topic Null-Pointer Exception in ProcessInstanceResource.java in Alfresco Archive https://connect.hyland.com/t5/alfresco-archive/null-pointer-exception-in-processinstanceresource-java/m-p/105334#M73647 <HTML><HEAD></HEAD><BODY><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>I tried to enable the history-feature for variables with&nbsp; &lt;property name="history" value="full" /&gt; in activiti-context.xml in order to see variable updates via the rest method "ProcessInstance/{processId}".</SPAN><BR /><BR /><SPAN>My process contains null-values by default because some variables are set in later tasks.</SPAN><BR /><BR /><SPAN>No, I wanted to test the feature and figured out that this is a problem:</SPAN><BR /><PRE class="language-none line-numbers"><CODE><BR /> private void addVariableList(String processInstanceId, ObjectNode responseJSON) {<BR />&nbsp;&nbsp;&nbsp; List&lt;HistoricDetail&gt; variableList = ActivitiUtil.getHistoryService()<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .createHistoricDetailQuery()<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .processInstanceId(processInstanceId)<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .variableUpdates()<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .orderByTime()<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .desc()<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .list();<BR />&nbsp;&nbsp;&nbsp; <BR />&nbsp;&nbsp;&nbsp; if(variableList != null &amp;&amp; variableList.size() &gt; 0) {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ArrayNode variablesJSON = new ObjectMapper().createArrayNode();<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; responseJSON.put("variables", variablesJSON);<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for (HistoricDetail historicDetail : variableList) {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; HistoricVariableUpdate variableUpdate = (HistoricVariableUpdate) historicDetail;<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ObjectNode variableJSON = new ObjectMapper().createObjectNode();<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; variableJSON.put("variableName", variableUpdate.getVariableName());<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; variableJSON.put("variableValue", variableUpdate.getValue().toString());<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; variableJSON.put("variableType", variableUpdate.getVariableTypeName());<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; variableJSON.put("revision", variableUpdate.getRevision());<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; variableJSON.put("time", RequestUtil.dateToString(variableUpdate.getTime()));<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; variablesJSON.add(variableJSON);<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<BR />&nbsp;&nbsp;&nbsp; }<BR />&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>‍</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 /><SPAN>The exception happens at </SPAN><BR /><BR /><SPAN>variableJSON.put("variableValue", variableUpdate.getValue().toString());</SPAN><BR /><BR /><SPAN>java.lang.NullPointerException</SPAN><BR /><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.activiti.rest.api.process.ProcessInstanceResource.addVariableList(ProcessInstanceResource.java:163)</SPAN><BR /><BR /><SPAN>because some of my variables are null. </SPAN><BR /><BR /><SPAN>I think it can be a normal condition that variables are null, so I think this is a bug.</SPAN><BR /><BR /><SPAN>Is there a bug-tracker where I can report this problem or is it sufficient to post it here in the forum?</SPAN><BR /><BR /><SPAN>All the best,</SPAN><BR /><SPAN>Thomas</SPAN></BODY></HTML> Fri, 20 Jul 2012 15:52:37 GMT hheg8837 2012-07-20T15:52:37Z Null-Pointer Exception in ProcessInstanceResource.java https://connect.hyland.com/t5/alfresco-archive/null-pointer-exception-in-processinstanceresource-java/m-p/105334#M73647 Hi all,I tried to enable the history-feature for variables with&nbsp; &lt;property name="history" value="full" /&gt; in activiti-context.xml in order to see variable updates via the rest method "ProcessInstance/{processId}".My process contains null-values by default because some variables are set in late Fri, 20 Jul 2012 15:52:37 GMT https://connect.hyland.com/t5/alfresco-archive/null-pointer-exception-in-processinstanceresource-java/m-p/105334#M73647 hheg8837 2012-07-20T15:52:37Z Re: Null-Pointer Exception in ProcessInstanceResource.java https://connect.hyland.com/t5/alfresco-archive/null-pointer-exception-in-processinstanceresource-java/m-p/105335#M73648 <HTML><HEAD></HEAD><BODY><SPAN>Yes, this is indeed a bug. You can file an issue on our JIRA </SPAN><A href="https://jira.codehaus.org/browse/ACT" rel="nofollow noopener noreferrer">https://jira.codehaus.org/browse/ACT</A></BODY></HTML> Mon, 23 Jul 2012 06:47:46 GMT https://connect.hyland.com/t5/alfresco-archive/null-pointer-exception-in-processinstanceresource-java/m-p/105335#M73648 frederikherema1 2012-07-23T06:47:46Z