Re: RE : (ITS#6720) back-ldap core dump

[masarati@aero.polimi.it]

olivier.chirossel@sfr.com wrote:

> Thank's for you reply,
> 
> you can get a tar file containing a simple case which reproduce the problem=
>  here ( i don't put rewriting rules in proxy conf, just strip of  operation=
> nal  attribut )
> 
> wget http://olivier:its6720@84.103.237.12/its6720.tar
> 
> 
> the lance.sh inititialise the tests=20
> (the slapd suppose to be in /usr/local/libexec)
> 
> and you reproduce it with the command :
> 
> ldapmodify -D "cn=3Dmanager,dc=3Dneuf,dc=3Dfr" -H "ldap://127.0.0.1:489";  -=
> w secret -f mod
> 
> i try to explain you my need=20
> 
> 1) For the moment i have a master in 2.3.x with many replica in 2.3.x with =
> slurpd replication
> 
> 2) my goal is to migrate to a mirror mode master infrastructure with syncre=
> pl replication
> 
> 3) the first step is to install my mirror mode infrastructure and replicate=
>  with slurpd from my old master.
> 
> 4) second step re install replica one by one with syncrepl replication to m=
> y new mirror mode infrastructure
> 
> 5) third step write directly to my mirror mode infrastructure
> 
> For the first step i put a proxy ldap between my old master and my mirror m=
> ode infrastructure to do rewrite rules and strip operationnal attribut (i n=
> eed, at the end,  have a new clean infrastructure with entryCSN contains th=
> e ServerId of my new master, for checks the replcation status between my ma=
> ster and between my replica and my mirror mode architcture)
> =20
> The ldapmodify command reproduce the replication operations which highlight=
>   the problem..
> 
> PS:=A0before strip attribute with rwm-map directives i try to put "lastmod =
> off" in proxy ldap configuration without success ...

Thanks for the report.  I've reproduced the bug; it appears to be inside 
slapo-rwm(5).  The core dump is related to a double free, which I'm 
trying to track.

In any case, since as far as I understand the only reason you need 
slapo-rwm(5) is to modify data during the migration, you should probably 
do it offline, after exporting your data and before importing in the new 
system.

p.