I remember like an year ago (or maybe more) I reported a problem we were having when using the compression filter. We were never able to find a way to reproduce it but it is still there. This post is just a summary of stack traces in case you can help us see what is gong on.
java.lang.ArrayIndexOutOfBoundsException at java.lang.System.arraycopy(Native Method) at com.jcraft.jzlib.ZStream.read_buf(ZStream.java:199) at com.jcraft.jzlib.Deflate.fill_window(Deflate.java:983) at com.jcraft.jzlib.Deflate.deflate_slow(Deflate.java:1120) at com.jcraft.jzlib.Deflate.deflate(Deflate.java:1567) at com.jcraft.jzlib.ZStream.deflate(ZStream.java:133) at org.apache.mina.filter.support.Zlib.deflate(Zlib.java:176) at org.apache.mina.filter.CompressionFilter.filterWrite(CompressionFilter.java:198) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:445) at org.apache.mina.common.support.AbstractIoFilterChain.access$1400(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:824) at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:227) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:445) at org.apache.mina.common.support.AbstractIoFilterChain.access$1400(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:824) at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.filterWrite(AbstractIoFilterChain.java:727) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:445) at org.apache.mina.common.support.AbstractIoFilterChain.fireFilterWrite(AbstractIoFilterChain.java:436) at org.apache.mina.transport.socket.nio.SocketSessionImpl.write0(SocketSessionImpl.java:196) at org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:149) at org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:135) at org.jivesoftware.openfire.nio.NIOConnection.deliver(NIOConnection.java:209) at org.jivesoftware.openfire.session.ClientSession.deliver(ClientSession.java:728) at org.jivesoftware.openfire.session.Session.process(Session.java:281) at org.jivesoftware.openfire.net.SocketPacketWriteHandler.process(SocketPacketWriteHandler.java:82) at org.jivesoftware.openfire.spi.PacketDelivererImpl.deliver(PacketDelivererImpl.java:48) at org.jivesoftware.openfire.spi.PresenceManagerImpl.probePresence(PresenceManagerImpl.java:381) at org.jivesoftware.openfire.handler.PresenceUpdateHandler.initSession(PresenceUpdateHandler.java:205) at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:104) at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:88) at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:151) at org.jivesoftware.openfire.PresenceRouter.handle(PresenceRouter.java:123) at org.jivesoftware.openfire.PresenceRouter.route(PresenceRouter.java:69) at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:75) at org.jivesoftware.openfire.net.StanzaHandler.processPresence(StanzaHandler.java:306) at org.jivesoftware.openfire.net.ClientStanzaHandler.processPresence(ClientStanzaHandler.java:85) at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:231) at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:153) at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandler.java:132) at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.messageReceived(AbstractIoFilterChain.java:703) at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:362) at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:800) at org.apache.mina.filter.codec.support.SimpleProtocolDecoderOutput.flush(SimpleProtocolDecoderOutput.java:62) at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:200) at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:362) at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:800) at org.apache.mina.filter.CompressionFilter.messageReceived(CompressionFilter.java:168) at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:362) at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:800) at org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java:266) at org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(ExecutorFilter.java:326) java.lang.ArrayIndexOutOfBoundsException at java.lang.System.arraycopy(Native Method) at com.jcraft.jzlib.ZStream.flush_pending(ZStream.java:170) at com.jcraft.jzlib.Deflate.deflate(Deflate.java:1527) at com.jcraft.jzlib.ZStream.deflate(ZStream.java:133) at org.apache.mina.filter.support.Zlib.deflate(Zlib.java:176) at org.apache.mina.filter.CompressionFilter.filterWrite(CompressionFilter.java:198) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:445) at org.apache.mina.common.support.AbstractIoFilterChain.access$1400(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:824) at org.apache.mina.filter.executor.ExecutorFilter.filterWrite(ExecutorFilter.java:292) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:445) at org.apache.mina.common.support.AbstractIoFilterChain.access$1400(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:824) at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:227) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:445) at org.apache.mina.common.support.AbstractIoFilterChain.access$1400(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:824) at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.filterWrite(AbstractIoFilterChain.java:727) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:445) at org.apache.mina.common.support.AbstractIoFilterChain.fireFilterWrite(AbstractIoFilterChain.java:436) at org.apache.mina.transport.socket.nio.SocketSessionImpl.write0(SocketSessionImpl.java:196) at org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:149) at org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:135) at org.jivesoftware.openfire.nio.NIOConnection.deliver(NIOConnection.java:209) java.io.IOException: Compression failed with return value : -5 at org.apache.mina.filter.support.Zlib.deflate(Zlib.java:181) at org.apache.mina.filter.CompressionFilter.filterWrite(CompressionFilter.java:198) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:445) at org.apache.mina.common.support.AbstractIoFilterChain.access$1400(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:824) at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:227) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:445) at org.apache.mina.common.support.AbstractIoFilterChain.access$1400(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:824) at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.filterWrite(AbstractIoFilterChain.java:727) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:445) at org.apache.mina.common.support.AbstractIoFilterChain.fireFilterWrite(AbstractIoFilterChain.java:436) at org.apache.mina.transport.socket.nio.SocketSessionImpl.write0(SocketSessionImpl.java:196) at org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:149) at org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:135) at org.jivesoftware.openfire.nio.NIOConnection.deliver(NIOConnection.java:209) at org.jivesoftware.openfire.session.ClientSession.deliver(ClientSession.java:728) at org.jivesoftware.openfire.session.Session.process(Session.java:281) at org.jivesoftware.openfire.IQRouter.handle(IQRouter.java:315) at org.jivesoftware.openfire.IQRouter.route(IQRouter.java:104) at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:67) at org.jivesoftware.openfire.net.StanzaHandler.processIQ(StanzaHandler.java:289) at org.jivesoftware.openfire.net.ClientStanzaHandler.processIQ(ClientStanzaHandler.java:79) at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:254) at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:153) at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandler.java:132) at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.messageReceived(AbstractIoFilterChain.java:703) at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:362) at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:800) at org.apache.mina.filter.codec.support.SimpleProtocolDecoderOutput.flush(SimpleProtocolDecoderOutput.java:62) at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:200) at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:362) at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilterChain.java:54) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:800) at org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java:266) java.io.IOException: Unknown error. Error code : -3 and message : unknown compression method at org.apache.mina.filter.support.Zlib.inflate(Zlib.java:137) at org.apache.mina.filter.CompressionFilter.messageReceived(CompressionFilter.java:159) at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:299) at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilterChain.java:53) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:648) at org.apache.mina.filter.support.SSLHandler.flushScheduledEvents(SSLHandler.java:275) at org.apache.mina.filter.SSLFilter.messageReceived(SSLFilter.java:427) at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:299) at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilterChain.java:53) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:648) at org.apache.mina.common.support.AbstractIoFilterChain$HeadFilter.messageReceived(AbstractIoFilterChain.java:499) at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:299) at org.apache.mina.common.support.AbstractIoFilterChain.fireMessageReceived(AbstractIoFilterChain.java:293) at org.apache.mina.transport.socket.nio.SocketIoProcessor.read(SocketIoProcessor.java:218) at org.apache.mina.transport.socket.nio.SocketIoProcessor.process(SocketIoProcessor.java:188) at org.apache.mina.transport.socket.nio.SocketIoProcessor.access$500(SocketIoProcessor.java:44) at org.apache.mina.transport.socket.nio.SocketIoProcessor$Worker.run(SocketIoProcessor.java:471) java.lang.ArrayIndexOutOfBoundsException: -1 at com.jcraft.jzlib.Tree.gen_codes(Tree.java:345) at com.jcraft.jzlib.Tree.build_tree(Tree.java:311) at com.jcraft.jzlib.Deflate._tr_flush_block(Deflate.java:860) at com.jcraft.jzlib.Deflate.flush_block_only(Deflate.java:772) at com.jcraft.jzlib.Deflate.deflate_slow(Deflate.java:1226) at com.jcraft.jzlib.Deflate.deflate(Deflate.java:1567) at com.jcraft.jzlib.ZStream.deflate(ZStream.java:133) at org.apache.mina.filter.support.Zlib.deflate(Zlib.java:174) at org.apache.mina.filter.CompressionFilter.filterWrite(CompressionFilter.java:192) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:361) at org.apache.mina.common.support.AbstractIoFilterChain.access$1300(AbstractIoFilterChain.java:53) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:659) at org.apache.mina.filter.executor.ExecutorFilter.filterWrite(ExecutorFilter.java:256) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:361) at org.apache.mina.common.support.AbstractIoFilterChain.access$1300(AbstractIoFilterChain.java:53) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:659) at org.apache.mina.filter.codec.ProtocolCodecFilter.filterWrite(ProtocolCodecFilter.java:210) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:361) at org.apache.mina.common.support.AbstractIoFilterChain.access$1300(AbstractIoFilterChain.java:53) at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:659) at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.filterWrite(AbstractIoFilterChain.java:587) at org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:361) at org.apache.mina.common.support.AbstractIoFilterChain.fireFilterWrite(AbstractIoFilterChain.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:221) Thanks, -- Gato