Hi,
are you using LDAP for the authentication purpose? what is sw version?
error you mentioned is specifically related to ldap server settings. can you verify that details are properly get replicated from master to peer.
also what is the setup mode ???TLS or TCP?
also verify if you have the same DNS server configured as master or a different server.
since the clsuter master doesn't report any error then there could be a possibility of a network issue as well.
Thnx
Alok