We are run a 3 node MMR with Openldap 2.4.39 on Ubuntu 14.04 (trusty) Everything runs great with an occasional hiccup like this. I see the following in the logs that appear to be searches on the RID numbers that are used for config replicationL Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: syncprov_matchops: skipping relayed sid 003 Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: syncprov_matchops: skipping original sid 001 Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: syncprov_matchops: skipping relayed sid 003 Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: syncprov_matchops: skipping original sid 001 Imeadiately after this all changes show csn_too_old errors: Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: do_syncrep2: rid=004 cookie=rid=004,sid=001,csn=20151125103121.701210Z#000000#001#000000 Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: do_syncrep2: rid=004 CSN too old, ignoring 20151125103121.701210Z#000000#001#000000 (uid=JRIVAS21,ou=Users,dc=oreillyauto,dc=com) Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: do_syncrep2: rid=004 cookie=rid=004,sid=001,csn=20151125103121.705110Z#000000#001#000000 Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: do_syncrep2: rid=004 CSN too old, ignoring 20151125103121.705110Z#000000#001#000000 (uid=JRIVAS21,ou=Users,dc=oreillyauto,dc=com) Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: do_syncrep2: rid=004 cookie=rid=004,sid=001,csn=20151125103121.713760Z#000000#001#000000 Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: do_syncrep2: rid=004 CSN too old, ignoring 20151125103121.713760Z#000000#001#000000 (uid=ACERVANT4,ou=Users,dc=oreillyauto,dc=com) Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: do_syncrep2: rid=004 cookie=rid=004,sid=001,csn=20151125103121.718018Z#000000#001#000000 Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: do_syncrep2: rid=004 CSN too old, ignoring 20151125103121.718018Z#000000#001#000000 (uid=ACERVANT4,ou=Users,dc=oreillyauto,dc=com) Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: do_syncrep2: rid=004 cookie=rid=004,sid=001,csn=20151125103121.726847Z#000000#001#000000 Nov 25 04:31:22 tn-ldap-a-2 slapd[5931]: do_syncrep2: rid=004 CSN too old, ignoring 20151125103121.726847Z#000000#001#000000 (uid=KCOOPER10,ou=Users,dc=oreillyauto,dc=com) This happened on one node. The third node had the same replication error for a few miliseconds and then recovered. I am attaching the database config file as well. Thank you, Eric Speake Senior Systems Administrator Information Systems O'Reilly Auto Parts (417) 862-2674 Ext. 1975 (See attached file: olcDatabase={1}mdb.ldif)This communication and any attachments are confidential, protected by Communications Privacy Act 18 USCS � 2510, solely for the use of the intended recipient, and may contain legally privileged material. If you are not the intended recipient, please return or destroy it immediately. Thank you.