Hi!
When you send an Emoji character to a MUC chat room (don't know if this applies to "normal" chats, too) from your iPhone to a Openfire 3.7.1 server the connection is closed by the server.
Similar report under http://community.igniterealtime.org/message/218253#218253 and in consequence as issue http://issues.igniterealtime.org/browse/
OF-455 but due to the age of the thread, the different version and the different stacktrace I thought it might be not directly related.
Stacktrace for the error:
2012.10.30 15:49:36 org.jivesoftware.openfire.nio.ConnectionHandler - Closing connection due to error while processing message: <message to="5e7955c0f06f1c5b80802151cef25126_0@conference.chat.wywy.com" type="groupchat"><body>������</body></message>
java.lang.NumberFormatException: For input string: "?"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at org.jivesoftware.openfire.net.MXParser.more(MXParser.java:384)
at org.jivesoftware.openfire.net.MXParser.nextImpl(MXParser.java:85)
at org.xmlpull.mxp1.MXParser.nextToken(MXParser.java:1100)
at org.dom4j.io.XMPPPacketReader.parseDocument(XMPPPacketReader.java:317)
at org.dom4j.io.XMPPPacketReader.read(XMPPPacketReader.java:154)
at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:159)
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.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$1.messageReceive d(AbstractIoFilterChain.java:648)
at org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java :239)
at org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(Execut orFilter.java:283)
at java.util.concurrent.ThreadPoolExecutor.runWorker(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)
Best regards,
René