32.2. Session reconnection

If the server is restarted after crashing or being stopped, sessions will no longer exist on the server and it will not be possible to re-attach completely transparently.

In this case, HornetQ automatically reconnects the connection and recreates any sessions and consumers on the server based on the sessions and consumers of the client. (This process is identical to fail-over onto a backup server.) Client reconnection is also used internally by components such as core bridges to let them reconnect to their target servers. See Section 37.2.1, “Automatic Client fail-over” for a full explanation of how transacted and non-transacted sessions are reconnected during fail-over, and the requirements of once-and-only-once delivery guarantees.