DSNL525I csect-name TCP/IP ENF80 MESSAGE LISTENER EXIT REGISTRATION FAILED WITH RETURN CODE return-code
Explanation
Db2 attempted to establish a listen exit with the system ENF facility so that Db2 could be notified of any TCP/IP LEAVE or JOIN sysplex events. However, the registration attempt failed with return code return-code.
Db2 only attempts this exit registration when its IP addresses are defined via the BSDS DDF IPV4 (GRPiPV4) or IPV6 (GRPIPV6) specifications. When a TCP/IP LEAVE sysplex event occurs, the dynamic VIPA facilities of the TCP/IP stack are terminated. When a TCP/IP JOIN sysplex event occurs, the dynamic VIPA facilities of the TCP/IP stack are restored. The registration attempt failed with return code return-code.
- csect-name
- The name of the control section that issued the message.
- return-code
- Hexadecimal value of the z/OS® ENFREQ macro return code.
System action
Db2 is not registered to listen to the ENF80 signal notification. However, Db2 then establishes a zero-depth, ephemeral port, member IP address-based listen socket that enables Db2 to be notified of an error against its member IP address. When such an event occurs, Db2 terminates its TCP/IP listener and periodically checks to determine if the TCP/IP facilities have become available before re-establishing its TCP/IP listener.
The Db2 DDF TCP/IP listener processing continues.
Operator response
Notify the system programmer
System programmer response
The attempt to register the listen exist can be retried only if DDF is stopped and started. If the problem persists, record the return-code and contact IBM® Support.
Severity
0 (informational)
