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Date: Tue, 12 Jul 2011 14:47:13 -0500
From: "Terence M. Bandoian" <terence@tmbsw.com>
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To: Tomcat Users List <users@tomcat.apache.org>
Subject: Re: Terminating Timer Thread Gracefully
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  Hi, Kris-

I tried using ScheduledExecutorService but ran into the same problem.  
After awaiting termination:

             executorService.shutdown();

             try
             {
                 while ( !executorService.awaitTermination(
                     1, TimeUnit.SECONDS ) );

                 Thread.sleep( 1000 );
             }
             catch ( InterruptedException ie )
             {
             }

I still had to insert a call to Thread.sleep to prevent the error 
message from being written to the logs.

Thanks.

-Terence Bandoian

On 1:59 PM, Kris Schneider wrote:
> On Tue, Jul 12, 2011 at 7:59 AM, Caldarale, Charles R
> <Chuck.Caldarale@unisys.com>  wrote:
>>> From: Terence M. Bandoian [mailto:terence@tmbsw.com]
>>> Subject: Terminating Timer Thread Gracefully
>>> Finally, in contextDestroyed, I inserted a call to
>>> Thread.sleep after canceling the timer and the error
>>> message disappeared.
>> You should be able to do a Thread.join() using the timer's Thread object rather than sleeping.
> But Timer doesn't expose its thread. An alternative would be use
> something like Executors.newSingleThreadScheduledExecutor() to get a
> ScheduledExecutorService. The executor can be used to schedule a
> Runnable with a fixed rate or delay. When the context is destroyed,
> shutdown the executor and await its termination.
>
>>   - Chuck

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