hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1089) Fair Scheduler preemption triggers NPE when tasks are scheduled but not running
Date Sat, 10 Oct 2009 00:56:31 GMT
Fair Scheduler preemption triggers NPE when tasks are scheduled but not running
-------------------------------------------------------------------------------

                 Key: MAPREDUCE-1089
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1089
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: contrib/fair-share
    Affects Versions: 0.21.0
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon


We see exceptions like this when preemption runs when a task has been scheduled on a TT but
has not yet started running.

2009-10-09 14:30:53,989 INFO org.apache.hadoop.mapred.FairScheduler: Should preempt 2 MAP
tasks for job_200910091420_0006: tasksDueToMinShare = 2, tasksDueToFairShare = 0
2009-10-09 14:30:54,036 ERROR org.apache.hadoop.mapred.FairScheduler: Exception in fair scheduler
UpdateThread
java.lang.NullPointerException
        at org.apache.hadoop.mapred.FairScheduler$2.compare(FairScheduler.java:1015)
        at org.apache.hadoop.mapred.FairScheduler$2.compare(FairScheduler.java:1013)
        at java.util.Arrays.mergeSort(Arrays.java:1270)
        at java.util.Arrays.sort(Arrays.java:1210)
        at java.util.Collections.sort(Collections.java:159)
        at org.apache.hadoop.mapred.FairScheduler.preemptTasks(FairScheduler.java:1013)
        at org.apache.hadoop.mapred.FairScheduler.preemptTasksIfNecessary(FairScheduler.java:911)
        at org.apache.hadoop.mapred.FairScheduler$UpdateThread.run(FairScheduler.java:286)


-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message