Is the -userThreads switch required when using internal connection?

Hi,
Maybe someone can help me with this.
I have an ADF application module (JDeveloper 10.1.3.4) that uses something similar to dynamic credentials. It's configured so that it uses the jbo.server.internal_connection configuration parameter.
Everything works fine, but from time to time I'm receiving the following error:
oracle.jbo.DMLException: JBO-27200: JNDI failure. Unable to lookup Data Source at context java:comp/env/jdbc/internalDS
at oracle.jbo.server.DBTransactionImpl.lookupDataSource(DBTransactionImpl.java:1452)
     at oracle.jbo.server.DBTransactionImpl.getInternalConnection(DBTransactionImpl.java:1402)
     at oracle.jbo.server.DBTransactionImpl.getPersistManagerConnection(DBTransactionImpl.java:1304)
     at oracle.jbo.pcoll.PCollManager.ensureConnection(PCollManager.java:489)
     at oracle.jbo.pcoll.OraclePersistManager.getConnection(OraclePersistManager.java:148)
     at oracle.jbo.pcoll.OraclePersistManager.persistentObjectsExist(OraclePersistManager.java:683)
     at oracle.jbo.pcoll.OraclePersistManager.createTable(OraclePersistManager.java:765)
     at oracle.jbo.pcoll.OraclePersistManager.queryNextCollectionId(OraclePersistManager.java:1388)
     at oracle.jbo.pcoll.PCollManager.register(PCollManager.java:566)
     at oracle.jbo.pcoll.PCollection.<init>(PCollection.java:103)
     at oracle.jbo.pcoll.PCollManager.createCollection(PCollManager.java:464)
     at oracle.jbo.server.DBSerializer.setup(DBSerializer.java:153)
     at oracle.jbo.server.DBSerializer.passivateRootAM(DBSerializer.java:286)
     at oracle.jbo.server.DBSerializer.passivateRootAM(DBSerializer.java:267)
     at oracle.jbo.server.ApplicationModuleImpl.passivateStateInternal(ApplicationModuleImpl.java:5305)
     at oracle.jbo.server.ApplicationModuleImpl.passivateState(ApplicationModuleImpl.java:5192)
     at oracle.jbo.server.ApplicationPoolMessageHandler.doPoolMessage(ApplicationPoolMessageHandler.java:332)
     at oracle.jbo.server.ApplicationModuleImpl.doPoolMessage(ApplicationModuleImpl.java:7777)
     at oracle.jbo.common.ampool.ApplicationPoolImpl.sendPoolMessage(ApplicationPoolImpl.java:4074)
     at oracle.jbo.common.ampool.ApplicationPoolImpl.manageReferencingState(ApplicationPoolImpl.java:1239)
     at oracle.jbo.common.ampool.ApplicationPoolImpl.finalizeResource(ApplicationPoolImpl.java:1156)
     at oracle.jbo.pool.ResourcePool.removeResourceInternal(ResourcePool.java:749)
     at oracle.jbo.pool.ResourcePool.setState(ResourcePool.java:1004)
     at oracle.jbo.pool.ResourcePool.gc(ResourcePool.java:1423)
     at oracle.jbo.pool.ResourcePool.wakeup(ResourcePool.java:774)
     at oracle.jbo.pool.ResourcePool.wakeup(ResourcePool.java:779)
     at oracle.jbo.pool.ResourcePoolMonitor.run(ResourcePoolMonitor.java:98)
     at java.util.TimerThread.mainLoop(Timer.java:512)
     at java.util.TimerThread.run(Timer.java:462)
## Detail 0 ##
javax.naming.NamingException: Not in an application scope - start OC4J with the -userThreads switch if using user-created threads
     at com.evermind.server.PreemptiveApplicationContext.getContext(PreemptiveApplicationContext.java:30)
     at com.evermind.naming.FilterContext.lookup(FilterContext.java:126)
     at com.evermind.server.PreemptiveApplicationContext.lookup(PreemptiveApplicationContext.java:42)
     at javax.naming.InitialContext.lookup(InitialContext.java:351)
     at oracle.jbo.server.DBTransactionImpl.lookupDataSource(DBTransactionImpl.java:1438)
     at oracle.jbo.server.DBTransactionImpl.getInternalConnection(DBTransactionImpl.java:1402)
     at oracle.jbo.server.DBTransactionImpl.getPersistManagerConnection(DBTransactionImpl.java:1304)
     at oracle.jbo.pcoll.PCollManager.ensureConnection(PCollManager.java:489)
     at oracle.jbo.pcoll.OraclePersistManager.getConnection(OraclePersistManager.java:148)
     at oracle.jbo.pcoll.OraclePersistManager.persistentObjectsExist(OraclePersistManager.java:683)
     at oracle.jbo.pcoll.OraclePersistManager.createTable(OraclePersistManager.java:765)
     at oracle.jbo.pcoll.OraclePersistManager.queryNextCollectionId(OraclePersistManager.java:1388)
     at oracle.jbo.pcoll.PCollManager.register(PCollManager.java:566)
     at oracle.jbo.pcoll.PCollection.<init>(PCollection.java:103)
     at oracle.jbo.pcoll.PCollManager.createCollection(PCollManager.java:464)
     at oracle.jbo.server.DBSerializer.setup(DBSerializer.java:153)
     at oracle.jbo.server.DBSerializer.passivateRootAM(DBSerializer.java:286)
     at oracle.jbo.server.DBSerializer.passivateRootAM(DBSerializer.java:267)
     at oracle.jbo.server.ApplicationModuleImpl.passivateStateInternal(ApplicationModuleImpl.java:5305)
     at oracle.jbo.server.ApplicationModuleImpl.passivateState(ApplicationModuleImpl.java:5192)
     at oracle.jbo.server.ApplicationPoolMessageHandler.doPoolMessage(ApplicationPoolMessageHandler.java:332)
     at oracle.jbo.server.ApplicationModuleImpl.doPoolMessage(ApplicationModuleImpl.java:7777)
     at oracle.jbo.common.ampool.ApplicationPoolImpl.sendPoolMessage(ApplicationPoolImpl.java:4074)
     at oracle.jbo.common.ampool.ApplicationPoolImpl.manageReferencingState(ApplicationPoolImpl.java:1239)
     at oracle.jbo.common.ampool.ApplicationPoolImpl.finalizeResource(ApplicationPoolImpl.java:1156)
     at oracle.jbo.pool.ResourcePool.removeResourceInternal(ResourcePool.java:749)
     at oracle.jbo.pool.ResourcePool.setState(ResourcePool.java:1004)
     at oracle.jbo.pool.ResourcePool.gc(ResourcePool.java:1423)
     at oracle.jbo.pool.ResourcePool.wakeup(ResourcePool.java:774)
     at oracle.jbo.pool.ResourcePool.wakeup(ResourcePool.java:779)
     at oracle.jbo.pool.ResourcePoolMonitor.run(ResourcePoolMonitor.java:98)
     at java.util.TimerThread.mainLoop(Timer.java:512)
     at java.util.TimerThread.run(Timer.java:462)
This datasource exists and works properly with the persistence table (PS_TXN has records). The detail indicates that I have to start OC4J with the -userThreads switch, but I didn't find in the documentation if this is really necessary and why.
I hope someone can help me with this question.
Thanks in advance,
Tatiana.

Do you get this error while running the AM ?
Can you check in the AM ->Concfigurations (for the AM you are running) as to whats the connection type you are using.
AFAIK , for OC4J it should be JDBC URL and not JDBC datasource which you seem to be using.

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