java.lang.Exception: The job was aborted from outside Cromwell

Hi Team,

We are enabling Cromwell on AWS and using Cromwell version 39. While testing on five-dollar pipeline, we are facing subjected issue intermittently. There are instances wherein some tasks will complete in particular run successfully but get failed with this issue in subsequent executions.

Is it due to lack of resources or anything else? Please help on this and let me know if need further details.

java.lang.Exception: The job was aborted from outside Cromwell
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor$$anonfun$5.applyOrElse(WorkflowExecutionActor.scala:251)
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor$$anonfun$5.applyOrElse(WorkflowExecutionActor.scala:186)
        at scala.PartialFunction$OrElse.apply(PartialFunction.scala:168)
        at akka.actor.FSM.processEvent(FSM.scala:687)
        at akka.actor.FSM.processEvent$(FSM.scala:681)
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor.akka$actor$LoggingFSM$$super$processEvent(WorkflowExecutionActor.scala:51)
        at akka.actor.LoggingFSM.processEvent(FSM.scala:820)
        at akka.actor.LoggingFSM.processEvent$(FSM.scala:802)
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor.processEvent(WorkflowExecutionActor.scala:51)
        at akka.actor.FSM.akka$actor$FSM$$processMsg(FSM.scala:678)
        at akka.actor.FSM$$anonfun$receive$1.applyOrElse(FSM.scala:672)
        at akka.actor.Actor.aroundReceive(Actor.scala:517)
        at akka.actor.Actor.aroundReceive$(Actor.scala:515)
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor.akka$actor$Timers$$super$aroundReceive(WorkflowExecutionActor.scala:51)
        at akka.actor.Timers.aroundReceive(Timers.scala:55)
        at akka.actor.Timers.aroundReceive$(Timers.scala:40)
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor.aroundReceive(WorkflowExecutionActor.scala:51)
        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:588)
        at akka.actor.ActorCell.invoke(ActorCell.scala:557)
        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258)
        at akka.dispatch.Mailbox.run(Mailbox.scala:225)
        at akka.dispatch.Mailbox.exec(Mailbox.scala:235)
        at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
        at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
        at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
        at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

java.lang.Exception: The job was aborted from outside Cromwell
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor$$anonfun$5.applyOrElse(WorkflowExecutionActor.scala:251)
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor$$anonfun$5.applyOrElse(WorkflowExecutionActor.scala:186)
        at scala.PartialFunction$OrElse.apply(PartialFunction.scala:168)
        at akka.actor.FSM.processEvent(FSM.scala:687)
        at akka.actor.FSM.processEvent$(FSM.scala:681)
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor.akka$actor$LoggingFSM$$super$processEvent(WorkflowExecutionActor.scala:51)
        at akka.actor.LoggingFSM.processEvent(FSM.scala:820)
        at akka.actor.LoggingFSM.processEvent$(FSM.scala:802)
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor.processEvent(WorkflowExecutionActor.scala:51)
        at akka.actor.FSM.akka$actor$FSM$$processMsg(FSM.scala:678)
        at akka.actor.FSM$$anonfun$receive$1.applyOrElse(FSM.scala:672)
        at akka.actor.Actor.aroundReceive(Actor.scala:517)
        at akka.actor.Actor.aroundReceive$(Actor.scala:515)
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor.akka$actor$Timers$$super$aroundReceive(WorkflowExecutionActor.scala:51)
        at akka.actor.Timers.aroundReceive(Timers.scala:55)
        at akka.actor.Timers.aroundReceive$(Timers.scala:40)
        at cromwell.engine.workflow.lifecycle.execution.WorkflowExecutionActor.aroundReceive(WorkflowExecutionActor.scala:51)
        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:588)
        at akka.actor.ActorCell.invoke(ActorCell.scala:557)
        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258)
        at akka.dispatch.Mailbox.run(Mailbox.scala:225)