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java.lang.NullPointerException: 	at javax.xml.bind.DatatypeConverterImpl.guessLength(DatatypeConverterImpl.java:654)	at javax.xml.bind.DatatypeConverterImpl._parseBase64Binary(DatatypeConverterImpl.java:692)	at javax.xml.bind.DatatypeConverterImpl.parseBase64Binary(DatatypeConverterImpl.java:434)	at javax.xml.bind.DatatypeConverter.parseBase64Binary(DatatypeConverter.java:342)	at org.jivesoftware.openfire.sasl.ScramSha1SaslServer.getStoredKey(ScramSha1SaslServer.java:339)	at org.jivesoftware.openfire.sasl.ScramSha1SaslServer.generateServerFinalMessage(ScramSha1SaslServer.java:185)	at org.jivesoftware.openfire.sasl.ScramSha1SaslServer.evaluateResponse(ScramSha1SaslServer.java:114)	at org.jivesoftware.openfire.net.SASLAuthentication.handle(SASLAuthentication.java:361)	at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:177)	at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandler.java:177)	at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:690)	at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:417)	at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:47)	at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:765)	at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:109)	at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:417)	at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:47)	at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:765)	at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:407)	at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:236)	at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:417)	at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:47)	at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:765)	at org.apache.mina.core.filterchain.IoFilterEvent.fire(IoFilterEvent.java:74)	at org.apache.mina.core.session.IoEvent.run(IoEvent.java:63)	at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTask(OrderedThreadPoolExecutor.java:769)	at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTasks(OrderedThreadPoolExecutor.java:761)	at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.run(OrderedThreadPoolExecutor.java:703)	at java.lang.Thread.run(Thread.java:745)