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Posted to commits@cayenne.apache.org by "John Huss (JIRA)" <ji...@apache.org> on 2012/12/18 18:04:15 UTC

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

John Huss created CAY-1782:
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             Summary: 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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