Hello,
Thank you very much for taking the time.
There is no Weblogic Coherence configuration at all, but the issue occurs in the log below on a redundant server while configuring a Session Cluster.
When starting the redundant containers, only one of the two containers' applications starts up normally.
After the issue occurred, the cluster configuration was deleted from the admin console, and “replicated_if_clustered” was removed from weblogic.xml, but the same issue continues to persist.
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Oracle Coherence GE 14.1.1.0 <Warning> (thread=Cluster, member=n/a): Received a discovery message that indicates the precence of an existing cluster that does not respond to join request; this is usually caused by a network layer failure: message "SeniorMemberHeartbeat"
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It is very similar to the log at the link below.
https://forums.oracle.com/ords/apexds/post/message-seniormemberheartbeat-2724