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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13555) StackServlet produces 500 error
Date Fri, 24 Apr 2015 19:01:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14511552#comment-14511552
] 

Hadoop QA commented on HBASE-13555:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12727947/13555-v1.txt
  against master branch at commit 4c97d4b244c854ddbb302ecf733a8c4890cd4b69.
  ATTACHMENT ID: 12727947

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  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 hadoop versions{color}. The patch compiles with all supported hadoop versions
(2.4.1 2.5.2 2.6.0)

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 protoc{color}.  The applied patch does not increase the total number of
protoc compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 checkstyle{color}.  The applied patch does not increase the total number
of checkstyle errors

    {color:green}+1 findbugs{color}.  The patch does not introduce any  new Findbugs (version
2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

  {color:green}+1 site{color}.  The mvn site goal succeeds with this patch.

    {color:green}+1 core tests{color}.  The patch passed unit tests in .

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/13803//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13803//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/13803//artifact/patchprocess/checkstyle-aggregate.html

  Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/13803//console

This message is automatically generated.

> StackServlet produces 500 error
> -------------------------------
>
>                 Key: HBASE-13555
>                 URL: https://issues.apache.org/jira/browse/HBASE-13555
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.0.0
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.1.0, 1.0.2
>
>         Attachments: 13555-v1.txt
>
>
> Kent Baxley reported that accessing /stacks servlet gives 500 error code.
> Here is related stack trace:
> {code}
> 2015-04-24 15:50:17,762 ERROR [789466850@qtp-2077292073-18] mortbay.log: /stacks
> java.lang.IllegalStateException: WRITER
>         at org.mortbay.jetty.Response.getOutputStream(Response.java:594)
>         at org.apache.hadoop.hbase.http.HttpServer$StackServlet.doGet(HttpServer.java:1217)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>         at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
>         at org.apache.hadoop.hbase.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:113)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>         at org.apache.hadoop.hbase.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:1351)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>         at org.apache.hadoop.hbase.http.NoCacheFilter.doFilter(NoCacheFilter.java:49)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>         at org.apache.hadoop.hbase.http.NoCacheFilter.doFilter(NoCacheFilter.java:49)
>         at org.mortbay.jetty.servlet.ServletHandler$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)
> {code}
> While investigating this issue, I found that /dump servlet on master (which contains
stack trace) leaves the following NPE in master log:
> {code}
> 2015-04-24 15:58:53,896 ERROR [2078627178@qtp-2077292073-24] mortbay.log: /dump
> java.lang.NullPointerException
>         at org.apache.hadoop.hbase.regionserver.RSDumpServlet.dumpQueue(RSDumpServlet.java:106)
>         at org.apache.hadoop.hbase.master.MasterDumpServlet.doGet(MasterDumpServlet.java:105)
>         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$CachedChain.doFilter(ServletHandler.java:1221)
>         at org.apache.hadoop.hbase.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:113)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>         at org.apache.hadoop.hbase.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:1351)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>         at org.apache.hadoop.hbase.http.NoCacheFilter.doFilter(NoCacheFilter.java:49)
>         at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
>         at org.apache.hadoop.hbase.http.NoCacheFilter.doFilter(NoCacheFilter.java:49)
>         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)
> {code}



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