InterruptedException on shutdown

I see the following exception on shutdown with either default, all, production servers (using all's log4j configuration). I'm not sure it is necessary for users to see. Probably needs to be changed to DEBUG level if really not relevant.

09:07:59,647 WARN [NewMsgsWorker] Interrupted waiting for new msg check
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Object.java:474)
at EDU.oswego.cs.dl.util.concurrent.Semaphore.acquire(Semaphore.java:108)
at EDU.oswego.cs.dl.util.concurrent.SemaphoreControlledChannel.take(SemaphoreControlledChannel.java:131)
at org.jboss.resource.adapter.mail.inflow.NewMsgsWorker.run(NewMsgsWorker.java:75)
at org.jboss.resource.work.WorkWrapper.execute(WorkWrapper.java:204)
at org.jboss.util.threadpool.BasicTaskWrapper.run(BasicTaskWrapper.java:275)
at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:756)
at java.lang.Thread.run(Thread.java:595)