Oracle WebLogic Server 12c has two types of queues: the queue and the distributed queue. The queue is a JMS resource targeted to a single Managed Server.
A distributed queue must be used when working with WebLogic clustering. The distributed queue is a logical entity that groups single queues distributed across the JMS servers and Managed Servers of the cluster but is accessible as a single and transparent JNDI name. JMS applications require that all resource and JNDI names be unique across the entire application environment, including the WebLogic domains involved, the clusters, Managed Servers, and JMS resources.
The members (queues) of the distributed queue can use weighted or uniform distribution.
Note
Use the uniformly distributed queue for JMS clustering. The weighted distribution is more complicated to create and manage and it is deprecated in WebLogic Server 12c.
A JMS queue must be created to handle the JMSApp application...