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openldap 2.4.43 keeps crashing

hello all,

I upgraded to OpenLDAP 2.4.43 three weeks ago. It runs on debian squeeze 64bits lts
it is built from sources with the fix from ITS#8330

Since the upgrade, it keeps crashing regularly (I would say once every 2 to 5 days)
However, there isn't anything in the logs: no message, no error, no nothing

slapd no longer runs, I restart it, and it runs ok until the next crash

now I don't know how to debug that.
I could downgrade to the previous version (2.4.41) which worked fine, but as our university is closed until 01/11, this is the perfect time to investigate. I still don't know if it's a bug in 2.4.43 or a misconfiguration for which previous versions was forgiving

What are your advice to track down the cause for the crash?

PS: here is a bit of context:
one master with 2 mdb databases: one accesslog, one for the data
two slaves (I mean complete replication, even cn=config)
the master has crashed only once
the slaves keep crashing regularly
the slaves are complete replicas of the master, and I wonder if it could be a source of problems: I'll give details in another thread

*Jephté CLAIN | Développeur, Intégrateur d'applications*
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