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https://issues.apache.org/jira/browse/MAPREDUCE-5512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13792356#comment-13792356
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Ivan Mitic commented on MAPREDUCE-5512:
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Thanks Chris for the review, will commit the patch shortly.
> TaskTracker hung after failed reconnect to the JobTracker
> ---------------------------------------------------------
>
> Key: MAPREDUCE-5512
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5512
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 1.3.0
> Reporter: Ivan Mitic
> Assignee: Ivan Mitic
> Attachments: hadoop-tasktracker-RD00155DD09100.log,
> MAPREDUCE-5512.branch-1.patch, tt_Hung.txt
>
>
> TaskTracker hung after failed reconnect to the JobTracker.
> This is the problematic piece of code:
> {code}
> this.distributedCacheManager = new TrackerDistributedCacheManager(
> this.fConf, taskController);
> this.distributedCacheManager.startCleanupThread();
>
> this.jobClient = (InterTrackerProtocol)
> UserGroupInformation.getLoginUser().doAs(
> new PrivilegedExceptionAction<Object>() {
> public Object run() throws IOException {
> return RPC.waitForProxy(InterTrackerProtocol.class,
> InterTrackerProtocol.versionID,
> jobTrackAddr, fConf);
> }
> });
> {code}
> In case RPC.waitForProxy() throws, TrackerDistributedCacheManager cleanup
> thread will never be stopped, and given that it is a non daemon thread it
> will keep TT up forever.
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