In Enterprise Server, if an application program uses the MQCONN API and the reconnect in an MIQM, the system will redirect the MQCONN API to the MQCONNX API. The system will also set the MQCNO-RECONNECT option on the MQCONNX API invocation.
Set the environment variable ES_XA_MQ to enable reconnection to the standby queue manager when the connection to the active queue manager is lost:
In addition, the environment variable MQSERVER can be set to enable Enterprise Server to verify that at least 2 connections are listed. For example:
MQSERVER=CHANNEL1/TCP/10.120.99.999(1414),10.120.98.888(1414)where each connection is separated by a comma.