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Posted to dev@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2014/05/14 23:55:18 UTC

[jira] [Commented] (HIVE-6965) Transaction manager should use RDBMS time instead of machine time

    [ https://issues.apache.org/jira/browse/HIVE-6965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13998111#comment-13998111 ] 

Ashutosh Chauhan commented on HIVE-6965:
----------------------------------------

+1

> Transaction manager should use RDBMS time instead of machine time
> -----------------------------------------------------------------
>
>                 Key: HIVE-6965
>                 URL: https://issues.apache.org/jira/browse/HIVE-6965
>             Project: Hive
>          Issue Type: Bug
>          Components: Locking
>    Affects Versions: 0.13.0
>            Reporter: Alan Gates
>            Assignee: Alan Gates
>         Attachments: HIVE-6965.patch
>
>
> Current TxnHandler and CompactionTxnHandler use System.currentTimeMillis() when they need to determine the time (such as heartbeating transactions).  In situations where there are multiple Thrift metastore services or users are using an embedded metastore this will lead to issues.  We should instead be using time from the RDBMS, which is guaranteed to be the same for all users.



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