I deployed EPS and Poll to a stand-alone environment of Tomcat and ActiveMQ and letting the blocking connection idle results into an IllegalStateException:

May 27, 2014 2:32:07 PM org.icepush.BlockingConnectionServer run
WARNING: Exception caught on org.icepush.BlockingConnectionServer TimerTask.
java.lang.RuntimeException: java.lang.IllegalStateException: The request associated with the AsyncContext has already completed processing.
        at org.icepush.BlockingConnectionServer.respondIfPendingRequest(BlockingConnectionServer.java:180)
        at org.icepush.BlockingConnectionServer.run(BlockingConnectionServer.java:109)
        at java.util.TimerThread.mainLoop(Timer.java:512)
        at java.util.TimerThread.run(Timer.java:462)
Caused by: java.lang.IllegalStateException: The request associated with the AsyncContext has already completed processing.
        at org.apache.catalina.core.AsyncContextImpl.check(AsyncContextImpl.java:535)
        at org.apache.catalina.core.AsyncContextImpl.complete(AsyncContextImpl.java:92)
        at org.icepush.servlet.AsyncAdaptingServlet$AsyncRequestResponse.respondWith(AsyncAdaptingServlet.java:69)
        at com.icesoft.icepush.AdjustHeartbeatServer$HeartbeatRequest.respondWith(AdjustHeartbeatServer.java:66)
        at org.icepush.SequenceTaggingServer$TaggingRequest.respondWith(SequenceTaggingServer.java:67)
        at org.icepush.BlockingConnectionServer.respondIfPendingRequest(BlockingConnectionServer.java:177)
        ... 3 more