Re: (ITS#5661) contextCSN gets corrupted on the stand by mirror

[ghenry@OpenLDAP.org]

----- "ali pouya" <ali.pouya@free.fr> wrote:

> Hi Gavin;
> 
> Below you find the answers to your questions :
> 
> > Can we get your bdb version, your config and the logs of an empty
> mirrormode
> > node B pulling in the data loaded in mirrormode A (posted/hosted
> online
> > somewhere).
> 
> The BDB version is 4.6.21.
> You find here attached the file conf.tar.gz containing the
> configuration of B.

Thanks.

> The file syncrepl.conf.simple works well, but the file
> syncrepl.conf.double
> garbles the contextCSN (I write more than 1000 entries per minute).
> Do you want a log for the 10 million entries ? Which loglevel ?

Nope, not yet. loglevel sync

> The problem only happens if there are write operations on A, not if
> the server A
> is stationary.

Also note that serverID is a *global* directive not per database. Move 
that out of "database bdb".

> > Also, has this always happened on the same machine? What are the
> specs of the
> > servers?
> 
> The problem happens on the stand by server : If I write on B the
> contextCSN of
> A gets corrupted (I have already tested this).
> 
> My servers are quadri-processor Xeon 2.2 GHz.
> I think this is not related to the hardware but the "year" part of
> contextCSN is
> not well protected against concurrent operations (?).
> 
> >
> > Is this a fresh install?
> Yes for 2.4.11, but I use OpenLdap since 5 years for my different
> projects.

OK, well you should then know that 
"rootdn		cn=admin,ou=ressources-dgi,ou=mefi,o=gouv,c=fr"

by passes all ACLs, so you don't need:

access to *
    by dn.base="cn=admin,ou=ressources-dgi,ou=mefi,o=gouv,c=fr" write

-- 
Kind Regards,

Gavin Henry.

T +44 (0) 1224 279484
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E ghenry@suretecsystems.com

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