I'm not sure of the exact issue here, but I did have some issues with the update and the BasicProperties parts of my code as well when I went from 2.4.1 to 2.5.0.<div><br></div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div><a href="http://www.rabbitmq.com/javadoc/com/rabbitmq/client/BasicProperties.html">http://www.rabbitmq.com/javadoc/com/rabbitmq/client/BasicProperties.html</a></div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div><a href="http://www.rabbitmq.com/javadoc/com/rabbitmq/client/impl/AMQBasicProperties.html">http://www.rabbitmq.com/javadoc/com/rabbitmq/client/impl/AMQBasicProperties.html</a><br></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><a href="http://www.rabbitmq.com/javadoc/com/rabbitmq/client/AMQP.BasicProperties.html">http://www.rabbitmq.com/javadoc/com/rabbitmq/client/AMQP.BasicProperties.html</a><br></div><div><br></div><div>These pages helped me through it though, my problem seems to be something similar to what you are facing.</div><div>&nbsp;</div>