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https://issues.apache.org/jira/browse/HADOOP-15697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16593620#comment-16593620
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Wei-Chiu Chuang commented on HADOOP-15697:
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Hi [~maheshk114] thanks for reporting the issue. Do you have a heap dump after
the OOM? Without a heapdump or a stacktrace it's hard to know what went wrong
exactly.
One source of OOM that we are aware of is the file lists (distcp has to get a
list of every files) and it can grow to several gigabytes for a large
directory. This known issue is addressed by HADOOP-12502. But there could be
other issues as well so we'll need more data to understand better.
> memory leak in distcp run method
> --------------------------------
>
> Key: HADOOP-15697
> URL: https://issues.apache.org/jira/browse/HADOOP-15697
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: mahesh kumar behera
> Priority: Major
>
> in distcp run method, execute is called but the job is not closed. This is
> causing OOM error in Hive replication. I think in run method , shouldBlock
> should be set to true and execute should be called within try-with-resources.
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