.doFilter(GzipFilter.java:197)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at
org.apache.hadoop.http.HttpServer2$QuotingInputFilter.doFilter(HttpServer2.java:1350)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)
at
org.mortbay.jetty.servlet.ServletHandler$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.HandlerCollection.handle(HandlerCollection.java:114)
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)
{noformat}
This looks similar to the problem YARN-4763 was trying to solve, but it must be
a different scenario since that fix is already in 2.8.0.
> NPE in RMAppsBlock
> ------------------
>
> Key: YARN-6603
> URL: https://issues.apache.org/jira/browse/YARN-6603
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.8.0
> Reporter: Jason Lowe
>
> We are seeing an intermittent NPE when the RM is trying to render the
> /cluster URI.
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