On 06.07.2018, at 16:25 , Howard Chu <hyc@symas.com> wrote:

BÖSCH Christian wrote:
On 06.07.2018, at 15:35 , Howard Chu <hyc@symas.com> wrote:

BÖSCH Christian wrote:
I have 2 nodes in multimaster setup.
Node1 doesn’t startup anymore and crashes.
In debug mode the last lines are:
5b3f6b78 <= index_entry_del( 1121725, "uid=jst9897,ou=ais2ldap,o=abc.at <http://abc.at>" ) success
./../../../libraries/liblmdb/mdb.c:5276: Assertion 'NUMKEYS(mp) > 1' failed in mdb_page_search_root()
What does that mean, and what to do to get online again and have the DB in sync with Node2?

Sounds like the DB is corrupted. What happened on the system prior to your attempt to restart slapd?
There was a script running which deleted all child entries in a subtree (~3000 entries). During that slapd crashed.
I rebooted the server, but slapd doesn’t startup again.

What version of OpenLDAP?


It may be possible to resume from the previous snapshot of the DB, but most likely you'll be better of reloading a slapcat from the other master.
Can I delete the files data.mdb and lock.mdb in the db directory, do a slapcat on node2 and with that output file a slapadd on node1?
Would this be the recommended approach?


 -- Howard Chu
 CTO, Symas Corp.           http://www.symas.com
 Director, Highland Sun     http://highlandsun.com/hyc/
 Chief Architect, OpenLDAP  http://www.openldap.org/project/