There are two possibilities to check:
- The queue is marked as "Shared in cluster" with a cluster name, but the queue manager owner of that queue is not part of a queue manager cluster.
Either clear the "Shared in cluster" property or have the queue manager join the cluster.
- The queue property, Default Bind, might be set to "Not fixed," causing the queue manager to put the message(s) to any of the queue managers in the cluster where the shared queue is defined. The error 2270 will occur if a selected queue manager can not be reached. Change the property to "On open" so that the messages are sent to one queue manager.
After the fix, try putting the messages(s) again.