FreeKB - Resolve MQRC_HOST_NOT_AVAILABLE with IBM MQ

JMSCMQ0001: WebSphere MQ call failed with compcode '2' ('MQCC_FAILED') reason '2538' ('MQRC_HOST_NOT_AVAILABLE')

Ensure nslookup can resolve the hostname
Ensure ping does not return "request timed out"
Ensure the status of the queue manager is "Running"
Ensure the port being used in the connection is configured on the listener
If there is a firewall between the requesting system and MQ server, ensure the listener port is open in the firewall
There is no need to check the MQ logs, as the request is not getting to the MQ server