# Get business key from delegateExecution fails with NullPointerException for True Async tasks

**URL:** <https://forum.flowable.org/t/get-business-key-from-delegateexecution-fails-with-nullpointerexception-for-true-async-tasks/8869>\
**Category:** Flowable Engine\
**Created:** [January 13, 2022, 3:48pm UTC](https://forum.flowable.org/t/get-business-key-from-delegateexecution-fails-with-nullpointerexception-for-true-async-tasks/8869 "2022-01-13T15:48:47Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![chavdarbaykov](https://avatars.discourse-cdn.com/v4/letter/c/da6949/32.png) [@chavdarbaykov](https://forum.flowable.org/u/chavdarbaykov)\
**Post date:** [January 13, 2022, 3:48pm UTC](https://forum.flowable.org/t/get-business-key-from-delegateexecution-fails-with-nullpointerexception-for-true-async-tasks/8869/1 "2022-01-13T15:48:47Z")

</div>

Hi, Folks,  
For true async service tasks it seems delegateExecution.getProcessInstanceBusinessKey() fails with null pointer exception.  
This one seems to fail only on certain async tasks.  
The process is extremely simple fork/join with 2 parralel true async service tasks.

```auto
java.lang.NullPointerException
	at org.flowable.engine.impl.util.CommandContextUtil.getExecutionEntityManager(CommandContextUtil.java:471)
	at org.flowable.engine.impl.util.CommandContextUtil.getExecutionEntityManager(CommandContextUtil.java:467)
	at org.flowable.engine.impl.persistence.entity.ExecutionEntityImpl.ensureProcessInstanceInitialized(ExecutionEntityImpl.java:489)
	at org.flowable.engine.impl.persistence.entity.ExecutionEntityImpl.getProcessInstance(ExecutionEntityImpl.java:483)
	at org.flowable.engine.impl.persistence.entity.ExecutionEntityImpl.getProcessInstanceBusinessKey(ExecutionEntityImpl.java:403)
	at com.paysafe.ss.flowable.common.context.BaseReadOnlyProcessContext.getProcessInstanceBusinessKey(BaseReadOnlyProcessContext.java:77)
	at com.paysafe.ss.flowable.common.ProcessLogger$ProcessExecutionLogEntry.create(ProcessLogger.java:73)
	at com.paysafe.ss.flowable.common.TimeTrackingExecutor.executeTask(TimeTrackingExecutor.java:31)
	at com.paysafe.ss.flowable.common.AsyncJavaTask.execute(AsyncJavaTask.java:33)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.mockito.internal.creation.bytebuddy.MockMethodAdvice.tryInvoke(MockMethodAdvice.java:213)
	at org.mockito.internal.creation.bytebuddy.MockMethodAdvice.access$400(MockMethodAdvice.java:35)
	at org.mockito.internal.creation.bytebuddy.MockMethodAdvice$RealMethodCall.invoke(MockMethodAdvice.java:165)
	at org.mockito.internal.invocation.InterceptedInvocation.callRealMethod(InterceptedInvocation.java:152)
	at org.mockito.internal.stubbing.answers.CallsRealMethods.answer(CallsRealMethods.java:44)
	at org.mockito.Answers.answer(Answers.java:100)
	at org.mockito.internal.handler.MockHandlerImpl.handle(MockHandlerImpl.java:103)
	at org.mockito.internal.handler.NullResultGuardian.handle(NullResultGuardian.java:29)
	at org.mockito.internal.handler.InvocationNotifierHandler.handle(InvocationNotifierHandler.java:33)
	at org.mockito.internal.creation.bytebuddy.MockMethodInterceptor.doIntercept(MockMethodInterceptor.java:61)
	at org.mockito.internal.creation.bytebuddy.MockMethodAdvice.handle(MockMethodAdvice.java:106)
	at com.paysafe.ss.flowable.common.AsyncJavaTask.execute(AsyncJavaTask.java:33)
	at com.paysafe.ss.flowable.common.AsyncJavaTask.execute(AsyncJavaTask.java:22)
	at org.flowable.engine.delegate.FlowableFutureJavaDelegate.lambda$execute$0(FlowableFutureJavaDelegate.java:35)
	at org.flowable.common.engine.impl.async.DefaultAsyncTaskExecutor.lambda$submit$0(DefaultAsyncTaskExecutor.java:115)
	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)

```

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<div class="post-metadata">

**Author:** ![chavdarbaykov](https://avatars.discourse-cdn.com/v4/letter/c/da6949/32.png) [@chavdarbaykov](https://forum.flowable.org/u/chavdarbaykov)\
**Post date:** [January 13, 2022, 3:51pm UTC](https://forum.flowable.org/t/get-business-key-from-delegateexecution-fails-with-nullpointerexception-for-true-async-tasks/8869/2 "2022-01-13T15:51:38Z")

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```auto
<?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: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" xmlns:flowable="http://flowable.org/bpmn" id="definitions" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.flowable.org/processdef">
  <process id="asyncProcess" name="asyncProcess">
    <startEvent id="start"/>
    <sequenceFlow id="start_flow1" sourceRef="start" targetRef="simpleServiceTask1"/>
    <serviceTask id="simpleServiceTask1" name="Simple Service Task" flowable:delegateExpression="${simpleServiceTask1}"/>
    <!-- Fork gateway -->
    <sequenceFlow id="parallelGateway_flow1" sourceRef="sid-1ac52630-cf71-424f-be0d-52d5e7025f34" targetRef="simpleServiceTask2"/>
    <sequenceFlow id="parallelGateway_flow2" sourceRef="sid-1ac52630-cf71-424f-be0d-52d5e7025f34" targetRef="simpleAsyncServiceTask"/>
    <serviceTask id="simpleServiceTask2" name="Simple Service Task 2" flowable:delegateExpression="${simpleServiceTask2}" flowable:exclusive="true" flowable:async="false">
      <extensionElements>
        <flowable:failedJobRetryTimeCycle>R3/PT5S</flowable:failedJobRetryTimeCycle>
      </extensionElements>
    </serviceTask>
    <serviceTask id="simpleAsyncServiceTask" name="Simple Async Service Task" flowable:delegateExpression="${simpleAsyncServiceTask}" flowable:exclusive="true" flowable:async="true">
      <extensionElements>
        <flowable:failedJobRetryTimeCycle>R2/PT1S</flowable:failedJobRetryTimeCycle>
      </extensionElements>
    </serviceTask>
    <sequenceFlow id="simpleServiceTask3_flow" sourceRef="simpleAsyncServiceTask" targetRef="theEnd"/>
    <!-- Join gateway -->
    <endEvent id="theEnd"/>
    <sequenceFlow id="sid-2830aa1d-25fe-4723-893c-c899a1661a5d" sourceRef="simpleServiceTask2" targetRef="theEnd"/>
    <parallelGateway id="sid-1ac52630-cf71-424f-be0d-52d5e7025f34"/>
    <sequenceFlow id="sid-682c41a0-382e-456c-b5ac-ef9e7e29390e" sourceRef="simpleServiceTask1" targetRef="sid-1ac52630-cf71-424f-be0d-52d5e7025f34"/>
  </process>
</definitions>

```

---

<div class="post-metadata">

**Author:** ![chavdarbaykov](https://avatars.discourse-cdn.com/v4/letter/c/da6949/32.png) [@chavdarbaykov](https://forum.flowable.org/u/chavdarbaykov)\
**Post date:** [January 14, 2022, 7:24am UTC](https://forum.flowable.org/t/get-business-key-from-delegateexecution-fails-with-nullpointerexception-for-true-async-tasks/8869/3 "2022-01-14T07:24:18Z")

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After some debugging i found, that for accessing the process engine configuration, it seems:  
ExecutionEntityImpl tries to get ExecutionEntityManager from some thread local variables:

```auto
    public static ExecutionEntityManager getExecutionEntityManager() {
        return getExecutionEntityManager(getCommandContext());
    }

    public static CommandContext getCommandContext() {
        return Context.getCommandContext();
    }

```

Which tries to get ProcessEngine Configuration from thread local variable.  
It seems to me that this CommandContext is not set upon spawning the async thread or not setup properly.

---

<div class="post-metadata">

**Author:** ![joram](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/joram/32/26_2.png) [@joram](https://forum.flowable.org/u/joram)\
**Post date:** [January 24, 2022, 3:55pm UTC](https://forum.flowable.org/t/get-business-key-from-delegateexecution-fails-with-nullpointerexception-for-true-async-tasks/8869/4 "2022-01-24T15:55:44Z")

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> [@chavdarbaykov](#):
>
> `simpleServiceTask2`

What’s the implementation of those async classes? Are you using your own threadpooling? If so, then indeed that will not work. In any way, check [True Parallel Service Task Execution with Flowable](https://www.flowable.com/blog/true-parallel-service-task-execution-with-flowable) which describes the way to achieve what you want.

---

<div class="post-metadata">

**Author:** ![chavdarbaykov](https://avatars.discourse-cdn.com/v4/letter/c/da6949/32.png) [@chavdarbaykov](https://forum.flowable.org/u/chavdarbaykov)\
**Post date:** [February 10, 2022, 4:57pm UTC](https://forum.flowable.org/t/get-business-key-from-delegateexecution-fails-with-nullpointerexception-for-true-async-tasks/8869/5 "2022-02-10T16:57:49Z")

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Some default Thread Pool of flowable is used. Will check and get back to you.