[jboss-user] [JBoss Seam] - questions about jboss embedded warns

[Stateless Bean]

Hi,
Finally i run my jboss embedded on tomcat 6.0, but im warring about few warns. Can anybody explain me this

anonymous wrote : 
  | JBoss Messaging Warning: DataSource connection transaction isolation should be READ_COMMITTED, but it is currently NONE.
  |                          Using an isolation level less strict than READ_COMMITTED may lead to data consistency problems.
  |                          Using an isolation level more strict than READ_COMMITTED may lead to deadlock.
  | 
i added transaction isolation to my project-ds.xml like
anonymous wrote :         <transaction-isolation>TRANSACTION_SERIALIZABLE</transaction-isolation>
  | 
but don't know why still I get this warning? maybe for tomcat, transaction isolation should be in some other place?

anonymous wrote : 
  | (JBossTimerServiceFactory.java:restoreTimerService:112)  -TIMER SERVICE IS NOT INSTALLED
  | WARN  14-08 14:07:53,656 (JBossTimerServiceFactory.java:restoreTimerService:112)  -TIMER SERVICE IS NOT INSTALLED
  | 
Why I get twice timmer service warn?

anonymous wrote : 
  | WARN  14-08 14:08:08,515 (Component.java:checkScopeForComponentType:351)  -Stateful session beans was bound to the APPLICATION context - note that it is not safe to make concurrent calls to the bean: collectionControler
  | 
what this means?

and finally what this means?
anonymous wrote : 
  | WARN  14-08 14:06:56,406 (UnifiedLoaderRepository3.java:addClassLoader:675)  -Tried to add non-URLClassLoader.  Ignored
  | WARN  14-08 14:06:59,937 (TxControl.java::266)  -[com.arjuna.ats.arjuna.coordinator.TxControl_1] - Name of XA node not defined. Using 531e3530:e99:46c19ae3:0
  | WARN  14-08 14:07:08,359 (JDBCPersistenceManager.java:start:143)  -
  | 

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