FAQ
NPE in tracker expiry thread.
-----------------------------

Key: HADOOP-5375
URL: https://issues.apache.org/jira/browse/HADOOP-5375
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Affects Versions: 0.20.0
Reporter: Vinod K V



I see NullPointerExceptions in Task Expiry thread of the JobTracker. Exception log in JT:
{code}
2009-02-28 07:22:51,392 ERROR org.apache.hadoop.mapred.JobTracker: Tracker Expiry Thread got exception: java.lang.NullPointerException
{code}

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  • Vinod K V (JIRA) at Mar 2, 2009 at 11:28 am
    [ https://issues.apache.org/jira/browse/HADOOP-5375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12677961#action_12677961 ]

    Vinod K V commented on HADOOP-5375:
    -----------------------------------

    A quick look at the code suggests that the problem is with the following in JobTracker.java +3210 in lostTracker() method:
    {code}
    TaskInProgress tip = taskidToTIPMap.get(taskId);
    JobInProgress job = tip.getJob();
    {code}

    If the job is completed/removed from the memory, this would result in an NPE. Not sure if there are any more such places.
    NPE in tracker expiry thread.
    -----------------------------

    Key: HADOOP-5375
    URL: https://issues.apache.org/jira/browse/HADOOP-5375
    Project: Hadoop Core
    Issue Type: Bug
    Components: mapred
    Affects Versions: 0.20.0
    Reporter: Vinod K V

    I see NullPointerExceptions in Task Expiry thread of the JobTracker. Exception log in JT:
    {code}
    2009-02-28 07:22:51,392 ERROR org.apache.hadoop.mapred.JobTracker: Tracker Expiry Thread got exception: java.lang.NullPointerException
    {code}
    --
    This message is automatically generated by JIRA.
    -
    You can reply to this email to add a comment to the issue online.

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groupcommon-dev @
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postedMar 2, '09 at 11:20a
activeMar 2, '09 at 11:28a
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Vinod K V (JIRA): 2 posts

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