Cant access Variables through the Admin module

Flowable Engine
1

HI there.

I have a process which contain a following part of BPM model:

image

I can successfully finish a whole process - I can access the variables through the Admin app.

But when process goes in a boundary event branch, I can still finish the process but when I try to access Variables through the Admin app, I cant access them. Also, Ive tried putting a user task before I finish the whole process in boundary event branch and when Ive checked the Variabels in Admin app and I cant access them (picture above).

Also, I can access the variables through the service task in process(in the boundary event branch).

At the same time, I get multiple errors in logs:

  • List item o.f.c.e.impl.interceptor.CommandContext : Error while closing command context, java.lang.NullPointerException: nul

  • List item Unhandled exception, java.lang.NullPointerException: null atrg.flowable.engine.impl.variable.ParallelMultiInstanceLoopVariableType.getValue(ParallelMultiInstanceLoopVariableType.java:84)

  • List item .f.u.a.r.c.ProcessInstanceClientResource : Error getting variables for process instance XXX org.flowable.ui.admin.service.engine.exception.FlowableServiceException: An error occurred while calling Flowable: HTTP/1.1 500

Is that connected to the boundary event or is something else in question (in code)?

Kind regards,
V.

2

That shouldn’t happen. However, we would need a reproducable XML for that.

This also is strange, however in the snippet you shared there’s no multi-instance so it’s hard to say anything here …

That is strange - a user task is a wait state and you should be able to see the variables .That you don’t see the variables when executing an automatic step (such as the service task), is normal.

3

Hi joram,

sorry for my late response.

Thank you on your answer I will provide XML soon.

Kind regards,
V

4

Hello joram,
this is the XML from the given example.

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:flowable="http://flowable.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.flowable.org/processdef" exporter="Flowable Open Source Modeler" exporterVersion="6.7.2">
  <process id="sfs_main_process" name="SFS main process" isExecutable="true" flowable:candidateStarterUsers="admin">
    <startEvent id="startEvent1" flowable:initiator="rest-admin" flowable:formFieldValidation="true"></startEvent>
    <exclusiveGateway id="sid-C9E3BCE6-9FA6-4F5A-A5FE-93B87650F982" name="service details included?"></exclusiveGateway>
    <scriptTask id="sid-7EED1F52-A4FB-4AE9-8FDA-38E92E71B8CF" name="Retreive service details from OM" scriptFormat="javascript" flowable:autoStoreVariables="false">
      <script><![CDATA[java.lang.System.out.println("Retriece service details");]]></script>
    </scriptTask>
    <scriptTask id="sid-27F439FB-1F20-4302-B813-FA22A8791F0D" name="Store order to service inventory" scriptFormat="javascript" flowable:autoStoreVariables="false">
      <script><![CDATA[java.lang.System.out.println("Store service inventory");]]></script>
    </scriptTask>
    <scriptTask id="sid-5D33AA3B-3762-4AF4-A789-A7A691E606CE" name="Notify OM" scriptFormat="javascript" flowable:autoStoreVariables="false">
      <script><![CDATA[java.lang.System.out.println("Notify OM");]]></script>
    </scriptTask>
    <serviceTask id="sid-BD54F509-1049-4E6F-93A8-2317AAF771EE" name="Check order" flowable:class="service.CheckServiceOrderItem"></serviceTask>
    <sequenceFlow id="sid-92976CD2-29D2-4D12-AB2E-C90CC143DCCB" sourceRef="startEvent1" targetRef="sid-BD54F509-1049-4E6F-93A8-2317AAF771EE"></sequenceFlow>
    <serviceTask id="sid-39F03762-6ACD-473D-A1F7-5A4FE7E6E926" name="Decompose order" flowable:class="service.FillServiceProcesses"></serviceTask>
    <serviceTask id="sid-21F2317C-9C88-479D-97BB-8687146202A3" name="Retreive service catalog details" flowable:class="service.FillServiceOrderItem"></serviceTask>
    <sequenceFlow id="sid-9372D8FD-F555-43E5-B37A-B1AD623C4421" sourceRef="sid-7EED1F52-A4FB-4AE9-8FDA-38E92E71B8CF" targetRef="sid-21F2317C-9C88-479D-97BB-8687146202A3"></sequenceFlow>
    <sequenceFlow id="sid-4E06D58B-D481-4F46-8CF4-25E1DF7F2A27" sourceRef="sid-21F2317C-9C88-479D-97BB-8687146202A3" targetRef="sid-39F03762-6ACD-473D-A1F7-5A4FE7E6E926"></sequenceFlow>
    <callActivity id="sfs" name="Call sub-processes" flowable:async="true" calledElement="${test.process}" flowable:calledElementType="key" flowable:businessKey="${test.id}" flowable:fallbackToDefaultTenant="false">
      <extensionElements>
        <flowable:in sourceExpression="${test.id}" target="itemId"></flowable:in>
        <flowable:in source="serviceOrder" target="serviceOrder"></flowable:in>
        <flowable:out source="serviceOrder" target="serviceOrder"></flowable:out>
        <flowable:out source="itemId"></flowable:out>
      </extensionElements>
      <multiInstanceLoopCharacteristics isSequential="false" flowable:collection="processList" flowable:elementVariable="test">
        <extensionElements>
          <flowable:variableAggregation target="newServiceOrder" createOverviewVariable="true">
            <variable sourceExpression="${test.id}" target="itemId"></variable>
            <variable source="serviceOrder" target="serviceOrder"></variable>
          </flowable:variableAggregation>
        </extensionElements>
      </multiInstanceLoopCharacteristics>
    </callActivity>
    <sequenceFlow id="sid-06F3E4C5-7C74-425F-9E53-AB82D0DB2987" sourceRef="sid-39F03762-6ACD-473D-A1F7-5A4FE7E6E926" targetRef="sfs"></sequenceFlow>
    <sequenceFlow id="sid-AE62895C-5A21-4A5B-BF08-B02D57807F55" sourceRef="sid-BD54F509-1049-4E6F-93A8-2317AAF771EE" targetRef="sid-C9E3BCE6-9FA6-4F5A-A5FE-93B87650F982"></sequenceFlow>
    <sequenceFlow id="sid-948E2E10-8722-48D9-9E96-A9B46656A5FA" name="No" sourceRef="sid-C9E3BCE6-9FA6-4F5A-A5FE-93B87650F982" targetRef="sid-7EED1F52-A4FB-4AE9-8FDA-38E92E71B8CF">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${serviceDetails == false}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="sid-1221F7B8-A565-45F0-828A-8AF458F72C83" sourceRef="sid-C9E3BCE6-9FA6-4F5A-A5FE-93B87650F982" targetRef="sid-39F03762-6ACD-473D-A1F7-5A4FE7E6E926">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${serviceDetails == true}]]></conditionExpression>
    </sequenceFlow>
    <serviceTask id="sid-80ABDC27-1A26-4606-9F8A-7F19F779B1F9" name="All sub processes finished?" flowable:async="true" flowable:class="tasks.checkIfCompleted"></serviceTask>
    <endEvent id="sid-A0D69847-4C9F-4088-83A5-287112415356"></endEvent>
    <serviceTask id="sid-C4EA93B3-D51F-4F60-9F41-DB624082097F" name="Data aggregation" flowable:class="tasks.aggregateData"></serviceTask>
    <scriptTask id="sid-A55B3D1C-5B60-4D9E-88B9-4B8D50022B5D" name="Store order to service inventory" scriptFormat="javascript" flowable:autoStoreVariables="false">
      <script><![CDATA[java.lang.System.out.println("Store service inventory");]]></script>
    </scriptTask>
    <scriptTask id="sid-F3525CBB-0275-456E-8ABC-8416373C8E9C" name="Notify OM" scriptFormat="javascript" flowable:autoStoreVariables="false">
      <script><![CDATA[java.lang.System.out.println("Notify OM");]]></script>
    </scriptTask>
    <sequenceFlow id="sid-63E315E1-311F-43C8-8479-D7185C6FC5D8" sourceRef="sfs" targetRef="sid-80ABDC27-1A26-4606-9F8A-7F19F779B1F9"></sequenceFlow>
    <sequenceFlow id="sid-F7594DA7-BA52-49C1-99D8-EC3BD6DAB466" sourceRef="sid-80ABDC27-1A26-4606-9F8A-7F19F779B1F9" targetRef="sid-C4EA93B3-D51F-4F60-9F41-DB624082097F"></sequenceFlow>
    <serviceTask id="sid-99857FC6-7A69-48A1-89F3-E5D905611329" name="List of roolbacks" flowable:async="true" flowable:class="tasks.roolbackList"></serviceTask>
    <callActivity id="sid-2BF7B07E-B8D9-4F38-88DA-5B16FB87C11D" name="Call rollback processes" flowable:async="true" calledElement="${roolback.process}" flowable:calledElementType="key" flowable:completeAsync="true" flowable:fallbackToDefaultTenant="false">
      <multiInstanceLoopCharacteristics isSequential="false" flowable:collection="roolbackList" flowable:elementVariable="roolback">
        <extensionElements></extensionElements>
      </multiInstanceLoopCharacteristics>
    </callActivity>
    <sequenceFlow id="sid-1159CCC5-6AEF-4BCA-BE67-2E2F1A4CEDB3" sourceRef="sid-D80901CF-57EE-4FE8-9E6D-E3F7581E32E4" targetRef="sid-99857FC6-7A69-48A1-89F3-E5D905611329"></sequenceFlow>
    <sequenceFlow id="sid-D4D127E8-3FCE-460D-9FE1-F20D05C382C8" sourceRef="sid-2BF7B07E-B8D9-4F38-88DA-5B16FB87C11D" targetRef="sid-A55B3D1C-5B60-4D9E-88B9-4B8D50022B5D"></sequenceFlow>
    <sequenceFlow id="sid-7535DAE8-F636-4A0F-BB48-1C6BB5F69340" sourceRef="sid-99857FC6-7A69-48A1-89F3-E5D905611329" targetRef="sid-2BF7B07E-B8D9-4F38-88DA-5B16FB87C11D"></sequenceFlow>
    <sequenceFlow id="sid-46DB4FD9-D056-4CEE-A778-39117633FD50" sourceRef="sid-A55B3D1C-5B60-4D9E-88B9-4B8D50022B5D" targetRef="sid-F3525CBB-0275-456E-8ABC-8416373C8E9C"></sequenceFlow>
    <sequenceFlow id="sid-97AD47E5-5B89-4AC5-A79F-AD9CF213D62F" sourceRef="sid-F3525CBB-0275-456E-8ABC-8416373C8E9C" targetRef="sid-A0D69847-4C9F-4088-83A5-287112415356"></sequenceFlow>
    <sequenceFlow id="sid-095A0268-78E6-4740-94E0-D39095932C9E" sourceRef="sid-C4EA93B3-D51F-4F60-9F41-DB624082097F" targetRef="sid-27F439FB-1F20-4302-B813-FA22A8791F0D"></sequenceFlow>
    <sequenceFlow id="sid-E5769E9E-5626-4ADA-B829-450A6CB4DC72" sourceRef="sid-27F439FB-1F20-4302-B813-FA22A8791F0D" targetRef="sid-5D33AA3B-3762-4AF4-A789-A7A691E606CE"></sequenceFlow>
    <sequenceFlow id="sid-0B321D05-8812-411E-BF26-D05C04D167A6" sourceRef="sid-5D33AA3B-3762-4AF4-A789-A7A691E606CE" targetRef="sid-A0D69847-4C9F-4088-83A5-287112415356"></sequenceFlow>
    <boundaryEvent id="sid-D80901CF-57EE-4FE8-9E6D-E3F7581E32E4" attachedToRef="sfs">
      <errorEventDefinition errorRef="asd" flowable:errorVariableLocalScope="true" flowable:errorVariableTransient="true"></errorEventDefinition>
    </boundaryEvent>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_sfs_main_process">
    <bpmndi:BPMNPlane bpmnElement="sfs_main_process" id="BPMNPlane_sfs_main_process">
      <bpmndi:BPMNShape bpmnElement="startEvent1" id="BPMNShape_startEvent1">
        <omgdc:Bounds height="30.0" width="30.0" x="0.0" y="150.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-C9E3BCE6-9FA6-4F5A-A5FE-93B87650F982" id="BPMNShape_sid-C9E3BCE6-9FA6-4F5A-A5FE-93B87650F982">
        <omgdc:Bounds height="40.0" width="40.0" x="282.5" y="145.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-7EED1F52-A4FB-4AE9-8FDA-38E92E71B8CF" id="BPMNShape_sid-7EED1F52-A4FB-4AE9-8FDA-38E92E71B8CF">
        <omgdc:Bounds height="80.0" width="100.0" x="252.5" y="285.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-27F439FB-1F20-4302-B813-FA22A8791F0D" id="BPMNShape_sid-27F439FB-1F20-4302-B813-FA22A8791F0D">
        <omgdc:Bounds height="79.99999999999999" width="100.0" x="1260.0000000000002" y="125.00000000000004"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-5D33AA3B-3762-4AF4-A789-A7A691E606CE" id="BPMNShape_sid-5D33AA3B-3762-4AF4-A789-A7A691E606CE">
        <omgdc:Bounds height="79.99999999999999" width="100.0" x="1515.0000000000005" y="123.00000000000001"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-BD54F509-1049-4E6F-93A8-2317AAF771EE" id="BPMNShape_sid-BD54F509-1049-4E6F-93A8-2317AAF771EE">
        <omgdc:Bounds height="80.0" width="100.0" x="105.0" y="123.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-39F03762-6ACD-473D-A1F7-5A4FE7E6E926" id="BPMNShape_sid-39F03762-6ACD-473D-A1F7-5A4FE7E6E926">
        <omgdc:Bounds height="80.0" width="100.0" x="510.0000000000001" y="123.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-21F2317C-9C88-479D-97BB-8687146202A3" id="BPMNShape_sid-21F2317C-9C88-479D-97BB-8687146202A3">
        <omgdc:Bounds height="80.0" width="100.0" x="510.0000000000001" y="285.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sfs" id="BPMNShape_sfs">
        <omgdc:Bounds height="80.0" width="100.0" x="675.0" y="120.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-80ABDC27-1A26-4606-9F8A-7F19F779B1F9" id="BPMNShape_sid-80ABDC27-1A26-4606-9F8A-7F19F779B1F9">
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      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-A0D69847-4C9F-4088-83A5-287112415356" id="BPMNShape_sid-A0D69847-4C9F-4088-83A5-287112415356">
        <omgdc:Bounds height="28.0" width="28.0" x="1755.0000000000005" y="149.00000000000003"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-C4EA93B3-D51F-4F60-9F41-DB624082097F" id="BPMNShape_sid-C4EA93B3-D51F-4F60-9F41-DB624082097F">
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      </bpmndi:BPMNShape>
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      </bpmndi:BPMNShape>
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      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-99857FC6-7A69-48A1-89F3-E5D905611329" id="BPMNShape_sid-99857FC6-7A69-48A1-89F3-E5D905611329">
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      </bpmndi:BPMNShape>
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      </bpmndi:BPMNShape>
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      </bpmndi:BPMNShape>
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      </bpmndi:BPMNEdge>
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      </bpmndi:BPMNEdge>
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      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="sid-06F3E4C5-7C74-425F-9E53-AB82D0DB2987" id="BPMNEdge_sid-06F3E4C5-7C74-425F-9E53-AB82D0DB2987" flowable:sourceDockerX="50.0" flowable:sourceDockerY="40.0" flowable:targetDockerX="50.0" flowable:targetDockerY="40.0">
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      <bpmndi:BPMNEdge bpmnElement="sid-D4D127E8-3FCE-460D-9FE1-F20D05C382C8" id="BPMNEdge_sid-D4D127E8-3FCE-460D-9FE1-F20D05C382C8" flowable:sourceDockerX="49.99999999999994" flowable:sourceDockerY="40.0" flowable:targetDockerX="50.0" flowable:targetDockerY="39.99999999999997">
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  </bpmndi:BPMNDiagram>
</definitions>

Issue here is that variables can’t be accessed through ADMIN app or REST but only if it the callActivity goes to boundary error event, in the other case where all sub processes from callActivity finish successfully without any errors and callActivity goes the normal way, it can be accessed through ADMIN app. Variables can also be accessed directly in process if it goes to boundary error event, was it in service task or user task.

Picture below shows how it looks in ADMIN app. Logs were given by vkras in first post.
Capture