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javax.jms.JMSSecurityException: Unable to validate user: null	at org.hornetq.core.protocol.core.impl.ChannelImpl.sendBlocking(	at org.hornetq.core.client.impl.ClientSessionFactoryImpl.createSessionInternal(	at org.hornetq.core.client.impl.ClientSessionFactoryImpl.createSession(	at org.hornetq.jms.client.HornetQConnection.authorize(	at org.hornetq.jms.client.HornetQConnectionFactory.createConnectionInternal(	at org.hornetq.jms.client.HornetQConnectionFactory.createConnection(	at org.hornetq.jms.client.HornetQConnectionFactory.createConnection(	at com.thopentutorials.client.JMSApplicationClient.main(