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From "Ramya R (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5908) ArithmeticException in heartbeats with zero map jobs
Date Wed, 27 May 2009 13:10:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12713563#action_12713563
] 

Ramya R commented on HADOOP-5908:
---------------------------------

With the above patch, observed NPE in heartbeats with zero map jobs.
Below is the stacktrace
{noformat}
java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
        at org.apache.hadoop.mapred.JobInProgress.findNewMapTask(JobInProgress.java:1777)
        at org.apache.hadoop.mapred.JobInProgress.obtainNewMapTask(JobInProgress.java:982)
        at org.apache.hadoop.mapred.CapacityTaskScheduler$MapSchedulingMgr.obtainNewTask(CapacityTaskScheduler.java:572)
        at org.apache.hadoop.mapred.CapacityTaskScheduler$TaskSchedulingMgr.getTaskFromQueue(CapacityTaskScheduler.java:418)
        at org.apache.hadoop.mapred.CapacityTaskScheduler$TaskSchedulingMgr.assignTasks(CapacityTaskScheduler.java:498)
        at org.apache.hadoop.mapred.CapacityTaskScheduler$TaskSchedulingMgr.access$500(CapacityTaskScheduler.java:277)
        at org.apache.hadoop.mapred.CapacityTaskScheduler.assignTasks(CapacityTaskScheduler.java:977)
        at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:2605)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)
{noformat}


> ArithmeticException in heartbeats with zero map jobs
> ----------------------------------------------------
>
>                 Key: HADOOP-5908
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5908
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Vinod K V
>            Assignee: Amar Kamat
>         Attachments: HADOOP-5908-v3.0.patch
>
>


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