Re: syncrepl_del_nonpresent leading to directory implosion

[Howard Chu <hyc@symas.com>]

Aaron Bennett wrote:
> Hi,
>
> I’ve got a two-node MMR setup using syncrepl running 2.4.36 with back-bdb.
>
> Last night, between 1/3 and 1/2 of the entries in our directory disappeared.
> Fortunately I have olcLogLeve=sync set, so I think I have a line on what happened…
>
> I see this at 4AM long of the morning before the fun started:
>
> Jul  7 04:19:30 zoot slapd[15011]: bdb(dc=clarku,dc=edu): Lock table is out of
> available lock entries
>
> Jul  7 04:19:30 zoot slapd[15011]: => bdb_idl_insert_key: c_get failed: Cannot
> allocate memory (12)

> What happened?  Did I get hit by an oddball BDB/Syncrepl behavior?  Do I have
> a bad misconfiguration in my replication setup?

You have a bad misconfig in your BDB, you need to configure a larger lock table.

and the syncrepl code probably needs to be fixed to quit if the backend 
returns an LDAP_OTHER error code like this. Please submit an ITS for this.

> Thanks for your time,
>
> Aaron
>
> ----
>
> Manager of Systems Administration
>
> Clark University ITS


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