I've deployed Flowable 6.3.1 through Apache tomcat.
Trying to model the following model the Flowable BpmnJsonConverter (which by the way I've got no idea what it has to do with CMMN modeling) throws NullPointerException.
CMMN model
The generated xml is as follows.
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/CMMN/20151109/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:flowable="http://flowable.org/cmmn" xmlns:cmmndi="http://www.omg.org/spec/CMMN/20151109/CMMNDI" xmlns:dc="http://www.omg.org/spec/CMMN/20151109/DC" xmlns:di="http://www.omg.org/spec/CMMN/20151109/DI" targetNamespace="http://www.flowable.org/casedef">
<case id="holidayRequest" name="HolidayRequest" flowable:initiatorVariableName="initiator">
<casePlanModel id="casePlanModel" flowable:formKey="requestHoliday">
<planItem id="planItem1" name="checkRequest" definitionRef="sid-0F1F1EF4-7661-4CC8-9AD7-4F2566DF989C">
<entryCriterion id="sid-43F0EC01-FD2F-417C-9CC7-46F0F3141D40" sentryRef="sentry1"></entryCriterion>
</planItem>
<planItem id="planItem2" name="isCheckNeeded" definitionRef="sid-C7C05BD3-1D12-4060-9AE8-FD5E4CB9DF94">
<itemControl>
<requiredRule></requiredRule>
</itemControl>
</planItem>
<sentry id="sentry1">
<ifPart>
<condition><![CDATA[${decisionNeeded == "true"}]]></condition>
</ifPart>
</sentry>
<humanTask id="sid-0F1F1EF4-7661-4CC8-9AD7-4F2566DF989C" name="checkRequest" flowable:candidateUsers="admin,boss" flowable:formKey="checkHoliday"></humanTask>
<decisionTask id="sid-C7C05BD3-1D12-4060-9AE8-FD5E4CB9DF94" name="isCheckNeeded" isBlocking="false">
<extensionElements>
<flowable:field name="decisionTaskThrowErrorOnNoHits">
<flowable:string><![CDATA[false]]></flowable:string>
</flowable:field>
</extensionElements>
</decisionTask>
</casePlanModel>
</case>
<cmmndi:CMMNDI>
<cmmndi:CMMNDiagram id="CMMNDiagram_holidayRequest">
<cmmndi:CMMNShape id="CMMNShape_casePlanModel" cmmnElementRef="casePlanModel">
<dc:Bounds height="424.0" width="580.0" x="40.0" y="40.0"></dc:Bounds>
<cmmndi:CMMNLabel></cmmndi:CMMNLabel>
</cmmndi:CMMNShape>
<cmmndi:CMMNShape id="CMMNShape_planItem1" cmmnElementRef="planItem1">
<dc:Bounds height="80.0" width="100.0" x="300.0" y="180.0"></dc:Bounds>
<cmmndi:CMMNLabel></cmmndi:CMMNLabel>
</cmmndi:CMMNShape>
<cmmndi:CMMNShape id="CMMNShape_sid-43F0EC01-FD2F-417C-9CC7-46F0F3141D40" cmmnElementRef="sid-43F0EC01-FD2F-417C-9CC7-46F0F3141D40">
<dc:Bounds height="22.0" width="14.0" x="292.58765691867626" y="227.54247101841793"></dc:Bounds>
<cmmndi:CMMNLabel></cmmndi:CMMNLabel>
</cmmndi:CMMNShape>
<cmmndi:CMMNShape id="CMMNShape_planItem2" cmmnElementRef="planItem2">
<dc:Bounds height="80.0" width="100.0" x="105.5" y="183.0"></dc:Bounds>
<cmmndi:CMMNLabel></cmmndi:CMMNLabel>
</cmmndi:CMMNShape>
<cmmndi:CMMNEdge id="CMMNEdge_sid-BDE0FC41-0461-4EAB-93E8-4E3E19709E7B" cmmnElementRef="sid-C7C05BD3-1D12-4060-9AE8-FD5E4CB9DF94" targetCMMNElementRef="sid-0F1F1EF4-7661-4CC8-9AD7-4F2566DF989C">
<di:waypoint x="205.44999999999806" y="222.2287917737789"></di:waypoint>
<di:waypoint x="299.99999999999847" y="220.77043701799485"></di:waypoint>
<cmmndi:CMMNLabel></cmmndi:CMMNLabel>
</cmmndi:CMMNEdge>
</cmmndi:CMMNDiagram>
</cmmndi:CMMNDI>
</definitions>
what do I need to do to fix it?
P.S. I previously had this problem and when I’ve tried to deploy it’s app it used to throw an Exception saying about extensionElement tag and the fact that it should not have child! but now it deploys without any exception.
EDIT-1: I've figured out the decision table reference was null so when I changed it to point out the decision table I got the same exception I mentioned previously in P.S. part. It's a CmmnXMLException. The stack-trace summary is as follows.
ERROR 19300 --- [nio-8090-exec-8] o.f.u.m.s.ModelImageService : Error creating thumbnail cmmn image 073fbc3d-b36b-11e8-ae0a-005056c00008 java.lang.NullPointerException: null at org.flowable.cmmn.image.impl.DefaultCaseDiagramGenerator.connectionPerfectionizer(DefaultCaseDiagramGenerator.java:393) ~[flowable-cmmn-image-generator-6.3.1.jar:6.3.1] at
org.flowable.cmmn.image.impl.DefaultCaseDiagramGenerator.drawAssociation(DefaultCaseDiagramGenerator.java:369) ~[flowable-cmmn-image-generator-6.3.1.jar:6.3.1] at
org.flowable.cmmn.image.impl.DefaultCaseDiagramGenerator.generateCaseDiagram(DefaultCaseDiagramGenerator.java:261) ~[flowable-cmmn-image-generator-6.3.1.jar:6.3.1] at
org.flowable.cmmn.image.impl.DefaultCaseDiagramGenerator.generateImage(DefaultCaseDiagramGenerator.java:222) ~[flowable-cmmn-image-generator-6.3.1.jar:6.3.1] at
org.flowable.cmmn.image.impl.DefaultCaseDiagramGenerator.generateImage(DefaultCaseDiagramGenerator.java:227) ~[flowable-cmmn-image-generator-6.3.1.jar:6.3.1] at
org.flowable.cmmn.image.impl.DefaultCaseDiagramGenerator.generatePngImage(DefaultCaseDiagramGenerator.java:232) ~[flowable-cmmn-image-generator-6.3.1.jar:6.3.1]
ERROR 19300 --- [nio-8090-exec-8] o.f.c.e.i.i.CommandContext: Error while closing command context
org.flowable.cmmn.converter.CmmnXMLException: cvc-complex-type.2.4.d: Invalid content was found starting with element 'extensionElements'. No child element is expected at this point. at
org.flowable.cmmn.converter.CmmnXmlConverter.convertToCmmnModel(CmmnXmlConverter.java:173) ~[flowable-cmmn-converter-6.3.1.jar:6.3.1] at
org.flowable.cmmn.engine.impl.parser.CmmnParserImpl.parse(CmmnParserImpl.java:89) ~[flowable-cmmn-engine-6.3.1.jar:6.3.1] at
org.flowable.cmmn.engine.impl.parser.CmmnParserImpl.parse(CmmnParserImpl.java:67) ~[flowable-cmmn-engine-6.3.1.jar:6.3.1]
Caused by: org.xml.sax.SAXParseException: cvc-complex-type.2.4.d: Invalid content was found starting with element 'extensionElements'. No child element is expected at this point. at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source) ~[xercesImpl-2.10.0.jar:?]
ERROR 19300 --- [nio-8090-exec-2] o.f.u.m.s.AppDefinitionPublishService : Invalid deploy result code: HTTP/1.1 500
EDIT-2: I tried to build the Case step by step and found out the CasePlanModel crashes in saving when a form is added to it. Also the modeler and engine has sever problems integrating decision task references.
