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Posted to commits@cassandra.apache.org by "Ekaterina Dimitrova (Jira)" <ji...@apache.org> on 2020/04/09 14:07:00 UTC

[jira] [Comment Edited] (CASSANDRA-15667) StreamResultFuture check for completeness is inconsistent, leading to races

    [ https://issues.apache.org/jira/browse/CASSANDRA-15667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17079380#comment-17079380 ] 

Ekaterina Dimitrova edited comment on CASSANDRA-15667 at 4/9/20, 2:06 PM:
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Hi Sergio,
Thanks for the patch and the broad explanation. 

I just returned the test [here|https://github.com/ekaterinadimitrova2/cassandra-dtest/tree/CASSANDRA-15667]

Unfortunately, I am not a committer so someone else should do it. Thanks again!


was (Author: e.dimitrova):
Hi Sergio,
Thanks for the patch and the broad explanation. 

I just returned the test [here|https://github.com/ekaterinadimitrova2/cassandra-dtest/tree/CASSANDRA-15667]

Unfortunately, I am not a committer so anyone else should do it. Thanks again!

> StreamResultFuture check for completeness is inconsistent, leading to races
> ---------------------------------------------------------------------------
>
>                 Key: CASSANDRA-15667
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15667
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Legacy/Streaming and Messaging
>            Reporter: Sergio Bossa
>            Assignee: Massimiliano Tomassi
>            Priority: Normal
>             Fix For: 4.0
>
>
> {{StreamResultFuture#maybeComplete()}} uses {{StreamCoordinator#hasActiveSessions()}} to determine if all sessions are completed, but then accesses each session state via {{StreamCoordinator#getAllSessionInfo()}}: this is inconsistent, as the former relies on the actual {{StreamSession}} state, while the latter on the {{SessionInfo}} state, and the two are concurrently updated with no coordination whatsoever.
> This leads to races, i.e. apparent in some dtest spurious failures, such as {{TestBootstrap.resumable_bootstrap_test}} in CASSANDRA-15614 cc [~e.dimitrova].



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