[ 
https://issues.apache.org/jira/browse/YARN-3582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14529792#comment-14529792
 ] 

Hadoop QA commented on YARN-3582:
---------------------------------

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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  14m 41s | Pre-patch trunk compilation is 
healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any 
@author tags. |
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to 
include 1 new or modified test files. |
| {color:green}+1{color} | javac |   7m 33s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 34s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 23s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   0m 29s | 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 35s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 33s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   0m 37s | The patch does not introduce 
any new Findbugs (version 2.0.3) warnings. |
| {color:green}+1{color} | yarn tests |   0m 27s | Tests passed in 
hadoop-yarn-server-web-proxy. |
| | |  35m 55s | |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12730674/YARN-3582.1.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 90b3845 |
| hadoop-yarn-server-web-proxy test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/7722/artifact/patchprocess/testrun_hadoop-yarn-server-web-proxy.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/7722/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf902.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/7722/console |


This message was automatically generated.

> NPE in WebAppProxyServlet
> -------------------------
>
>                 Key: YARN-3582
>                 URL: https://issues.apache.org/jira/browse/YARN-3582
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Jian He
>            Assignee: Jian He
>         Attachments: YARN-3582.1.patch
>
>
> {code}
> HTTP ERROR 500
> Problem accessing /proxy. Reason:
> INTERNAL_SERVER_ERROR
> Caused by:
> java.lang.NullPointerException
> at 
> org.apache.hadoop.yarn.server.webproxy.WebAppProxyServlet.doGet(WebAppProxyServlet.java:245)
> 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:511)
> at 
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
> at 
> com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:66)
> at 
> com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:900)
> at 
> com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:834)
> at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebAppFilter.doFilter(RMWebAppFilter.java:84)
> at 
> com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:795)
> at 
> com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:163)
> at 
> com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:58)
> at 
> com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:118)
> at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:113)
> at 
> org.mortbay.jetty.servlet.ServletHandler$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.http.HttpServer2$QuotingInputFilter.doFilter(HttpServer2.java:1192)
> at 
> org.mortbay.jetty.servlet.ServletHandler$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.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)
> {code}



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