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Posted to issues@hawq.apache.org by "Lei Chang (JIRA)" <ji...@apache.org> on 2016/01/24 02:25:39 UTC

[jira] [Updated] (HAWQ-241) Cleanup MirroredLock related codes before checkpoint lock holding time optimization.

     [ https://issues.apache.org/jira/browse/HAWQ-241?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lei Chang updated HAWQ-241:
---------------------------
    Fix Version/s: 2.0.0

> Cleanup MirroredLock related codes before checkpoint lock holding time optimization.
> ------------------------------------------------------------------------------------
>
>                 Key: HAWQ-241
>                 URL: https://issues.apache.org/jira/browse/HAWQ-241
>             Project: Apache HAWQ
>          Issue Type: Bug
>            Reporter: Ming LI
>            Assignee: Ming LI
>             Fix For: 2.0.0
>
>
> MirroredLock is no use in hawq because there is no segment mirroring, and it is not used by master mirroring which uses xlog directly.
> The reason why we need to remove it is: in some scenarios the request order of this lock and CheckpointStartLock may cause deadlock. 



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