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https://issues.apache.org/jira/browse/HIVE-2907?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13238662#comment-13238662
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Mousom Dhar Gupta commented on HIVE-2907:
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For ObjectStore::dropTable am dropping pratitions in batches. And for
DDLTask::dropTable am
getting all partition names and then getting partition metadata from those
names in batches.
The batch size is determined by a config parameter (set to 1000 to start with).
Thanks
> Hive error when dropping a table with large number of partitions
> ----------------------------------------------------------------
>
> Key: HIVE-2907
> URL: https://issues.apache.org/jira/browse/HIVE-2907
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Affects Versions: 0.9.0
> Environment: General. Hive Metastore bug.
> Reporter: Mousom Dhar Gupta
> Priority: Minor
> Fix For: 0.9.0
>
> Attachments: HIVE-2907.1.patch.txt
>
> Original Estimate: 10h
> Remaining Estimate: 10h
>
> Running into an "Out Of Memory" error when trying to drop a table with 128K
> partitions.
> The methods dropTable in
> metastore/src/java/org/apache/hadoop/hive/metastore/ObjectStore.java
> and dropTable in ql/src/java/org/apache/hadoop/hive/ql/exec/DDLTask.java
> encounter out of memory errors
> when dropping tables with lots of partitions because they try to load the
> metadata for every partition into memory.
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