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Status Submitted
Created by Guest
Created on Jan 13, 2026

Change GPFS to use IP_BIND_ADDRESS_NO_PORT bind() option

Change GPFS to use IP_BIND_ADDRESS_NO_PORT bind() option so so that binds() on sockets meant to be used for a subsequent connect() do not  require that there's a totally unused port in the ephemeral port range for the  source IP.

We got an assert on a NSD Client because it could not find an ephemeral port:
 

2025-09-08_23:54:17.380-0500: Unknown error: err = 67, error source = Error making connection: ERR_SRC_MAKE_CONNECTION, error number = 16
2025-09-08_23:54:17.380-0500: [E] Network error on 7.169.61.33 <NODE NAME REDACTED> <c1n1160>, Check connectivity
2025-09-08_23:54:17.936-0500: [N] Starting mmsdrserv: enter
2025-09-08_23:54:17.936-0500: [N] Starting mmsdrserv: started child process rc: 0
2025-09-08_23:55:18.018-0500: [E] Address already in use
2025-09-08_23:55:18.018-0500: [X] The mmfs daemon is shutting down abnormally.
2025-09-08_23:55:18.019-0500: [I] Calling user exit script mmSignalHandler: event signalHandler, Async command /usr/lpp/mmfs/bin/mmsysmonc.
2025-09-08_23:55:18.028-0500: [N] mmfsd is shutting down.
2025-09-08_23:55:18.028-0500: [N] Reason for shutdown: LOGSHUTDOWN called (557689095)
2025-09-08_23:55:18.159-0500: mmcommon mmfsdown invoked. Subsystem: mmfs Status: active
 

This change would avoid this assert.

Idea priority Medium