(ITS#6368) Bug in deleting entry in MirrorMode

[pitpalme+openldap@gmail.com]

Full_Name: Peter Palmreuther
Version: 2.4.19
OS: FreeBSD 7.2 / Solaris 8
URL: 
Submission from: (NULL) (87.123.91.4)


I've set up OpenLDAP to run in "MirrorMode":

# [...]
overlay syncprov
syncprov-checkpoint     100 10
syncprov-sessionlog     100
# [...]
syncrepl        rid=001
                provider=ldap://localhost:11389
                type=refreshAndPersist
                searchbase="o=esolution,dc=deutscherv,dc=de"
                schemachecking=on
                bindmethod=simple
                binddn="cn=MirrorMode,o=esolution,dc=deutscherv,dc=de"
                credentials="M1rr0rM3"
                retry="60 +"

serverID        1
mirrormode      on
# [...]

The second server is set up identically, except "serverID" is 2 and "provider"
is set to URL of first server. The fact addresses are "localhost" is because I
replicated my main setup on my private server (FreeBSD) to better inspect and
debug the problem.

When adding, modifying and deleting an entry it can happend I do get a positive
return from delete, but a subsequent "add" fails with "code=68: Already
exists".

This does not happen all the time, but often enough to name it "reproducible".

This seems not to happen if there's a "sleep" between modify and delete. It also
seems not to happen if secondary server is down.