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Slapd restarting slowly

To: <openldap-technical@openldap.org>
Subject: Slapd restarting slowly
From: Joe Tseng <joe_tseng@hotmail.com>
Date: Tue, 1 Mar 2011 09:37:05 -0500
Importance: Normal
I recently set up a file server using Fedora and I configured it to run as a PDC with Samba and OpenLDAP.  It had been running very smoothly until just last night when I discovered when I tried to restart the slapd service it would just sit there for a few minutes.  After it did start I looked in /var/log/messages to see if I could glean some clues; it seems as part of "service slapd start" the system would request information from slapd in order to restart slapd.  Seems pretty circular to me...  I did not note any type of success message when slapd finally did wake up from suspended animation.

I did not set slapd to generate a log file previously but after I put in that parameter in slapd.conf and restarted the service I still didn't get any output.  I did get this from /var/log/messages:

$ sudo tail -f /var/log/messages
Feb 28 21:00:11 server0 slapd: nss_ldap: reconnecting to LDAP server (sleeping 4 seconds)...
Feb 28 21:00:15 server0 slapd: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:00:15 server0 slapd: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:00:15 server0 slapd: nss_ldap: reconnecting to LDAP server (sleeping 8 seconds)...
Feb 28 21:00:23 server0 slapd: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:00:23 server0 slapd: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:00:23 server0 slapd: nss_ldap: reconnecting to LDAP server (sleeping 16 seconds)...
Feb 28 21:00:39 server0 slapd: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:00:39 server0 slapd: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:00:39 server0 slapd: nss_ldap: reconnecting to LDAP server (sleeping 32 seconds)...
Feb 28 21:01:11 server0 slapd: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:01:11 server0 slapd: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:01:11 server0 slapd: nss_ldap: reconnecting to LDAP server (sleeping 64 seconds)...
Feb 28 21:02:15 server0 slapd: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:02:15 server0 slapd: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:02:15 server0 slapd: nss_ldap: could not search LDAP server - Server is unavailable
Feb 28 21:02:15 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:02:15 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:02:15 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:02:15 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:02:15 server0 slapd[5555]: nss_ldap: reconnecting to LDAP server (sleeping 4 seconds)...
Feb 28 21:02:19 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:02:19 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:02:19 server0 slapd[5555]: nss_ldap: reconnecting to LDAP server (sleeping 8 seconds)...
Feb 28 21:02:27 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:02:27 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:02:27 server0 slapd[5555]: nss_ldap: reconnecting to LDAP server (sleeping 16 seconds)...
Feb 28 21:02:43 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:02:43 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:02:43 server0 slapd[5555]: nss_ldap: reconnecting to LDAP server (sleeping 32 seconds)...
Feb 28 21:02:50 server0 smbd_audit: jtseng|10.1.0.106|create_file|fail (Is a directory)|0x20089|pictures
Feb 28 21:02:50 server0 smbd_audit: jtseng|10.1.0.106|create_file|fail (Is a directory)|0x20089|pictures/porsche918
Feb 28 21:03:15 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:03:15 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:03:15 server0 slapd[5555]: nss_ldap: reconnecting to LDAP server (sleeping 64 seconds)...
Feb 28 21:04:19 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://hda.at.home: Can't contact LDAP server
Feb 28 21:04:19 server0 slapd[5555]: nss_ldap: failed to bind to LDAP server ldap://127.0.0.1/: Can't contact LDAP server
Feb 28 21:04:19 server0 slapd[5555]: nss_ldap: could not search LDAP server - Server is unavailable

I stopped the log when slapd was up and running:


$ sudo service slapd restart
Stopping slapd:                                            [  OK  ]
Starting slapd:                                            [  OK  ]
$ sudo service slapd status
slapd (pid  5726) is running...

$ ps -ef | grep slapd
ldap      5726     1  0 21:04 ?        00:00:00 /usr/sbin/slapd -h  ldap:///
-u ldap
jtseng    5756  5501  0 21:05 pts/2    00:00:00 grep slapd


My includes for slapd are as follows:

include         /etc/openldap/schema/corba.schema
include         /etc/openldap/schema/core.schema
include         /etc/openldap/schema/cosine.schema
include         /etc/openldap/schema/duaconf.schema
include         /etc/openldap/schema/dyngroup.schema
include         /etc/openldap/schema/inetorgperson.schema
include         /etc/openldap/schema/java.schema
include         /etc/openldap/schema/misc.schema
include         /etc/openldap/schema/nis.schema
include         /etc/openldap/schema/openldap.schema
include         /etc/openldap/schema/ppolicy.schema
include         /etc/openldap/schema/collective.schema
include         /etc/openldap/schema/samba.schema
include         /etc/openldap/schema/autofs.schema
include         /etc/openldap/schema/ldapns.schema

I imagine I won't need all of those but aside from core, inetorgperson, openldap, samba, autofs and ldapns I wouldn't know what I can discard.  I know including various schemas can add to the boot time but this has not shown itself to be a problem in the recent past.  As far as users are concerned it's just me, the wife, my son and three workstations.

I hope someone can clue me in...  Thanks.

 - Joe
Follow-Ups:
- Re: Slapd restarting slowly
  - From: Dieter Kluenter <dieter@dkluenter.de>
- Re: Slapd restarting slowly
  - From: Buchan Milne <bgmilne@staff.telkomsa.net>
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