While running org.jbpm.job.executor.JobExecutorDbTest, the following error prevents job execution threads from completing jobs within the predefined threshold of 1 minute.

2008-09-29 19:03:41,078 WARN [org.hibernate.util.JDBCExceptionReporter] SQL Error: 1205, SQLState: S1000
2008-09-29 19:03:41,078 ERROR [org.hibernate.util.JDBCExceptionReporter] Your server command (family id #0, process id #77) encountered a deadlock situation. Please re-run your command.

Other tests that fail due to the same cause are:

SubProcessPlusConcurrencyDbTest
JBPM1072Test
JBPM1755Test
JBPM983Test
LockingTest
JobExecutorCustomizationTest

The tests will be excluded until this issue is resolved. The hibernate.order_updates property might help solve the problem.