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java.lang.NullPointerException: 	at hudson.plugins.jabber.im.transport.JabberIMConnection.connect(JabberIMConnection.java:166)	at hudson.plugins.jabber.im.transport.JabberIMConnectionProvider.createConnection(JabberIMConnectionProvider.java:42)	at hudson.plugins.im.IMConnectionProvider.create(IMConnectionProvider.java:65)	at hudson.plugins.im.IMConnectionProvider.access$600(IMConnectionProvider.java:22)	at hudson.plugins.im.IMConnectionProvider$ConnectorRunnable.run(IMConnectionProvider.java:183)	at java.lang.Thread.run(Thread.java:662)