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poll() is a blocking call and cannot be called on the Service thread [java]
com.tangosol.util.AssertionException: poll() is a blocking call and cannot be called on the Service thread	at com.tangosol.coherence.Component._assertFailed(Component.CDB:12)	at com.tangosol.coherence.Component._assert(Component.CDB:3)	at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.poll(Service.CDB:4)	at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.poll(Service.CDB:18)	at com.tangosol.coherence.component.util.daemon.queueProcessor.service.InvocationService.query(InvocationService.CDB:17)	at com.tangosol.coherence.component.util.safeService.SafeInvocationService.query(SafeInvocationService.CDB:1)	at com.jivesoftware.util.cache.CoherenceClusteredCacheFactory.doSynchronousClusterTask(CoherenceClusteredCacheFactory.java:274)	at org.jivesoftware.util.cache.CacheFactory.doSynchronousClusterTask(CacheFactory.java:502)	at com.jivesoftware.openfire.session.RemoteSession.doSynchronousClusterTask(RemoteSession.java:162)	at com.jivesoftware.openfire.session.RemoteClientSession.getActiveList(RemoteClientSession.java:47)	at org.jivesoftware.openfire.roster.Roster.broadcastPresence(Roster.java:568)	at org.jivesoftware.openfire.handler.PresenceUpdateHandler.broadcastUpdate(PresenceUpdateHandler.java:281)	at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:135)	at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:110)	at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:174)	at org.jivesoftware.openfire.PresenceRouter.handle(PresenceRouter.java:133)	at org.jivesoftware.openfire.PresenceRouter.route(PresenceRouter.java:69)	at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:75)	at org.jivesoftware.openfire.SessionManager$ClientSessionListener.onConnectionClose(SessionManager.java:1116)	at org.jivesoftware.openfire.net.VirtualConnection.notifyCloseListeners(VirtualConnection.java:190)	at org.jivesoftware.openfire.net.VirtualConnection.close(VirtualConnection.java:166)	at org.jivesoftware.openfire.http.HttpSession.close(HttpSession.java:159)	at com.jivesoftware.openfire.session.RemoteSessionTask.run(RemoteSessionTask.java:65)	at com.jivesoftware.openfire.session.ClientSessionTask.run(ClientSessionTask.java:46)	at com.jivesoftware.util.cache.CoherenceClusteredCacheFactory$1.run(CoherenceClusteredCacheFactory.java:321)	at com.tangosol.coherence.component.util.daemon.queueProcessor.service.InvocationService.onInvocationMessage(InvocationService.CDB:6)	at com.tangosol.coherence.component.util.daemon.queueProcessor.service.InvocationService$InvocationMessage.onReceived(InvocationService.CDB:32)	at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.onMessage(Service.CDB:9)	at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.onNotify(Service.CDB:123)	at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:35)	at java.lang.Thread.run(Unknown Source)