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https://issues.apache.org/jira/browse/MAPREDUCE-1316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12801852#action_12801852
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Amar Kamat commented on MAPREDUCE-1316:
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I ran test-patch on trunk (i.e added a log line to JobTracker) and here is the
output
{noformat}
[exec] -1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] -1 tests included. The patch doesn't appear to include any new
or modified tests.
[exec] Please justify why no new tests are needed
for this patch.
[exec] Also please list what manual steps were
performed to verify this patch.
[exec]
[exec] -1 javadoc. The javadoc tool appears to have generated 1
warning messages.
[exec]
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
[exec]
[exec] +1 release audit. The applied patch does not increase the
total number of release audit warnings.
{noformat}
Looking at the test-patch output, I see a line
{noformat}
[javadoc]
src/contrib/mumak/src/java/org/apache/hadoop/mapred/SimulatorJobTracker.java:44:
warning
- Tag @link: reference not found: JobSubmissionProtocol
{noformat}
I dont see any JobSubmissionProtocol.java file in mapreduce trunk. I think
JobSubmissionProtocol.java is renamed to ClientProtocol.java.
> JobTracker holds stale references to retired jobs via unreported tasks
> -----------------------------------------------------------------------
>
> Key: MAPREDUCE-1316
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1316
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: jobtracker
> Reporter: Amar Kamat
> Assignee: Amar Kamat
> Priority: Blocker
> Attachments: mapreduce-1316-v1.11.patch,
> mapreduce-1316-v1.13-branch20-yahoo.patch,
> mapreduce-1316-v1.14-branch20-yahoo.patch,
> mapreduce-1316-v1.14.1-branch20-yahoo.patch,
> mapreduce-1316-v1.15-branch20-yahoo.patch, mapreduce-1316-v1.15.patch,
> mapreduce-1316-v1.7.patch
>
>
> JobTracker fails to remove _unreported_ tasks' mapping from _taskToTIPMap_ if
> the job finishes and retires. _Unreported tasks_ refers to tasks that were
> scheduled but the tasktracker did not report back with the task status. In
> such cases a stale reference is held to TaskInProgress (and thus
> JobInProgress) long after the job is gone leading to memory leak.
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