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https://issues.apache.org/jira/browse/HADOOP-3267?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12645879#action_12645879
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Jean-Daniel Cryans commented on HADOOP-3267:
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We just had the same problem using 0.18.1 where some counters would return
double their value in a unit test. I tried the first part of the patch and it
fixed the problem. I was about to refresh it so that it applies to trunk and I
ran the test without the fix but it didn't fail as expected. I then tried
branch 0.19 with our test and we didn't see the problem so it seem to be fixed
for versions > 0.18.
I suggest closing this issue.
> Counters value of reduce input records do not match map output records
> -----------------------------------------------------------------------
>
> Key: HADOOP-3267
> URL: https://issues.apache.org/jira/browse/HADOOP-3267
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Environment: RHEL5, sun java version "1.6.0_04"
> Reporter: Daniel Udatny
> Assignee: Daniel Udatny
> Attachments: WrongCounterValues-TestandPatch-03.txt
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> Counters value of reduce input records do not match map output records under
> certain circumstances.
> somehow reproducable
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