MxRuntimeSystem/user/dispatchSupervisor#-597435171]] had already been terminated.

We have an environment that once and a while just stops working. When checking running now one can see multiple system task with no details. In the logs we have the error below. Obviously a null pointer error. We do have a scheduled event running before this error occurs but that one has already been finished normally before these errors are thrown.

Anybody a guess why the scheduled event runner can throw such a null pointer execption?

Regards,

Ronald

Apr  4 20:27:15.325 - ERROR - ActionManager: Exception in execution of monitored action 'null' (execution id: 06b760c3-b4b6-4ffb-8bc2-51f912c01671, execution type: SCHEDULED_EVENT)
Apr  4 20:27:15.326 - ERROR - ActionManager: (1/17) akka.pattern.AskTimeoutException: Recipient[Actor[akka://MxRuntimeSystem/user/dispatchSupervisor#-597435171]] had already been terminated.
Apr  4 20:27:15.326 - ERROR - ActionManager: (2/17) #011at akka.pattern.AskableActorRef$.ask$extension(AskSupport.scala:132)
Apr  4 20:27:15.326 - ERROR - ActionManager: (3/17) #011at akka.pattern.AskableActorRef$.$qmark$extension(AskSupport.scala:144)
Apr  4 20:27:15.326 - ERROR - ActionManager: (4/17) #011at com.mendix.core.session.ActionDispatching.sendAction(ActionDispatching.scala:32)
Apr  4 20:27:15.326 - ERROR - ActionManager: (5/17) #011at com.mendix.core.session.ActionDispatching.handleAction(ActionDispatching.scala:27)
Apr  4 20:27:15.326 - ERROR - ActionManager: (6/17) #011at com.mendix.systemwideinterfaces.core.IMonitoredAction$class.monitor(IMonitoredAction.scala:28)
Apr  4 20:27:15.326 - ERROR - ActionManager: (7/17) #011at com.mendix.core.actionmanagement.ScheduledAction$ScheduledRun.monitor(ScheduledAction.scala:118)
Apr  4 20:27:15.326 - ERROR - ActionManager: (8/17) #011at com.mendix.core.actionmanagement.ScheduledAction$ScheduledRun.run(ScheduledAction.scala:128)
Apr  4 20:27:15.326 - ERROR - ActionManager: (9/17) #011at com.mendix.core.actionmanagement.ScheduledAction.execute(ScheduledAction.scala:116)
Apr  4 20:27:15.327 - ERROR - ActionManager: (10/17) #011at com.mendix.core.actionmanagement.ScheduledAction.run(ScheduledAction.scala:98)
Apr  4 20:27:15.327 - ERROR - ActionManager: (11/17) #011at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
Apr  4 20:27:15.327 - ERROR - ActionManager: (12/17) #011at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
Apr  4 20:27:15.327 - ERROR - ActionManager: (13/17) #011at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
Apr  4 20:27:15.327 - ERROR - ActionManager: (14/17) #011at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
Apr  4 20:27:15.327 - ERROR - ActionManager: (15/17) #011at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
Apr  4 20:27:15.327 - ERROR - ActionManager: (16/17) #011at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
Apr  4 20:27:15.327 - ERROR - ActionManager: (17/17) #011at java.lang.Thread.run(Thread.java:745)