Re: mdb broken under OpenBSD

[Howard Chu <hyc@symas.com>]

Paul B. Henson wrote:
> I was interested in using openldap under OpenBSD; they currently have
> mdb disabled as they say it is broken. That OS lacks a unified buffer
> cache, so mdb can only be used with the MDB_WRITEMAP option enabled, but
> supposedly theoretically it should work with that. I tried running the
> mdb tests, and it immediately segfaults:
>
> Program terminated with signal 11, Segmentation fault.
>
> 2773            flags |= env->me_flags & MDB_WRITEMAP;
>
> It looks like mdb_txn_begin is being passed a NULL env? I haven't started
> poking around yet to see why that might be, but I thought I'd just toss this
> out there in case an expert had a thought before I spent a lot of time on
> it :). Thanks...

OpenBSD's lack of a unified buffer cache is a pretty glaring deficiency, yes. 
Have to say, since getting nowhere discussing that feature with them, I 
personally have written off supporting it.

For the trace you're showing, you'll have to debug the slapadd invocation and 
find out why env is NULL. Also use current (2.4.45) source, at least.

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