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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9119) ZooKeeperHiveLockManager does not use zookeeper in the proper way
Date Sun, 11 Jan 2015 04:16:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14272806#comment-14272806
] 

Xuefu Zhang commented on HIVE-9119:
-----------------------------------

+1 patch looks good to me. Thanks for fixing this long haunting issue, and now the zookeeper
related code is much cleaner also.

> ZooKeeperHiveLockManager does not use zookeeper in the proper way
> -----------------------------------------------------------------
>
>                 Key: HIVE-9119
>                 URL: https://issues.apache.org/jira/browse/HIVE-9119
>             Project: Hive
>          Issue Type: Improvement
>          Components: Locking
>    Affects Versions: 0.13.0, 0.14.0, 0.13.1
>            Reporter: Na Yang
>            Assignee: Na Yang
>         Attachments: HIVE-9119.1.patch, HIVE-9119.2.patch, HIVE-9119.3.patch, HIVE-9119.4.patch
>
>
> ZooKeeperHiveLockManager does not use zookeeper in the proper way. 
> Currently a new zookeeper client instance is created for each getlock/releaselock query
which sometimes causes the number of open connections between
> HiveServer2 and ZooKeeper exceed the max connection number that zookeeper server allows.

> To use zookeeper as a distributed lock, there is no need to create a new zookeeper instance
for every getlock try. A single zookeeper instance could be reused and shared by ZooKeeperHiveLockManagers.
  



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