[jira] [Closed] (CAY-1782) Deadlock when performing many concurrent inserts

["John Huss (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CAY-1782?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

John Huss closed CAY-1782.
--------------------------

       Resolution: Fixed
    Fix Version/s:     (was: 3.2.M2)
                   3.2M1

> Deadlock when performing many concurrent inserts
> ------------------------------------------------
>
>                 Key: CAY-1782
>                 URL: https://issues.apache.org/jira/browse/CAY-1782
>             Project: Cayenne
>          Issue Type: Bug
>          Components: Core Library
>    Affects Versions: 3.0, 3.1 (final), 3.2M1
>            Reporter: John Huss
>            Assignee: John Huss
>             Fix For: 3.2M1
>
>
> I've encountered a deadlock issue in production in an app performing many INSERTs.  The deadlock was between the PK generator and the PoolManager (getting a DB connection).  It is very bad.  I added a unit test demonstrating the problem and a fix for it.
> The fix is possibly not ideal because it requires a larger data structure for holding the cached primary keys, but it is far better than the previous behavior.
> If this fix is acceptable this should be back-ported to 3.1 as well.



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