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From "Reinald Verheij (JIRA)" <j...@apache.org>
Subject [jira] [Created] (POOL-337) EvictionTimer does not remove cancelled tasks from the executor, leading to an IllegalStateException when the evictor attempts to evict
Date Tue, 30 Jan 2018 11:50:00 GMT
Reinald Verheij created POOL-337:
------------------------------------

             Summary: EvictionTimer does not remove cancelled tasks from the executor, leading
to an IllegalStateException when the evictor attempts to evict
                 Key: POOL-337
                 URL: https://issues.apache.org/jira/browse/POOL-337
             Project: Commons Pool
          Issue Type: Bug
    Affects Versions: 2.5.0
            Reporter: Reinald Verheij


EvictionTimer does not remove cancelled tasks from the executor, leading to an IllegalStateException
when the evictor attempts to evict.

 

EvictionTimer::schedule() adds eviction tasks to the executor, but the cancel does not remove
it. This is asymmetric and leads to the following exception:
{noformat}
java.lang.IllegalStateException: Pool not open
	at org.apache.commons.pool2.impl.BaseGenericObjectPool.assertOpen(BaseGenericObjectPool.java:713)
	at org.apache.commons.pool2.impl.GenericObjectPool.evict(GenericObjectPool.java:721)
	at org.apache.commons.pool2.impl.BaseGenericObjectPool$Evictor.run(BaseGenericObjectPool.java:1077)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748){noformat}

I think the cancel would need to remember the future which returned from {{executor::scheduleWithFixedDelay()}}
in {{schedule()}} and then do something like this {code}if (futures.containsKey(task)) {
    futures.remove(task).cancel(false);
    executor.purge();
}{code}



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