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Concurrent modification exception
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created by <a href="https://community.jboss.org/people/pavel.sknar">Pavel Sknar</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/739593#739593">View the full discussion</a>
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<div class="jive-rendered-content"><p>I have exception:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><table><tbody><tr><td style=";">Caused by: javax.persistence.RollbackException: Error while committing the transaction                                                                                          </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:93)                                                                                                    </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerSynchronization.afterCommit(ExtendedEntityManagerCreator.java:478)                     </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">... 24 more                                                                                                                                                             </td><td style=";"></td></tr><tr><td style=";">Caused by: java.util.ConcurrentModificationException                                                                                                                            </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at java.util.HashMap$HashIterator.nextEntry(HashMap.java:806)                                                                                                           </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at java.util.HashMap$KeyIterator.next(HashMap.java:841)                                                                                                                 </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.drools.marshalling.impl.OutputMarshaller.writeWorkItem(OutputMarshaller.java:1078)                                                                               </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.drools.persistence.info.WorkItemInfo.update(WorkItemInfo.java:134)                                                                                               </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)                                                                                                          </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)                                                                                        </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)                                                                                </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at java.lang.reflect.Method.invoke(Method.java:601)                                                                                                                     </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.ejb.event.BeanCallback.invoke(BeanCallback.java:37)                                                                                                    </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.ejb.event.EntityCallbackHandler.callback(EntityCallbackHandler.java:94)                                                                                </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.ejb.event.EntityCallbackHandler.preUpdate(EntityCallbackHandler.java:79)                                                                               </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.ejb.event.EJB3FlushEntityEventListener.invokeInterceptor(EJB3FlushEntityEventListener.java:61)                                                         </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.event.def.DefaultFlushEntityEventListener.handleInterception(DefaultFlushEntityEventListener.java:349)                                                 </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.event.def.DefaultFlushEntityEventListener.scheduleUpdate(DefaultFlushEntityEventListener.java:287)                                                     </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:155)                                                      </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:219)                                                          </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:99)                                             </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)                                                                         </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216)                                                                                                          </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383)                                                                                                    </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133)                                                                                           </td><td style=";"></td></tr><tr><td style=";">    </td><td style=";">at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:76)</td></tr></tbody></table></div>
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