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https://issues.apache.org/jira/browse/MAPREDUCE-7277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17093883#comment-17093883
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Hudson commented on MAPREDUCE-7277:
-----------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #18190 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/18190/])
MAPREDUCE-7277. IndexCache totalMemoryUsed differs from cache contents. (ericp:
rev e2322e1117a2a3435aabecd49de0ad3c8d2f64b9)
* (edit)
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapred/TestIndexCache.java
* (edit)
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/IndexCache.java
> IndexCache totalMemoryUsed differs from cache contents.
> -------------------------------------------------------
>
> Key: MAPREDUCE-7277
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7277
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Jonathan Turner Eagles
> Assignee: Jonathan Turner Eagles
> Priority: Major
> Attachments: IndexCacheActualSize.png, MAPREDUCE-7277.001.patch,
> MAPREDUCE-7277.002.patch, MAPREDUCE-7277.003.patch, MAPREDUCE-7277.004.patch
>
>
> It was observed recently in a nodemanager OOM that the memory was filled with
> SpillRecords. However, the IndexCache was only 15% full (1.5MB used on a 10MB
> configured cache size). In particular was noted that the booking variable
> totalMemoryUsed, was out of sync with the contents of the cache showing 96%
> full, thereby drastically reducing the effectiveness of the cache.
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