When running a Policy Server which connects to backend LDAP User
Stores, from time to time, some ldap error 81 in the smps.log are
[14784/64][Wed Aug 09 2017 22:51:27][SmDsLdapConnMgr.cpp:1190]
[ERROR][sm-Ldap-02230] Error# '81' during search: 'error: Can't contact LDAP server' Search Query = 'objectclass=*'
This message might appear if the LDAP Store closes its connection on
its side. As per design, Policy Server needs the LDAP Store's
connections to be readily available. Policy Server won't end any
connection that the backend LDAP Store closes. When the Policy Server
then tries to use such a closed connection, the Policy Server will
report LDAP error 81. Straight after, Policy Server will also close
this connection and establish a new one with the same backend LDAP
Store. As such, the LDAP Store shouldn't close any connection for
timeout or other reason.
Policy Server all versions
To avoid this message, configure the LDAP Backend Store to never close
its connection with the Policy Server.