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https://issues.apache.org/jira/browse/HIVE-11388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15206934#comment-15206934
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Eugene Koifman commented on HIVE-11388:
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This patch also includes a 1 character fix to an issue introduced in HIVE-13013
(SQL stmt in TxnHandler.lockTransactionRecord())
> Allow ACID Compactor components to run in multiple metastores
> -------------------------------------------------------------
>
> Key: HIVE-11388
> URL: https://issues.apache.org/jira/browse/HIVE-11388
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Affects Versions: 1.0.0
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Priority: Critical
> Attachments: HIVE-11388.2.patch, HIVE-11388.4.patch,
> HIVE-11388.5.patch, HIVE-11388.6.patch, HIVE-11388.7.patch, HIVE-11388.patch
>
>
> (this description is no loner accurate; see further comments)
> org.apache.hadoop.hive.ql.txn.compactor.Initiator is a thread that runs
> inside the metastore service to manage compactions of ACID tables. There
> should be exactly 1 instance of this thread (even with multiple Thrift
> services).
> This is documented in
> https://cwiki.apache.org/confluence/display/Hive/Hive+Transactions#HiveTransactions-Configuration
> but not enforced.
> Should add enforcement, since more than 1 Initiator could cause concurrent
> attempts to compact the same table/partition - which will not work.
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