Exception while executing dynamic workflow: Operation allowed only while eventLoop is running

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1

Hello,
I’m trying to run DSL workflow.
When I run a flow that executes an activity, I get following exception:
“Operation allowed only while eventLoop is running”

I am getting exception on executing dynamic activity:

activities.execute(action.getFunctionRef().getRefName(), ActResult.class, args)

Following is the error stacktrace:

{
  "message": "Failure handling event 7 of type 'EVENT_TYPE_WORKFLOW_TASK_STARTED' during execution. {WorkflowTaskStartedEventId=7, CurrentStartedEventId=7}",
  "source": "JavaSDK",
  "stackTrace": "io.temporal.internal.statemachines.WorkflowStateMachines.createEventProcessingException(WorkflowStateMachines.java:373)\nio.temporal.internal.statemachines.WorkflowStateMachines.handleEventsBatch(WorkflowStateMachines.java:297)\nio.temporal.internal.statemachines.WorkflowStateMachines.handleEvent(WorkflowStateMachines.java:260)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.applyServerHistory(ReplayWorkflowRunTaskHandler.java:247)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.handleWorkflowTaskImpl(ReplayWorkflowRunTaskHandler.java:231)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.handleWorkflowTask(ReplayWorkflowRunTaskHandler.java:165)\nio.temporal.internal.replay.ReplayWorkflowTaskHandler.handleWorkflowTaskWithQuery(ReplayWorkflowTaskHandler.java:133)\nio.temporal.internal.replay.ReplayWorkflowTaskHandler.handleWorkflowTask(ReplayWorkflowTaskHandler.java:98)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handleTask(WorkflowWorker.java:413)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handle(WorkflowWorker.java:320)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handle(WorkflowWorker.java:261)\nio.temporal.internal.worker.PollTaskExecutor.lambda$process$0(PollTaskExecutor.java:105)\njava.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\njava.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\njava.base/java.lang.Thread.run(Thread.java:1589)\n",
  "encodedAttributes": null,
  "cause": {
    "message": "WorkflowTask: failure executing SCHEDULED->WORKFLOW_TASK_STARTED, transition history is [CREATED->WORKFLOW_TASK_SCHEDULED]",
    "source": "JavaSDK",
    "stackTrace": "io.temporal.internal.statemachines.StateMachine.executeTransition(StateMachine.java:163)\nio.temporal.internal.statemachines.StateMachine.handleHistoryEvent(StateMachine.java:103)\nio.temporal.internal.statemachines.EntityStateMachineBase.handleEvent(EntityStateMachineBase.java:84)\nio.temporal.internal.statemachines.WorkflowStateMachines.handleSingleEvent(WorkflowStateMachines.java:419)\nio.temporal.internal.statemachines.WorkflowStateMachines.handleEventsBatch(WorkflowStateMachines.java:295)\nio.temporal.internal.statemachines.WorkflowStateMachines.handleEvent(WorkflowStateMachines.java:260)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.applyServerHistory(ReplayWorkflowRunTaskHandler.java:247)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.handleWorkflowTaskImpl(ReplayWorkflowRunTaskHandler.java:231)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.handleWorkflowTask(ReplayWorkflowRunTaskHandler.java:165)\nio.temporal.internal.replay.ReplayWorkflowTaskHandler.handleWorkflowTaskWithQuery(ReplayWorkflowTaskHandler.java:133)\nio.temporal.internal.replay.ReplayWorkflowTaskHandler.handleWorkflowTask(ReplayWorkflowTaskHandler.java:98)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handleTask(WorkflowWorker.java:413)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handle(WorkflowWorker.java:320)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handle(WorkflowWorker.java:261)\nio.temporal.internal.worker.PollTaskExecutor.lambda$process$0(PollTaskExecutor.java:105)\njava.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\njava.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\njava.base/java.lang.Thread.run(Thread.java:1589)\n",
    "encodedAttributes": null,
    "cause": {
      "message": "Operation allowed only while eventLoop is running",
      "source": "JavaSDK",
      "stackTrace": "io.temporal.internal.statemachines.WorkflowStateMachines.checkEventLoopExecuting(WorkflowStateMachines.java:1269)\nio.temporal.internal.statemachines.WorkflowStateMachines.randomUUID(WorkflowStateMachines.java:881)\nio.temporal.internal.replay.ReplayWorkflowContextImpl.scheduleActivityTask(ReplayWorkflowContextImpl.java:195)\nio.temporal.internal.sync.SyncWorkflowContext.executeActivityOnce(SyncWorkflowContext.java:304)\nio.temporal.internal.sync.SyncWorkflowContext.executeActivity(SyncWorkflowContext.java:278)\nio.temporal.internal.sync.ActivityStubImpl.executeAsync(ActivityStubImpl.java:59)\nio.temporal.internal.sync.ActivityStubBase.execute(ActivityStubBase.java:39)\nio.temporal.internal.sync.ActivityStubBase.execute(ActivityStubBase.java:34)\ncom.yubi.dsl.service.executor.impl.SequentialActionExecutor.execute(SequentialActionExecutor.java:75)\ncom.yubi.dsl.service.executor.impl.EventStateExecutor.executeActions(EventStateExecutor.java:90)\ncom.yubi.dsl.service.executor.impl.EventStateExecutor.executeState(EventStateExecutor.java:63)\ncom.yubi.dsl.service.DslWorkflowExecution.executeDslWorkflowFrom(DslWorkflowExecution.java:104)\ncom.yubi.dsl.service.DslWorkflowExecution.execute(DslWorkflowExecution.java:71)\nio.temporal.internal.sync.DynamicSyncWorkflowDefinition$RootWorkflowInboundCallsInterceptor.execute(DynamicSyncWorkflowDefinition.java:87)\nio.temporal.internal.sync.DynamicSyncWorkflowDefinition.execute(DynamicSyncWorkflowDefinition.java:66)\n",
      "encodedAttributes": null,
      "cause": null,
      "applicationFailureInfo": {
        "type": "java.lang.IllegalStateException",
        "nonRetryable": false,
        "details": null
      }
    },
    "applicationFailureInfo": {
      "type": "java.lang.RuntimeException",
      "nonRetryable": false,
      "details": null
    }
  },
  "applicationFailureInfo": {
    "type": "io.temporal.internal.statemachines.InternalWorkflowTaskException",
    "nonRetryable": false,
    "details": null
  }
}

Also, StartToClose time is set to 2sec for the activities.

I am using name: ‘temporal-sdk’, version: ‘1.22.0’
and name: ‘serverlessworkflow-api’, version: ‘4.0.5.Final’