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Re: slapd hangs doing large ldap (add|modify|delete)
--On Monday, August 08, 2005 6:35 PM +0530 Thaths <thaths@gmail.com> wrote:
Hi,
I would really like to deploy OpenLDAP throughout my 700-user network.
However, slapd stops working from time to time randomly. When I run
slapcat nothing happens and the command hangs. This is really
frustrating me.
Have you done any logging?
I have OpenLDAP v 2.2.23-8 installed from Debian package for
sarge/stable. The "crash" usually happens when I am doing a ldapdelete
or ldapadd or ldapmodify. It is totally unpredictable. Not knowing how
to recover from these crashes, I have been re-installing slapd from
scratch and recreating my users.
1. Why does these hangs happen?
Have you configured slapd properly?
Have you configured BDB properly?
2. How can I avoid them?
Have you turned up logging?
3. Can I recover from such a hang when it happens? How?
db_recover, usually.
I tried db_recover and it didn't solve the crash/hang. Here is the output:
jupiter:~# db_recover -c -v -h /var/lib/ldap
db_recover: Ignoring log file: /var/lib/ldap/log.0000000004:
unsupported log version 8
This indicates you are using the wrong version of db_recover. Note that
sarge installs multiple versions of BDB, and that OpenLDAP in sarge uses
BDB 4.2.52 + patches (and not BDB 4.3 which is the default db_recover)
command.
If this is the stability level of OpenLDAP, I really hesitate to use
it in a production environment.
OpenLDAP + BDB is rock stable for me, so I'm inclined to believe you have
other issues. Although I will note that OpenLDAP 2.2.23 is several
releases behind (2.2.26 is stable, 2.2.27 is the current 2.2 release).
--Quanah
--
Quanah Gibson-Mount
Principal Software Developer
ITSS/Shared Services
Stanford University
GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html
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