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From "Nikolay Izhikov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-9428) MVCC TX: MvccQueryTrackerImpl.onDone() semantic is broken.
Date Fri, 21 Sep 2018 13:13:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-9428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16623598#comment-16623598
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Nikolay Izhikov commented on IGNITE-9428:
-----------------------------------------

[~amashenkov] Do we have a chance to resolve this ticket until the code freeze of 2.7?

> MVCC TX: MvccQueryTrackerImpl.onDone() semantic is broken.
> ----------------------------------------------------------
>
>                 Key: IGNITE-9428
>                 URL: https://issues.apache.org/jira/browse/IGNITE-9428
>             Project: Ignite
>          Issue Type: Bug
>          Components: mvcc, sql
>            Reporter: Roman Kondakov
>            Assignee: Andrew Mashenkov
>            Priority: Major
>             Fix For: 2.7
>
>
> Due to IGNITE-9256 patch, multiple {{H2ResultSetIterator#onClose}} invocation becomes
possible. This can be considered as a {{Closable}} contract violation and should be fixed.
> Also this case revealed a bug in {{MvccQueryTrackerImpl}} when multiple {{onDone()}}
call leads to multiple query finished acks sent back to the {{MvccCoordinator}} which leads
to the problems with the query tracking and assertion errors.
> Reproducer: {{CacheMvccSqlTxQueriesAbstractTest#testAccountsTxDmlSumSql_WithRemoves_SingleNode}} 
>  
> Upd: test was fixed in IGNITE-9373. But MvccQueryTrackerImpl.onDone() issue is still
actual.



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