Testing scenario: Create cluster of 3 nodes using upstream kube ping protocol. With multiple clients make http requests against such cluster for a while.
We did not notice functional failure of test. Part of test is checking for unknown error messages in log so that is why we noticed. Can you have a look if it is useful to have this error message in logs?
From attached log you can see, that error message show up on the beginning of test when cluster was just forming.
I have found similar issue https://issues.redhat.com/browse/JBEAP-17191.