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Posted to issues@impala.apache.org by "Marcel Kornacker (JIRA)" <ji...@apache.org> on 2017/05/28 08:55:04 UTC

[jira] [Created] (IMPALA-5384) Simplify coordinator locking protocol

Marcel Kornacker created IMPALA-5384:
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             Summary: Simplify coordinator locking protocol
                 Key: IMPALA-5384
                 URL: https://issues.apache.org/jira/browse/IMPALA-5384
             Project: IMPALA
          Issue Type: Improvement
    Affects Versions: Impala 2.9.0
            Reporter: Marcel Kornacker
            Assignee: Marcel Kornacker


The coordinator has a central lock (lock_) which is used very liberally to synchronize state changes that don't need to be synchronized, creating a concurrency bottle.

Also, the coordinator contains a number of data structures related to INSERT finalization that don't need to be part of and synchronized with the rest of the coordinator state.



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