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From "David Ezzio (asmtp)" <>
Subject Re: DataCache and OptimisticVerificationException
Date Tue, 10 Jul 2007 18:15:33 GMT
Hi Frank,

This is not the best place to discuss user issues with OpenJPA.  The 
list to use for that is

This is definitely not the place to discuss issues with Kodo.  I suggest 
that you contact BEA support in Germany.  Let me know if you need any 
further information.

Best wishes,


Frank Jagla wrote:
> Hello,
> using the Kodo 4 DataCache sometimes we see 
> OptimisticVerificationExceptions:
> <2|true|0.9.5-incubating>
> kodo.jdo.OptimisticVerificationException: Optimistic locking errors were
> detected when flushing to the data store.  The following objects may have
> been concurrently modified in another transaction:
> [de.logas.vera.SdgZollPositionImpl-62455866]
> We switch off the DataCache, and the exception vanishes.
> kodo.DataCache = false
> I think this happens in a single JVM without RemoteCommitProviders 
> involved and
> synchronisation issues between JVMs and their DataCaches.

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