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Re: Restart JBPM5 Process after system crash
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created by <a href="https://community.jboss.org/people/swaminathan.bhaskar">Swaminathan Bhaskar</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/741104#741104">View the full discussion</a>
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<div class="jive-rendered-content"><p>Is this the correct way to identify and restart a crashed process instance ?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre>                    ksession = JPAKnowledgeService.loadStatefulKnowledgeSession(sessionId, kbase, null, env);
                    if (ksession != null) {
                         Collection instances = ksession.getProcessInstances();
                         if (instances != null && instances.size() > 0) {
                              for (ProcessInstance processInstance : instances) {
                                   System.out.printf("\n*** Restarting old Business process [%s]\n", processInstance.getProcessId());
                                   
                                   // Start the BPM process
                                   ksession.startProcessInstance(processInstance.getId());
                                   
                                   // Trigger the signal
                                   ksession.signalEvent("Trigger", null);
                                   
                                   // Did the process instance complete successfully ?
                                   if (processInstance.getState() == ProcessInstance.STATE_COMPLETED) {
                                        System.out.printf("\nBusiness process [%s] successfully completed after restart\n", processInstance.getProcessId());
                                   }
                              }
                         }
                    }
                    else {
                         System.out.println("***** WARNING: No session found for session-id " + sessionId);
                    }
</pre><p>This is not working and I get the following exception:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Hibernate: select sessioninf0_.id as id1_0_, sessioninf0_.lastModificationDate as lastModi2_1_0_, sessioninf0_.rulesByteArray as rulesByt3_1_0_, sessioninf0_.startDate as startDate1_0_, sessioninf0_.OPTLOCK as OPTLOCK1_0_ from SessionInfo s</p><p>essioninf0_ where sessioninf0_.id=?</p><p>0    11/06 20:43:55,210[main] ERROR drools.persistence.SingleSessionCommandService.rollbackTransaction  - Could not commit session</p><p>java.lang.NullPointerException</p><p>        at org.jbpm.persistence.processinstance.JPAProcessInstanceManager.getProcessInstances(JPAProcessInstanceManager.java:97)</p><p>        at org.jbpm.process.instance.ProcessRuntimeImpl.getProcessInstances(ProcessRuntimeImpl.java:200)</p><p>        at org.drools.common.AbstractWorkingMemory.getProcessInstances(AbstractWorkingMemory.java:1093)</p><p>        at org.drools.impl.StatefulKnowledgeSessionImpl.getProcessInstances(StatefulKnowledgeSessionImpl.java:292)</p><p>        at org.drools.command.runtime.process.GetProcessInstancesCommand.execute(GetProcessInstancesCommand.java:35)</p><p>        at org.drools.command.runtime.process.GetProcessInstancesCommand.execute(GetProcessInstancesCommand.java:28)</p><p>        at org.drools.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36)</p><p>        at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:345)</p><p>        at org.drools.command.impl.CommandBasedStatefulKnowledgeSession.getProcessInstances(CommandBasedStatefulKnowledgeSession.java:139)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Any ideas ?</p></div>
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