title: Could not commit session or rollback
body: <p>I am using jBPM5 and along with I have configured Bitronix Transaction Manager (BTM) as transaction manager to be used by jBPM process persistence unit.</p>
  
  <p>Everything works fine from past two weeks but suddenly it started failing with following exception, which results me in restarting of application server. After restarts everything works normal as expected.</p>
  
  <p>Exception Stacktrace:</p>
  
  <pre><code>com.xxx.jbpm.workflow.exception.WorkflowException: Could not commit session or rollback
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:97)
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:334)
    at com.xxx.platform.eventpublisher.xxxEventPublisher.publish(xxxEventPublisher.java:16)
    at com.xxx.xxx.wsserver.impl.dlp.DLPCheckTask.publish(DLPCheckTask.java:97)
    at com.xxx.xxx.wsserver.impl.dlp.DLPCheckTask.run(DLPCheckTask.java:56)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)
  Caused by: java.lang.RuntimeException: Could not commit session or rollback
    at org.drools.persistence.SingleSessionCommandService.rollbackTransaction(SingleSessionCommandService.java:406)
    at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:381)
    at org.drools.command.impl.CommandBasedStatefulKnowledgeSession.startProcessInstance(CommandBasedStatefulKnowledgeSession.java:237)
    at com.xxx.jbpm.workflow.services.WorkflowServiceHandler.startWorkflow(WorkflowServiceHandler.java:71)
    at com.xxx.jbpm.workflow.impl.WorkflowManagerImpl.startWorkflow(WorkflowManagerImpl.java:46)
    ... 12 more
  Caused by: java.lang.RuntimeException: Unable to rollback transaction
    at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:197)
    at org.drools.persistence.SingleSessionCommandService.rollbackTransaction(SingleSessionCommandService.java:402)
    ... 16 more
  Caused by: java.lang.IllegalStateException: no transaction started on this thread
    at bitronix.tm.BitronixTransactionManager.rollback(BitronixTransactionManager.java:150)
    at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:191)
    ... 17 more
  </code></pre>
  
  <p>We are initiating a good amount of transaction/workflows and using jbpm library version of 5.5.0.Final of jbpm-human-task-core, jbpm-bpmn2, jbpm-persistence-jpa. </p>
  
  <p>Could anybody please help me out to point to right direction?</p>
  
  <p>Many thanks,
  Mayank</p>