2538 (09EA) (RC2538): MQRC_HOST_NOT_AVAILABLE
An MQCONN call was issued from a client to connect to a queue manager but the attempt to allocate a conversation to the remote system failed. Common causes of this reason code are:
- The listener has not been started on the remote system.
- The connection name in the client channel definition is incorrect.
- The network is currently unavailable.
- A firewall blocking the port, or protocol-specific traffic.
- The security call initializing the IBM® MQ client is blocked by a security exit on the SVRCONN channel at the server.
Examine the client error log for messages explaining the cause of the problem.
If you are using a Linux® server, and receiving a 2538 return code when trying to connect to a queue manager, ensure that you check your internal firewall configuration.
- To diagnose the problem, issue the following commands to temporarily turn off the internal
Linux firewall :
/etc/init.d/iptables save /etc/init.d/iptables stop
- To turn the internal Linux firewall back on,
issue the command:
- To permanently turn off the internal Linux
firewall, issue the command:
chkconfig iptables off