Ok, thanks. 

On Fri, Jul 19, 2019 at 11:55 AM Howard Chu <hyc@symas.com> wrote:
Alex Hebra wrote:
> # gdb /usr/local/libexec/slapd 
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for details.
> This GDB was configured as "amd64-marcel-freebsd"...(no debugging symbols found)...
> (gdb) run -h ldaps:// <> ldap:// <> ldaps:// <> -u ldap -g ldap
> Starting program: /usr/local/libexec/slapd -h ldaps:// <> ldap:// <> ldaps://
> <> -u ldap -g ldap
> (no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...usage: /usr/local/libexec/slapd options

> Program exited with code 01.
> Current language:  auto; currently minimal
> Am I missing something?

Apparently. Re-read the slapd(8) manpage for proper option syntax.

Also, if you had actually done what I said - attach to an already running slapd - you
wouldn't have had this problem. Following instructions is a pretty fundamental skill.

If you want to start under gdb you're also going to need a debug flag, otherwise it
will just fork/exit out from under you.
> Thanks.
> On Thu, Jul 18, 2019 at 7:44 PM Howard Chu <hyc@symas.com <mailto:hyc@symas.com>> wrote:
>     Alex Hebra wrote:
>     > Hi there,
>     >
>     > I've MMR running on two FreeBSD servers with OpenLDAP 2.4.47. After few days one node always crash with signal 11.
>     >
>     > The last log I got from slapd is:
>     >
>     > Jul 17 18:04:19  slapd[676]: syncprov_matchops: skipping original sid 001
>     >
>     > When I try to restart the slapd process it eats all the ram memory, until the server become irresponsible. I have to delete the database and re-sync
>     everything
>     > to make it works again.
>     >
>     > Is there a way to find out how can I fix this issue?
>     Attach to the running slapd with gdb and let it run, then examine the stack trace when it
>     gets the SIGSEGV,

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