My cluster logs are very similar to the above thread... was it ever addressed?
[SV] Already protecting connection with message security level 'sign'
[FTI] Stream already exists to node: false
[Channel IP to another cluster node member] Close()
GracefuleClose(1226) because of channel to remote endpoint another cluster node~ is closed
Cluster services stops and generates:
The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server serverName$. The target name used wasserverName. This indicates that the target server failed to decrypt the ticket provided by the client. This can occur when the target server principal name (SPN) is registered on an account other than the account the target service is using. Ensure that the target SPN is only registered on the account used by the server.
Roderick Lyons