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Posted to issues@ignite.apache.org by "Ivan Pavlukhin (JIRA)" <ji...@apache.org> on 2019/01/18 10:04:00 UTC

[jira] [Commented] (IGNITE-9322) MVCC: implement deadlock detector

    [ https://issues.apache.org/jira/browse/IGNITE-9322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16746115#comment-16746115 ] 

Ivan Pavlukhin commented on IGNITE-9322:
----------------------------------------

[~gvvinblade] Please review the patch. Most significant latest change is tx abort by cascade.

> MVCC: implement deadlock detector
> ---------------------------------
>
>                 Key: IGNITE-9322
>                 URL: https://issues.apache.org/jira/browse/IGNITE-9322
>             Project: Ignite
>          Issue Type: Task
>          Components: mvcc
>            Reporter: Vladimir Ozerov
>            Assignee: Ivan Pavlukhin
>            Priority: Major
>             Fix For: 2.8
>
>
> Deadlocks are not uncommon during SQL execution.
> We need to implement distributed deadlock detection protocol for MVCC. Essentially, nodes should exchange some map of tx wait lists, and try to find a loop. If loop is found, then one of problematic transactions should be rolled back.



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