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https://issues.apache.org/jira/browse/HIVE-16425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15965690#comment-15965690
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Gopal V commented on HIVE-16425:
--------------------------------
[~mmccline]: quick review?
> Vectorization: unload old hashtables before reloadHashTable
> -----------------------------------------------------------
>
> Key: HIVE-16425
> URL: https://issues.apache.org/jira/browse/HIVE-16425
> Project: Hive
> Issue Type: Bug
> Components: Vectorization
> Reporter: Gopal V
> Assignee: Gopal V
> Attachments: HIVE-16425.1.patch
>
>
> {code}
> @Override
> protected void reloadHashTable(byte pos, int partitionId)
> throws IOException, HiveException, SerDeException,
> ClassNotFoundException {
> // The super method will reload a hash table partition of one of the
> small tables.
> // Currently, for native vector map join it will only be one small table.
> super.reloadHashTable(pos, partitionId);
> MapJoinTableContainer smallTable = spilledMapJoinTables[pos];
> vectorMapJoinHashTable =
> VectorMapJoinOptimizedCreateHashTable.createHashTable(conf,
> smallTable);
> needHashTableSetup = true;
> LOG.info("Created " + vectorMapJoinHashTable.getClass().getSimpleName() +
> " from " + this.getClass().getSimpleName());
> if (isLogDebugEnabled) {
> LOG.debug(CLASS_NAME + " reloadHashTable!");
> }
> }
> {code}
> The super call causes an OOM because of existing memory usage by
> vectorMapJoinHashTable.
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