Checking the error logs, I have some “Queue full” errors like this:
2012.12.21 20:07:48 org.jivesoftware.openfire.muc.spi.MultiUserChatServiceImpl - Internal server error
java.lang.IllegalStateException: Queue full
at java.util.AbstractQueue.add(Unknown Source)
at org.jivesoftware.openfire.muc.spi.MultiUserChatServiceImpl.logConversation(Mult iUserChatServiceImpl.java:1140)
at org.jivesoftware.openfire.muc.spi.LocalMUCRoom.broadcast(LocalMUCRoom.java:1130 )
at org.jivesoftware.openfire.muc.cluster.BroadcastMessageRequest$1.run(BroadcastMe ssageRequest.java:69)
at org.jivesoftware.openfire.muc.cluster.MUCRoomTask.execute(MUCRoomTask.java:85)
at org.jivesoftware.openfire.muc.cluster.BroadcastMessageRequest.run(BroadcastMess ageRequest.java:67)
at org.jivesoftware.openfire.muc.spi.LocalMUCRoom.broadcast(LocalMUCRoom.java:1100 )
at org.jivesoftware.openfire.muc.spi.LocalMUCRoom.send(LocalMUCRoom.java:998)
at org.jivesoftware.openfire.muc.spi.LocalMUCRoom.sendPublicMessage(LocalMUCRoom.j ava:973)
at org.jivesoftware.openfire.muc.spi.LocalMUCUser.process(LocalMUCUser.java:289)
at org.jivesoftware.openfire.muc.spi.LocalMUCUser.process(LocalMUCUser.java:194)
at org.jivesoftware.openfire.muc.spi.MultiUserChatServiceImpl.processPacket(MultiU serChatServiceImpl.java:321)
at org.jivesoftware.openfire.component.InternalComponentManager$RoutableComponents .process(InternalComponentManager.java:587)
at org.jivesoftware.openfire.spi.RoutingTableImpl.routeToComponent(RoutingTableImp l.java:352)
at org.jivesoftware.openfire.spi.RoutingTableImpl.routePacket(RoutingTableImpl.jav a:237)
at org.jivesoftware.openfire.MessageRouter.route(MessageRouter.java:105)
at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:80)
at org.jivesoftware.openfire.SessionPacketRouter.route(SessionPacketRouter.java:11 4)
at org.jivesoftware.openfire.SessionPacketRouter.route(SessionPacketRouter.java:72 )
at org.jivesoftware.openfire.multiplex.MultiplexerPacketHandler.route(MultiplexerP acketHandler.java:188)
at org.jivesoftware.openfire.net.MultiplexerStanzaHandler.processRoute(Multiplexer StanzaHandler.java:101)
at org.jivesoftware.openfire.net.MultiplexerStanzaHandler.processUnknowPacket(Mult iplexerStanzaHandler.java:109)
at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:305)
at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:194)
at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandl er.java:169)
at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.messageReceived (AbstractIoFilterChain.java:570)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(Ab stractIoFilterChain.java:299)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilt erChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceive d(AbstractIoFilterChain.java:648)
at org.apache.mina.filter.codec.support.SimpleProtocolDecoderOutput.flush(SimplePr otocolDecoderOutput.java:58)
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecF ilter.java:185)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(Ab stractIoFilterChain.java:299)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilt erChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceive d(AbstractIoFilterChain.java:648)
at org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java :239)
at org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(Execut orFilter.java:283)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
at java.lang.Thread.run(Unknown Source)