Exception with LiftActor

[Donald McLean]

Hi all,

Any thoughts on what would be causing this:

net.liftweb.actor.PingerException: edu.stsci.aofl.remote.PERIODIC_CHECK$@14d1f256 could not be scheduled on edu.stsci.aofl.remote.RequestPort$RequestPortActor@2b69ee9a
    at net.liftweb.actor.LAPinger$.schedule(LAPinger.scala:72) ~[lift-actor_2.11-2.6.2.jar:2.6.2]
    at edu.stsci.aofl.remote.RequestPort$RequestPortActor.handlePeriodicCheck(RequestPort.scala:199) [aofl.jar:na]
    at edu.stsci.aofl.remote.RequestPort$RequestPortActor$$anonfun$messageHandler$1.applyOrElse(RequestPort.scala:100) ~[aofl.jar:na]
    at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:36) ~[scala-library.jar:na]
    at net.liftweb.actor.LiftActor$class.execTranslate(LiftActor.scala:502) ~[lift-actor_2.11-2.6.2.jar:2.6.2]
    at edu.stsci.aofl.remote.RequestPort$RequestPortActor.execTranslate(RequestPort.scala:88) [aofl.jar:na]
    at net.liftweb.actor.SpecializedLiftActor$class.net$liftweb$actor$SpecializedLiftActor$$proc2(LiftActor.scala:305) [lift-actor_2.11-2.6.2.jar:2.6.2]
    at net.liftweb.actor.SpecializedLiftActor$$anonfun$net$liftweb$actor$SpecializedLiftActor$$processMailbox$1.apply$mcV$sp(LiftActor.scala:227) [lift-actor_2.11-2.6.2.jar:2.6.2]
    at net.liftweb.actor.SpecializedLiftActor$$anonfun$net$liftweb$actor$SpecializedLiftActor$$processMailbox$1.apply(LiftActor.scala:227) [lift-actor_2.11-2.6.2.jar:2.6.2]
    at net.liftweb.actor.SpecializedLiftActor$$anonfun$net$liftweb$actor$SpecializedLiftActor$$processMailbox$1.apply(LiftActor.scala:227) [lift-actor_2.11-2.6.2.jar:2.6.2]
    at net.liftweb.actor.SpecializedLiftActor$class.around(LiftActor.scala:241) [lift-actor_2.11-2.6.2.jar:2.6.2]
    at edu.stsci.aofl.remote.RequestPort$RequestPortActor.around(RequestPort.scala:88) [aofl.jar:na]
    at net.liftweb.actor.SpecializedLiftActor$class.net$liftweb$actor$SpecializedLiftActor$$processMailbox(LiftActor.scala:226) [lift-actor_2.11-2.6.2.jar:2.6.2]
    at net.liftweb.actor.SpecializedLiftActor$$anonfun$2$$anonfun$apply$mcV$sp$1.apply$mcV$sp(LiftActor.scala:190) [lift-actor_2.11-2.6.2.jar:2.6.2]
    at net.liftweb.actor.LAScheduler$$anonfun$9$$anon$2$$anon$3.run(LiftActor.scala:76) [lift-actor_2.11-2.6.2.jar:2.6.2]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_65]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_65]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_65]
Caused by: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@1a160f64 rejected from java.util.concurrent.ScheduledThreadPoolExecutor@2ed84ca5[Shutting down, pool size = 1, active threads = 0, queued tasks = 46, completed tasks = 719]
    at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2047) ~[na:1.8.0_65]
    at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:823) [na:1.8.0_65]
    at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:326) ~[na:1.8.0_65]
    at java.util.concurrent.ScheduledThreadPoolExecutor.schedule(ScheduledThreadPoolExecutor.java:549) ~[na:1.8.0_65]
    at java.util.concurrent.Executors$DelegatedScheduledExecutorService.schedule(Executors.java:732) ~[na:1.8.0_65]
    at net.liftweb.actor.LAPinger$.schedule(LAPinger.scala:73) ~[lift-actor_2.11-2.6.2.jar:2.6.2]
    ... 17 common frames omitted

[Brett Grace]

Caused by: java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@1a160f64 rejected from java.util.concurrent.ScheduledThreadPoolExecutor@2ed84ca5[Shutting down, pool size = 1, active threads = 0, queued tasks = 46, completed tasks = 719]

The docs for ScheduledThreadPoolExecutor say: 

shutdown()

Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted.

There remain 46 queued tasks but the ScheduledThreadPoolExecutor is in the "shutting down" state. This seems consistent with something calling shutdown() on the executor.

Not sure if this is what you're looking for or if you're really asking, "any ideas what's shutting down my ScheduledThreadPoolExecutor?"

[Donald McLean]

Duh.

Thank you Brett.

Actually, what I need is a way to find out when the executor is shut down - I have a pretty good idea what's shutting it down.

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