What does this log error mean?

I am currently using Openfire 3.6.0a. How do I go about fixing this? Thanks.

at org.apache.mina.common.support.AbstractIoFilterChain.access$1300(AbstractIoFilt erChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(Ab stractIoFilterChain.java:659)
at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.filterWrite(Abs tractIoFilterChain.java:587)
at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(Ab stractIoFilterChain.java:361)
at org.apache.mina.common.support.AbstractIoFilterChain.fireFilterWrite(AbstractIo FilterChain.java:355)
at org.apache.mina.transport.socket.nio.SocketSessionImpl.write0(SocketSessionImpl .java:166)
at org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:177)
at org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:168)
at org.jivesoftware.openfire.nio.NIOConnection.deliver(NIOConnection.java:242)
at org.jivesoftware.openfire.session.LocalClientSession.deliver(LocalClientSession .java:829)
at org.jivesoftware.openfire.session.LocalSession.process(LocalSession.java:262)
at org.jivesoftware.openfire.spi.RoutingTableImpl.routePacket(RoutingTableImpl.jav a:236)
at org.jivesoftware.openfire.net.SocketPacketWriteHandler.process(SocketPacketWrit eHandler.java:53)
at org.jivesoftware.openfire.spi.PacketDelivererImpl.deliver(PacketDelivererImpl.j ava:48)
at org.jivesoftware.openfire.spi.PresenceManagerImpl.probePresence(PresenceManager Impl.java:388)
at org.jivesoftware.openfire.handler.PresenceUpdateHandler.initSession(PresenceUpd ateHandler.java:230)
at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateH andler.java:128)
at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateH andler.java:112)
at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateH andler.java:176)
at org.jivesoftware.openfire.PresenceRouter.handle(PresenceRouter.java:134)
at org.jivesoftware.openfire.PresenceRouter.route(PresenceRouter.java:70)
at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:76)
at org.jivesoftware.openfire.net.StanzaHandler.processPresence(StanzaHandler.java: 329)
at org.jivesoftware.openfire.net.ClientStanzaHandler.processPresence(ClientStanzaH andler.java:85)
at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:253)
at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:175)
at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandl er.java:133)
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.common.IoFilterAdapter.messageReceived(IoFilterAdapter.java:80)
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.CompressionFilter.messageReceived(CompressionFilter.java :161)
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)

simple answer: wrong forum, post in the openfire forums.