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https://issues.apache.org/jira/browse/IMPALA-1803?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong resolved IMPALA-1803.
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Resolution: Fixed
Fix Version/s: Impala 3.0
IMPALA-4899 and IMPALA-5293 should address this.
> Avoid hitting OOM in HdfsTableSink when inserting to Parquet
> ------------------------------------------------------------
>
> Key: IMPALA-1803
> URL: https://issues.apache.org/jira/browse/IMPALA-1803
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Affects Versions: Impala 2.0
> Reporter: Ippokratis Pandis
> Priority: Major
> Labels: resource-management, usability
> Fix For: Impala 3.0
>
> Attachments: hdfstablesink-oom.txt
>
>
> Impala's memory consumption is very high when it writes to Parquet and there
> is a large number of partitions, primarily because we try to buffer data per
> partition. That however can lead to OOM, see attached profile. Instead we can
> either spill the buffered data to disk or write to Parquet files.
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