[ 
https://issues.apache.org/jira/browse/YARN-4204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14905735#comment-14905735
 ] 

Hadoop QA commented on YARN-4204:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  17m 38s | Pre-patch trunk compilation is 
healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any 
@author tags. |
| {color:red}-1{color} | tests included |   0m  0s | The patch doesn't appear 
to include any new or modified tests.  Please justify why no new tests are 
needed for this patch. Also please list what manual steps were performed to 
verify this patch. |
| {color:green}+1{color} | javac |   8m  6s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |  10m 25s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 27s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   0m 52s | There were no new checkstyle 
issues. |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 34s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 35s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   1m 30s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | yarn tests |  61m  6s | Tests passed in 
hadoop-yarn-server-resourcemanager. |
| | | 102m 18s | |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12762026/YARN-4204.001.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 1f707ec |
| hadoop-yarn-server-resourcemanager test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/9249/artifact/patchprocess/testrun_hadoop-yarn-server-resourcemanager.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/9249/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf909.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP 
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | 
https://builds.apache.org/job/PreCommit-YARN-Build/9249/console |


This message was automatically generated.

> ConcurrentModificationException in FairSchedulerQueueInfo
> ---------------------------------------------------------
>
>                 Key: YARN-4204
>                 URL: https://issues.apache.org/jira/browse/YARN-4204
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Anubhav Dhoot
>            Assignee: Anubhav Dhoot
>         Attachments: YARN-4204.001.patch
>
>
> Saw this exception
> {noformat}
> java.util.ConcurrentModificationException
>       at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
>       at java.util.ArrayList$Itr.next(ArrayList.java:851)
>       at 
> java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1042)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.FairSchedulerQueueInfo.<init>(FairSchedulerQueueInfo.java:100)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.FairSchedulerInfo.<init>(FairSchedulerInfo.java:46)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebServices.getSchedulerInfo(RMWebServices.java:229)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:497)
>       at 
> com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
>       at 
> com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
>       at 
> com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
>       at 
> com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
>       at 
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
>       at 
> com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
>       at 
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
>       at 
> com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
>       at 
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469)
>       at 
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400)
>       at 
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)
>       at 
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)
>       at 
> com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
>       at 
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
>       at 
> com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:886)
>       at 
> com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:834)
>       at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebAppFilter.doFilter(RMWebAppFilter.java:84)
>       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$CachedChain.doFilter(ServletHandler.java:1212)
>       at 
> org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:109)
>       at 
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>       at 
> org.apache.hadoop.security.authentication.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:589)
>       at 
> org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticationFilter.doFilter(DelegationTokenAuthenticationFilter.java:291)
>       at 
> org.apache.hadoop.security.authentication.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:552)
>       at 
> org.apache.hadoop.yarn.server.security.http.RMAuthenticationFilter.doFilter(RMAuthenticationFilter.java:84)
>       at 
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>       at 
> org.apache.hadoop.http.HttpServer2$QuotingInputFilter.doFilter(HttpServer2.java:1279)
>       at 
> org.mortbay.jetty.servlet.ServletHandler$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:767)
>       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)
> {noformat}



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