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https://issues.apache.org/jira/browse/HIVE-2988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13264575#comment-13264575
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Ashutosh Chauhan commented on HIVE-2988:
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HIVE-2738 also reports problem with XMLEncoder, though looks unrelated.
> Use of XMLEncoder to serialize MapredWork causes OOM in hive cli
> ----------------------------------------------------------------
>
> Key: HIVE-2988
> URL: https://issues.apache.org/jira/browse/HIVE-2988
> Project: Hive
> Issue Type: Improvement
> Components: CLI
> Reporter: Rohini Palaniswamy
> Labels: Performance
>
> When running queries on tables with 6000 partitions, hive cli if configured
> with 128M runs into OOM. Heapdump showed 37MB occupied by one XMLEncoder
> object while the MapredWork was 500K which is highly inefficient. We should
> switch to using something more efficient like XStream.
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