OptimisticLockException
-----------------------
Key: ODE-303
URL: https://issues.apache.org/jira/browse/ODE-303
Project: ODE
Issue Type: Bug
Affects Versions: 1.2
Environment: JBI, Apache Servicemix, MySQL Internal
Reporter: Rafal Rusin
I was trying to run a process which receives a message with correlation ID, and
discards incoming requests if it's already processing a given ID.
I did the following (simplified notation):
<receive correlation=cid/>
<flow>
<scope>some processing</scope>
<scope>
<pick correlation=cid/>
<throw>discarded</throw>
</scope>
</flow>
Then I run 10 requests and I had a following error:
06:07:58,628 | WARN | pool-4-thread-3 | Transaction |
action.manager.TransactionImpl 516 | Unexpected exception from
beforeCompletion; transaction will roll back
<openjpa-1.0.1-r420667:592145 nonfatal store error>
org.apache.openjpa.persistence.OptimisticLockException: Optimistic locking
errors were detected when flushing to the data store.
The following objects may have been concurrently modified in another
transaction:
[org.apache.ode.dao.jpa.MessageRouteDAOImpl-org.apache.ode.dao.jpa.MessageRouteDAOImpl-905]
at
org.apache.openjpa.kernel.BrokerImpl.newFlushException(BrokerImpl.java:2104)
at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:1954)
at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:1852)
at
org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:1770)
at
org.apache.geronimo.transaction.manager.TransactionImpl.beforeCompletion(TransactionImpl.java:514)
at
org.apache.geronimo.transaction.manager.TransactionImpl.beforeCompletion(TransactionImpl.java:498)
at
org.apache.geronimo.transaction.manager.TransactionImpl.beforePrepare(TransactionImpl.java:400)
at
org.apache.geronimo.transaction.manager.TransactionImpl.commit(TransactionImpl.java:257)
at
org.apache.geronimo.transaction.manager.TransactionManagerImpl.commit(TransactionManagerImpl.java:238)
at
org.apache.ode.scheduler.simple.SimpleScheduler.execTransaction(SimpleScheduler.java:181)
at
org.apache.ode.scheduler.simple.SimpleScheduler$4.call(SimpleScheduler.java:335)
at
org.apache.ode.scheduler.simple.SimpleScheduler$4.call(SimpleScheduler.java:332)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
at java.util.concurrent.FutureTask.run(FutureTask.java:123)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)
Caused by: <openjpa-1.0.1-r420667:592145 nonfatal store error>
org.apache.openjpa.persistence.OptimisticLockException: An optimistic lock
violation was detected when flushing object
instance
"org.apache.ode.dao.jpa.MessageRouteDAOImpl-org.apache.ode.dao.jpa.MessageRouteDAOImpl-905"
to the data store. This indicates that the object was concurrently modified
in a
nother transaction.
FailedObject:
org.apache.ode.dao.jpa.MessageRouteDAOImpl-org.apache.ode.dao.jpa.MessageRouteDAOImpl-905
at
org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flushInternal(PreparedStatementManagerImpl.java:101)
at
org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flush(PreparedStatementManagerImpl.java:73)
at
org.apache.openjpa.jdbc.kernel.ConstraintUpdateManager.flush(ConstraintUpdateManager.java:543)
at
org.apache.openjpa.jdbc.kernel.ConstraintUpdateManager.flush(ConstraintUpdateManager.java:119)
at
org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.flush(AbstractUpdateManager.java:89)
at
org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.flush(AbstractUpdateManager.java:72)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.flush(JDBCStoreManager.java:514)
at
org.apache.openjpa.kernel.DelegatingStoreManager.flush(DelegatingStoreManager.java:130)
... 16 more
06:07:58,635 | DEBUG | pool-4-thread-3 | sql |
utils.LoggingConnectionWrapper 215 | close
06:07:58,637 | DEBUG | pool-4-thread-3 | yRoleMessageExchangeImpl |
ne.MyRoleMessageExchangeImpl$1 217 | Received myrole mex response callback
06:07:58,638 | ERROR | pool-4-thread-3 | SimpleScheduler |
duler.simple.SimpleScheduler$4 356 | Error while executing transaction
javax.transaction.RollbackException: Unable to commit: transaction marked for
rollback
at
org.apache.geronimo.transaction.manager.TransactionImpl.commit(TransactionImpl.java:271)
at
org.apache.geronimo.transaction.manager.TransactionManagerImpl.commit(TransactionManagerImpl.java:238)
at
org.apache.ode.scheduler.simple.SimpleScheduler.execTransaction(SimpleScheduler.java:181)
at
org.apache.ode.scheduler.simple.SimpleScheduler$4.call(SimpleScheduler.java:335)
at
org.apache.ode.scheduler.simple.SimpleScheduler$4.call(SimpleScheduler.java:332)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
at java.util.concurrent.FutureTask.run(FutureTask.java:123)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)
Currently, I resolved this by setting
ode-jbi.threads.pool.size=1
But is this workaround OK? I worry that this single thread may block on some
communication and the whole bpel engine will hang.
Regards
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