This has been seen on Sandbox [0] when testing for a fix [1]. Member-1 was the original leader, after isolation member-2 became the new leader, but the producer has failed on member-3.

CONTROLLER-1704 symptom is visible from Robot and CONTROLLER-1702 symptom is visible in karaf.log [2] of member-3, but there may be more clues between 07:07:04,481 and 07:09:30,875.

[0] https://logs.opendaylight.org/sandbox/jenkins091/controller-csit-3node-clustering-only-carbon/4/log.html.gz#s1-s12-t3-k2-k25-k1-k8
[1] https://git.opendaylight.org/gerrit/#/c/58194/3
[2] https://logs.opendaylight.org/sandbox/jenkins091/controller-csit-3node-clustering-only-carbon/4/odl3_karaf.log.gz