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https://issues.apache.org/jira/browse/HADOOP-2708?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Doug Cutting updated HADOOP-2708:
---------------------------------
Fix Version/s: (was: 0.15.3)
Affects Version/s: (was: 0.15.2)
0.15.3
Can't fix something in an already-released version.
> Force the task tracker to exit when the task is complete, prevents nodes from
> dying due to resource starvation from impropertly written map/reduce tasks
> --------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-2708
> URL: https://issues.apache.org/jira/browse/HADOOP-2708
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Affects Versions: 0.15.3
> Reporter: Jason
> Priority: Minor
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> We have map/reduce jobs that sometimes run additional threads that are not at
> daemon priority, and these threads prevent the Task from properly exiting.
> When enough of these accumulate, the node falls over.
> The included patch forces the Tasks to exit when completed.
> Index: src/java/org/apache/hadoop/mapred/TaskTracker.java
> ===================================================================
> --- src/java/org/apache/hadoop/mapred/TaskTracker.java (revision 608611)
> +++ src/java/org/apache/hadoop/mapred/TaskTracker.java (working copy)
> @@ -1801,6 +1801,8 @@
> // This assumes that on return from Task.run()
> // there is no more logging done.
> LogManager.shutdown();
> +
> + System.exit(0);
> }
> }
> }
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