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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6035) jobtracker stops when namenode goes out of safemode runing capacit scheduler
Date Thu, 18 Jun 2009 04:13:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721049#action_12721049
] 

Hemanth Yamijala commented on HADOOP-6035:
------------------------------------------

Yikes. I noticed another error, probably the more important one. You have this in the mapred-site.xml:

{noformat}
  <property>
    <name>mapred.job.tracker</name>
    <value>hdfs://localhost:9001</value>
  </property>
{noformat}

The value of this configuration variable should just be localhost:9001. It is not a URI, and
definitely should not be prepended with 'hdfs://' which is the name of a filesystem URI. Can
you please retry with this ?

> 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
>         Attachments: capacity-scheduler.xml, hadoop-site.xml
>
>
> 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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