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https://issues.apache.org/jira/browse/HADOOP-6035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12719424#action_12719424
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Anjali M commented on HADOOP-6035:
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I've added a single queue and has not changed any defaluts. I'm using
hadoop-0.20.0. I used the capcity scheduler in contrib/ of hadoop. The fair
scheduler is working fine. The queues of capacity scheduler are also being
listed in the jobtrackerUI as long as namenode is in safemode. Once the
namenode goes out of the safemode the jobtracker gets stopped.
> jobtracker stops when namenode goes out of safemode runing capacit scheduler
> ----------------------------------------------------------------------------
>
> Key: HADOOP-6035
> URL: https://issues.apache.org/jira/browse/HADOOP-6035
> Project: Hadoop Core
> Issue Type: Bug
> Affects Versions: 0.20.0
> Environment: Fedora 10
> Reporter: Anjali M
> Priority: Minor
>
> I am facing a problem running the capacity scheduler in hadoop-0.20.0.
> The jobtracker is listing the queues when namenode is in the safemode.
> Once the namenode goes out of the safemode the jt stops working. On
> accessing jobqueue details it shows the following error.
> HTTP ERROR: 500
> INTERNAL_SERVER_ERROR
> RequestURI=/jobqueue_details.jsp
> Caused by:
> java.lang.NullPointerException
> at
> org.apache.hadoop.mapred.JobQueuesManager.getRunningJobQueue(JobQueuesManager.java:156)
> at
> org.apache.hadoop.mapred.CapacityTaskScheduler.getJobs(CapacityTaskScheduler.java:1495)
> at
> org.apache.hadoop.mapred.jobqueue_005fdetails_jsp._jspService(jobqueue_005fdetails_jsp.java:64)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:363)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
> at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
> 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:324)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
> at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)
> Is it because any of the configuration in capacity-scheduler.xml is incorrect?
> I tried forcing the namenode out of the safemode in bin/hadoop
> dfsadmin, but still it does not work.
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