If there is a first authentication record, the chain of authentication records is used to authenticate digital certificates for secure client channels.
You can connect more than one ImqQueueManager object to the same queue manager. All use the same MQHCONN connection handle and share UOW functionality for the connection associated with the thread. The first ImqQueueManager to connect obtains the MQHCONN handle. The last ImqQueueManager to disconnect performs the MQDISC.
For a multithreaded program, each thread must use a separate ImqQueueManager object. Connections in different threads have different MQHCONN connection handles.
This method returns TRUE if successful. If it is called when there is no existing connection, the return code is also true.
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