IBM WebSphere MQ and JMS/non-JMS consumers of messages

When the JMS Connector sends messages to IBM® WebSphere® MQ, it is capable of sending these messages in two different modes depending on the client which will read the provided messages. You can use the information provided here to know more this.

the messages are intended to be read by non-JMS clients (the default)
the messages are intended to be read by JMS clients

By default the Connector sends the messages so that they are intended to be read by non-JMS clients. The major difference between these two modes is that when the messages are intended to be read by non-JMS clients, the JMS properties are ignored. Thus a subsequent lookup on these properties will not find a match.

In order to switch to the "intended to be read by JMS clients" mode, the "Specific Driver Attributes" parameter value must contain the following line (apart from any other attributes specified): mq_nonjms=false