Concurrent modification exception
I have exception in JBPM 5.3 with using spring configuration.
public class ExecuteWorkItemHandler implements WorkItemHandler {
private TaskHandler taskHandler;
private ProcessManager processManager;
........
@Override
public void executeWorkItem(final WorkItem workItem, final WorkItemManager manager) {
new Thread(new Runnable() {
@Override
public void run() {
try {
result = taskHandler.execute(parameters);
} catch (Throwable th) {
log.error("Failed execute task handler: {} ({})", workItem.getId(), workItem.getName());
log.error("", th);
}
parameters.put("Result", result);
try {
processManager.completeWorkItem(workItem.getId(), parameters); // TODO Exception there
} catch (Throwable th) {
log.error("Exception in work item: {}", workItem.getName());
og.error("", th);
}
}
}).start();
}
}
Exception in work item: TestTask
.....
Caused by: javax.persistence.RollbackException: Error while committing the transaction
at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:93)
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerSynchronization.afterCommit(ExtendedEntityManagerCreator.java:478)
... 24 more
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:806)
at java.util.HashMap$KeyIterator.next(HashMap.java:841)
at org.drools.marshalling.impl.OutputMarshaller.writeWorkItem(OutputMarshaller.java:1078)
at org.drools.persistence.info.WorkItemInfo.update(WorkItemInfo.java:134)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.hibernate.ejb.event.BeanCallback.invoke(BeanCallback.java:37)
at org.hibernate.ejb.event.EntityCallbackHandler.callback(EntityCallbackHandler.java:94)
at org.hibernate.ejb.event.EntityCallbackHandler.preUpdate(EntityCallbackHandler.java:79)
at org.hibernate.ejb.event.EJB3FlushEntityEventListener.invokeInterceptor(EJB3FlushEntityEventListener.java:61)
at org.hibernate.event.def.DefaultFlushEntityEventListener.handleInterception(DefaultFlushEntityEventListener.java:349)
at org.hibernate.event.def.DefaultFlushEntityEventListener.scheduleUpdate(DefaultFlushEntityEventListener.java:287)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:155)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:219)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:99)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133)
at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:76)