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