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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-19340) Disable timeout of transactions opened by replication task at target cluster
Date Fri, 27 Apr 2018 18:25:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-19340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16456868#comment-16456868
] 

Sergey Shelukhin commented on HIVE-19340:
-----------------------------------------

Never aborting a transaction seems dangerous. 
If it does get stuck forever, what is the user supposed to do with it? 
And if the user aborts it manually, it's the same as timeout, just aggravating to the user.
You still have to handle when user aborts it.

If it's ok to get stuck for a long time, why not just increase the heartbeat timeout for it?

> Disable timeout of transactions opened by replication task at target cluster
> ----------------------------------------------------------------------------
>
>                 Key: HIVE-19340
>                 URL: https://issues.apache.org/jira/browse/HIVE-19340
>             Project: Hive
>          Issue Type: Sub-task
>          Components: repl, Transactions
>    Affects Versions: 3.0.0
>            Reporter: mahesh kumar behera
>            Assignee: mahesh kumar behera
>            Priority: Major
>              Labels: ACID, DR, pull-request-available, replication
>             Fix For: 3.0.0
>
>         Attachments: HIVE-19340.01.patch
>
>
> The transactions opened by applying EVENT_OPEN_TXN should never be aborted automatically
due to time-out. Aborting of transaction started by replication task may leads to inconsistent
state at target which needs additional overhead to clean-up. So, it is proposed to mark the
transactions opened by replication task as special ones and shouldn't be aborted if heart
beat is lost. This helps to ensure all ABORT and COMMIT events will always find the corresponding
txn at target to operate.



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