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From "Eugene Koifman (JIRA)" <>
Subject [jira] [Commented] (HIVE-11388) Allow ACID Compactor components to run in multiple metastores
Date Tue, 22 Mar 2016 17:33:25 GMT


Eugene Koifman commented on HIVE-11388:

This change makes use of JDBC Connections, and thus the connection pool may need to be larger.
 Pool size is currently hardcoded.  Should fix HIVE-12592.

> Allow ACID Compactor components to run in multiple metastores
> -------------------------------------------------------------
>                 Key: HIVE-11388
>                 URL:
>             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
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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