topic NullPointerException in AbstractBpmnActivityBehavior in Alfresco Archive https://connect.hyland.com/t5/alfresco-archive/nullpointerexception-in-abstractbpmnactivitybehavior/m-p/214113#M167243 <HTML><HEAD></HEAD><BODY><SPAN>Hell everybody,</SPAN><BR /><BR /><SPAN>I have migrated a web application from Activiti 5.8 to 5.17 and we have encountered a NPE when a subprocess is executed due to an ActivityExecution with a null activity.</SPAN><BR /><BR /><SPAN>The stack trace starts with :</SPAN><BR /><BR /><SPAN>&lt;i&gt;</SPAN><BR /><SPAN>2016-02-15 19:17:31,284 [nio-8080-exec-8] DEBUG [&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; o.a.e.i.i.CommandContext] Error while closing command context</SPAN><BR /><SPAN>java.lang.NullPointerException</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;at org.activiti.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior.hasCompensationHandler(AbstractBpmnActivityBehavior.java:54)</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;at org.activiti.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior.leave(AbstractBpmnActivityBehavior.java:43)</SPAN><BR /><SPAN>…</SPAN><BR /><SPAN>&lt;/i&gt;</SPAN><BR /><BR /><SPAN>The&nbsp; line 54 in AbstractBpmnActivityBehavior class throws a null pointer exception because execution.getActivity() returns null.</SPAN><BR /><BR /><PRE class="language-java line-numbers"><CODE><BR />execution.getActivity().getProperty(BpmnParse.PROPERTYNAME_COMPENSATION_HANDLER_ID) != null<BR /><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN></CODE></PRE><BR /><BR /><SPAN>We have spent a few hours debugging without being able to figure out why the execution is referencing a null activity at this point.</SPAN><BR /><BR /><SPAN>The full stack trace is attached. The main workflow and the subprocess are also attached.</SPAN><BR /><BR /><SPAN>For now I have modified the AbstractBpmnActivityBehavior class and added a test in the leave() method :</SPAN><BR /><BR /><PRE class="language-java line-numbers"><CODE><BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (execution.getActivity() != null) {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (hasCompensationHandler(execution)) {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; createCompensateEventSubscription(execution);<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (!hasLoopCharacteristics()) {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; super.leave(execution);<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } else if (hasMultiInstanceCharacteristics()) {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; multiInstanceActivityBehavior.leave(execution);<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } else {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; logger.error("Execution with null activity {}", execution.getId());<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<BR /><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN></CODE></PRE><BR /><BR /><SPAN>The behavior is ok, and the workflow is carried on to its end.</SPAN><BR /><BR /><SPAN>- Do you see a better fix for this issue ?</SPAN><BR /><BR /><SPAN>Thank for your help,</SPAN><BR /><SPAN>Best regards,</SPAN><BR /><SPAN>Eric</SPAN><BR /><BR /><BR /><BR /></BODY></HTML> Tue, 16 Feb 2016 09:25:19 GMT eric_manuguerra 2016-02-16T09:25:19Z NullPointerException in AbstractBpmnActivityBehavior https://connect.hyland.com/t5/alfresco-archive/nullpointerexception-in-abstractbpmnactivitybehavior/m-p/214113#M167243 Hell everybody,I have migrated a web application from Activiti 5.8 to 5.17 and we have encountered a NPE when a subprocess is executed due to an ActivityExecution with a null activity.The stack trace starts with :&lt;i&gt;2016-02-15 19:17:31,284 [nio-8080-exec-8] DEBUG [&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; o.a Tue, 16 Feb 2016 09:25:19 GMT https://connect.hyland.com/t5/alfresco-archive/nullpointerexception-in-abstractbpmnactivitybehavior/m-p/214113#M167243 eric_manuguerra 2016-02-16T09:25:19Z Re: NullPointerException in AbstractBpmnActivityBehavior https://connect.hyland.com/t5/alfresco-archive/nullpointerexception-in-abstractbpmnactivitybehavior/m-p/214114#M167244 <HTML><HEAD></HEAD><BODY><P>Hello <B>eric.manuguerra _</B>‌, having same problem here. Where did you change the <SPAN>AbstractBpmnActivityBehavior class</SPAN>?</P></BODY></HTML> Thu, 14 Jun 2018 20:15:11 GMT https://connect.hyland.com/t5/alfresco-archive/nullpointerexception-in-abstractbpmnactivitybehavior/m-p/214114#M167244 geravg 2018-06-14T20:15:11Z