When I try to slapadd initial data into an empty mdb backend, the slapadd hangs: $ /tmp/openldap-2.4.31/sbin/slapadd -w -S 1 -c -F /tmp/openldap-2.4.31/etc/slapd.d -b dc=example,dc=com -l /tmp/openldap-2.4.31/etc/initdb.ldif _#################### 100.00% eta none elapsed none fast! (does not return to a shell prompt. I have to INT it.) I add '-d -1' to get some debugging output and I get this after removing the data.mdb and lock.mdb created above: $ /tmp/openldap-2.4.31/sbin/slapadd -d -1 -w -S 1 -c -F /tmp/openldap-2.4.31/etc/slapd.d -b dc=example,dc=com -l /tmp/openldap-2.4.31/etc/initdb.ldif (lines removed for brevity but can be submitted if need be) 4f9ea9c0 => str2entry: "dn: ou=Users,dc=example,dc=com objectClass: organizationalUnit ou: Users " 4f9ea9c0 >>> dnPrettyNormal: <ou=Users,dc=example,dc=com> 4f9ea9c0 <<< dnPrettyNormal: <ou=Users,dc=example,dc=com>, <ou=users,dc=example,dc=com> 4f9ea9c0 <= str2entry(ou=Users,dc=example,dc=com) -> 0x6afeba8 4f9ea9c0 oc_check_required entry (ou=Users,dc=example,dc=com), objectClass "organizationalUnit" 4f9ea9c0 oc_check_allowed type "objectClass" 4f9ea9c0 oc_check_allowed type "ou" 4f9ea9c0 oc_check_allowed type "structuralObjectClass" 4f9ea9c0 => mdb_tool_entry_put( -1, "ou=Users,dc=example,dc=com" ) 4f9ea9c0 => mdb_dn2id("ou=users,dc=example,dc=com") 4f9ea9c0 <= mdb_dn2id: get failed: MDB_NOTFOUND: No matching key/data pair found (-30798) 4f9ea9c0 => mdb_dn2id_add 0x6: "ou=users,dc=example,dc=com" 4f9ea9c0 <= mdb_dn2id_add 0x6: 0 4f9ea9c0 => index_entry_add( 6, "ou=Users,dc=example,dc=com" ) 4f9ea9c0 mdb_idl_insert_keys: 6 [9bee355f] 4f9ea9c0 mdb_idl_insert_keys: 6 [ef1184ca] 4f9ea9c0 mdb_idl_insert_keys: 6 4f9ea9c0 <= index_entry_add( 6, "ou=Users,dc=example,dc=com" ) success 4f9ea9c0 => mdb_entry_encode(0x00000006): ou=Users,dc=example,dc=com 4f9ea9c0 <= mdb_entry_encode(0x00000006): ou=Users,dc=example,dc=com 4f9ea9c0 => mdb_dn2id("dc=example,dc=com") 4f9ea9c0 <= mdb_dn2id: got id=0x1 4f9ea9c0 => mdb_entry_decode: 4f9ea9c0 <= mdb_entry_decode 4f9ea9c0 => mdb_tool_entry_modify( 1, "(null)" ) (it's hung) Here is the /tmp/openldap-2.4.31/etc/initdb.ldif: ### BEGIN INITDB.LDIF dn: dc=example,dc=com objectClass: organization objectClass: dcObject dc: example o: example.com dn: cn=manager,dc=example,dc=com objectClass: organizationalRole objectClass: simpleSecurityObject cn: manager userPassword: {SSHA}asif dn: cn=replicator,dc=example,dc=com objectClass: organizationalRole objectClass: simpleSecurityObject cn: replicator userPassword: {SSHA}asif dn: ou=Groups,dc=example,dc=com objectClass: organizationalUnit ou: Groups dn: cn=LDAP Admins,ou=Groups,dc=example,dc=com objectClass: top objectClass: groupOfUniqueNames cn: LDAP Admins uniqueMember: cn=manager,dc=example,dc=com dn: ou=Users,dc=example,dc=com objectClass: organizationalUnit ou: Users ### END INITDB.LDIF I used the following slaptest commands to create the initial slapd.d/ directory from a slapd.conf file: $ /tmp/openldap-2.4.31/sbin/slaptest -u -f /tmp/openldap-2.4.31/etc/slapd.conf -F /tmp/openldap-2.4.31/etc/slapd.d config file testing succeeded $ /tmp/openldap-2.4.31/sbin/slaptest -f /tmp/openldap-2.4.31/etc/slapd.conf -F /tmp/openldap-2.4.31/etc/slapd.d 4f9eab15 mdb_db_open: database "dc=example,dc=com" cannot be opened, err 2. Restore from backup! 4f9eab15 backend_startup_one (type=mdb, suffix="dc=example,dc=com"): bi_db_open failed! (2) slap_startup failed (test would succeed using the -u switch) Here is the /tmp/openldap-2.4.31/etc/slapd.conf: ### BEGIN SLAPD.CONF include /tmp/openldap-2.4.31/etc/schema/core.schema include /tmp/openldap-2.4.31/etc/schema/cosine.schema include /tmp/openldap-2.4.31/etc/schema/nis.schema include /tmp/openldap-2.4.31/etc/schema/inetorgperson.schema argsfile /tmp/openldap-2.4.31/var/run/slapd.args pidfile /tmp/openldap-2.4.31/var/run/slapd.pid threads 8 tool-threads 2 idletimeout 0 writetimeout 0 reverse-lookup off loglevel stats serverid 1 ldap://boardwalk:2389 modulepath /tmp/openldap-2.4.31/libexec moduleload back_monitor.la moduleload back_mdb.la moduleload syncprov.la password-hash {SSHA} sizelimit unlimited database config rootdn "cn=manager,dc=example,dc=com" access to * by group="cn=LDAP Admins,ou=Groups,dc=example,dc=com" write by users read by * none database monitor rootdn "cn=manager,dc=example,dc=com" access to * by users read by * none database mdb suffix "dc=example,dc=com" rootdn "cn=manager,dc=example,dc=com" directory /tmp/openldap-2.4.31/var/data index objectClass eq index entryCSN eq index entryUUID eq syncrepl rid=001 provider=ldap://boardwalk:2389 type=refreshAndPersist retry="15 +" bindmethod=simple binddn="cn=replicator,dc=example,dc=com" credentials="asif" searchbase="dc=example,dc=com" starttls=no schemachecking=off syncrepl rid=002 provider=ldap://chance:2389 type=refreshAndPersist retry="15 +" bindmethod=simple binddn="cn=replicator,dc=example,dc=com" credentials="asif" searchbase="dc=example,dc=com" starttls=no schemachecking=off syncrepl rid=003 provider=ldap://freeparking:2389 type=refreshAndPersist retry="15 +" bindmethod=simple binddn="cn=replicator,dc=example,dc=com" credentials="asif" searchbase="dc=example,dc=com" starttls=no schemachecking=off mirrormode TRUE overlay syncprov syncprov-checkpoint 50 10 syncprov-sessionlog 100 access to attrs=userPassword by anonymous auth by self write by dn.exact="cn=replicator,dc=example,dc=com" read by * none access to * by group="cn=LDAP Admins,ou=Groups,dc=example,dc=com" write by dn.exact="cn=replicator,dc=example,dc=com" read by users read by * none limits dn.exact="cn=replicator,dc=example,dc=com" time.soft=unlimited time.hard=unlimited size.soft=unlimited size.hard=unlimited ### END SLAPD.CONF I compiled from the following source: OpenLDAP 2.4.31 OpenSSL 1.0.1b Cyrus-SASL 2.1.25 I am running in the following environment: Dell Poweredge 2950; dual-core Intel(R) Xeon(R) CPU 5110 @ 1.60GHz; 8GB RAM Scientific Linux 5.7 Am I doing something wrong (besides the ACLs for cn=LDAP Admins,ou=Groups,dc=example,dc=com. I'm still struggling there) ? Thank you, Mark