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From Michael Pflueger <>
Subject concurrent thread exception plus deadlock on delete statement using slice
Date Tue, 07 Jun 2011 11:38:08 GMT
I've got some trouble executing delete statements using OpenJPA 2.1.0 with slice and 2 MySQL
5 backends.
Here's my code:

em.createQuery("delete from A").executeUpdate();
em.createQuery("delete from B").executeUpdate();
em.createQuery("delete from C").executeUpdate();

With this, I get the "Multiple concurrent threads attempted to access a single broker" Exception,
Even though my application only has one thread at this point.

Out of curiosity I enabled "Openjpa.Multithreaded", yet with this, even a single delete statement
leads to a deadlock.

Has anybody got this working or can provide some help?


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