[Spacewalk-list] taskomatic exceptions

[Bruce Pennypacker]

I'm trying to track down why tasks are no longer executing on my 
Spacewalk server (1.0, running on RHEL5).  I discovered that there was a 
bogus entry in the RhnTaskQueue table - it had a null value in the 
task_data field.  Each time taskomatic started up it immediately threw 
an exception and stopped processing, so other tasks were getting queued 
up but never processing.  So I went into the database and just deleted 
that row from the table.  The next time taskomatic ran it emptied the 
table but threw a number of other exceptions.

 2010-05-10 14:57:00,032 [DefaultQuartzScheduler_Worker-0] ERROR 
org.hibernate.event.def.AbstractFlushingEventListener - Could not 
synchronize database state with session
 org.hibernate.StaleStateException: Batch update returned unexpected row 
count from update [0]; actual row count: 0; expected: 1
        at 
org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61)
        at 
org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46)
        at 
org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:24)
        at 
org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2520)
        at 
org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2697)
        at 
org.hibernate.action.EntityDeleteAction.execute(EntityDeleteAction.java:74)
        at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
        at 
org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:234)
        at 
org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:146)
        at 
org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
        at 
org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
        at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
        at 
com.redhat.rhn.common.db.datasource.CachedStatement.stealConnection(CachedStatement.java:853)
        at 
com.redhat.rhn.common.db.datasource.CachedStatement.execute(CachedStatement.java:441)
        at 
com.redhat.rhn.common.db.datasource.CachedStatement.execute(CachedStatement.java:431)
        at 
com.redhat.rhn.common.db.datasource.CachedStatement.execute(CachedStatement.java:335)
        at 
com.redhat.rhn.common.db.datasource.CachedStatement.execute(CachedStatement.java:340)
        at 
com.redhat.rhn.common.db.datasource.CachedStatement.execute(CachedStatement.java:280)
        at 
com.redhat.rhn.common.db.datasource.SelectMode.execute(SelectMode.java:105)
        at 
com.redhat.rhn.taskomatic.task.repomd.ChannelRepodataDriver.getCandidates(ChannelRepodataDriver.java:86)
        at 
com.redhat.rhn.taskomatic.task.threaded.TaskQueue.run(TaskQueue.java:106)
        at 
com.redhat.rhn.taskomatic.task.ChannelRepodata.execute(ChannelRepodata.java:59)
        at 
com.redhat.rhn.taskomatic.task.SingleThreadedTestableTask.execute(SingleThreadedTestableTask.java:54)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:203)
        at 
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)

 Any ideas what might be causing this?

Thanks,

-Bruce