Alguien sabe que significa el mensaje que me da el log messages en el controlador de dominio?? como ven son a la misma hora y se repiten en todos los segundos, pero no se que es lo que falla, gracias

Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mailAlternateAddress) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mail) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mailAlternateAddress) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mail) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mailAlternateAddress) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mail) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mailAlternateAddress) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mail) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mailAlternateAddress) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: connection_read(84): no connection! Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mail) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mailAlternateAddress) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mail) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mailAlternateAddress) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mail) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mailAlternateAddress) index_param failed (18) Jun 10 16:55:07 imcpdc slapd[2762]: <= bdb_equality_candidates: (mail) index_param failed (18)