Not all the WebSphere MQ jars are installed on this machine. Message Broker requires that WebSphere MQ for Java is installed to work correctly.
Make sure that all the correct WebSphere MQ components are installed and that the CLASSPATH correctly contains the WebSphere MQ jar files.
rpm -ivh --prefix /opt/ibm/mqm /mnt/IIB9/MQSeriesRuntime-8.0.0-0.x86_64.rpm
rpm -ivh --prefix /opt/ibm/mqm /mnt/IIB9/MQSeriesServer-8.0.0-0.x86_64.rpm
rpm -ivh --prefix /opt/ibm/mqm /mnt/IIB9/MQSeriesJava-8.0.0-0.x86_64.rpm