config as follow :

Server 1 :

syncrepl  rid=001
              provider=ldap://host1:389/
              bindmethod=simple
              binddn="cn=Manager"
              credentials=secret
              searchbase="o=ABC"
              schemachecking=off
              type=refreshAndPersist
              attrs="*,+"
              retry="1 +"

syncrepl      rid=002
              provider=ldap://host2:389/
              bindmethod=simple
              binddn="cn=Manager"
              credentials=secret
              searchbase="o=ABC"
              schemachecking=off
              type=refreshAndPersist
              attrs="*,+"
              retry="1 +"

syncrepl      rid=003
        &nb sp;     provider=ldap://host3:389/
              bindmethod=simple
              binddn="cn=Manager"
              credentials=secret
              searchbase="o=ABC"
              schemachecking=off
              type=refreshAndPersist
              attrs="*,+"
              retry="1 +"

syncrepl      rid=004
              provider=ldap://host4:389/
              bindmethod=simple
              binddn="cn=Manager"
              credentials=secret
              searchbase="o=ABC"
              schemachecking=off
              type=refreshAndPersist
              attrs="*,+"
              retry="1 +"


mirrormode on
serverID   001

# Performance tuning directives
sizelimit       5000
threads         8
idletimeout      14400
cachesize       10000
checkpoint      256     15

for server 2, server 3, server 4, config are the same as server 1, except the serverID is different (serverID 002, serverID 003, serverID 004 respectively).

My question is, for each server, the config for syncrepl should exclude itself ?

i.e.  for server 1, no need to include these lines ?? similar for server 2, 3, 4 ???

syncrepl  rid=001
              provider=ldap://host1:389/
              bindmethod=simple
              binddn="cn=Manager"
              credentials=secret
              searchbase="o=ABC"
              schemachecking=off
              type=refreshAndPersist
              attrs="*,+"
              retry="1 +"

Thanks

> Date: Tue, 11 Nov 2008 12:16:39 +0100
> From: ando@sys-net.it
> To: badguy9588@hotmail.com
> CC: openldap-technical@openldap.org
> Subject: Re:
>
> Bad Guy wrote:
> > Dear all,
> >
> > I am running the openldap 2.4.11 with 4 way masters (SID=001 to 004) configured. (my suffix is empty in slapd.conf)
> >
> > The data can be synced initially. I add records in 1 server and all the other 3 servers will have the new record added. However, I found that after running for some time, one server will have corrupted contextCSN in SID=001.
> >
> > dn:
> > contextCSN:: sCttCIio0wAxNTQzMTMuMDQ1Mjk3WiMwMDAwMDAjMDAyIzAwMDAwMA==
> > contextCSN: 20081107061013.853051Z#000000#001#000000
> > contextCSN: 20081107073602.911356Z#000000#003#000000
> > contextCSN: 20081107061028.825773Z#000000#004#000000
> >
> > The contextCSN for SID=002 in server 1 is corrupted. So, whenever there is an update in SID=002 server, the SID=001 server will never get the update,
> > however, when there is update in SID=003 or SID=004 server, the records will get updated in SID=001.
> >
> > We have a background cron job in each server running at 1 minutes interval to retrieve the records and set some user defined attributes if it meet some certain criteria.
> >
> > What's the cause to this corruption ? Is there any way to recover the corrupted contextCSN by command or script without rebuild the data ?
>
> Looks similar to <http://www.openldap.org/its?findid=5661>. Can you
> post your configuration? Also, can you try re24 code from the CVS (or
> wait until 2.4.13 is out)?
>
> p.
>
>
> Ing. Pierangelo Masarati
> OpenLDAP Core Team
>
> SysNet s.r.l.
> via Dossi, 8 - 27100 Pavia - ITALIA
> http ://www.sys-net.it
> -----------------------------------
> Office: +39 02 23998309
> Mobile: +39 333 4963172
> Fax: +39 0382 476497
> Email: ando@sys-net.it
> -----------------------------------
>

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