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https://issues.apache.org/jira/browse/MAPREDUCE-2224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12975418#action_12975418
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Todd Lipcon commented on MAPREDUCE-2224:
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[exec] +1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] +1 tests included. The patch appears to include 3 new or
modified tests.
[exec]
[exec] +1 javadoc. The javadoc tool did not generate any 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
(version 1.3.9) warnings.
[exec]
[exec] +1 release audit. The applied patch does not increase the
total number of release audit warnings.
[exec]
[exec] +1 system test framework. The patch passed system test
framework compile.
Failed tests:
[junit] Test org.apache.hadoop.mapred.TestControlledMapReduceJob FAILED
(timeout)
[junit] Test org.apache.hadoop.mapreduce.lib.db.TestDBJob FAILED (timeout)
[junit] Test org.apache.hadoop.mapreduce.lib.db.TestDataDrivenDBInputFormat
FAILED (timeout)
which I believe are all failing on trunk
> Synchronization bugs in JvmManager
> ----------------------------------
>
> Key: MAPREDUCE-2224
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2224
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.22.0
>
> Attachments: mapreduce-2224-cdh3.txt, mapreduce-2224.txt,
> mapreduce-2224.txt, mapreduce-2224.txt, mapreduce-2224.txt
>
>
> JvmManager.JvmManagerForType has several HashMap members that are
> inconsistently synchronized. I've seen sporadic NPEs in the 0.20 version of
> this code which has similar bugs.
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