Bug ID 965897: Disruption of mcpd with a segmentation fault during config sync

Last Modified: Jan 20, 2023

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,

Opened: Nov 19, 2020
Severity: 2-Critical


The mcpd process on the peer device fails with a segfault, restarts and then segfaults again in a loop Numerous messages may be logged in the "daemon" logfile of the following type: emerg logger[2020]: Re-starting mcpd


Continuous restarts of mcpd process on the peer device.


-- High availability (HA) configuration -- A port-and-address list configuration is changed to be only an address list -- A config sync occurs


One possible measure for getting the peer-machine "mcpd" out of its failure mode is to command the still-functioning system to push a "full" config sync to the appropriate device group. Doing this twice consecutively may be necessary. # tmsh run /cm config-sync force-full-load-push to-group APPROPRIATE-DEVICE-GROUP

Fix Information


Behavior Change