Locker killed to resolve a deadlock

Brian Murray brian at ubuntu.com
Thu May 16 22:56:22 UTC 2013


On Wed, May 15, 2013 at 04:40:16PM -0500, Francois Gnu wrote:
> Hi masters,
> Since yesterday, i have that error in my log  /var/log/syslog:
> 
> 
> slapd[861]: => bdb_idl_insert_key: c_put id failed: DB_LOCK_DEADLOCK:
> Locker killed to resolve a deadlock (-30994)
> slapd[861]: conn=-1 op=0: attribute "objectClass" index add failure
> slapd[861]: => bdb_idl_insert_key: c_put id failed: DB_LOCK_DEADLOCK:
> Locker killed to resolve a deadlock (-30994)
> slapd[861]: conn=-1 op=0: attribute "objectClass" index add failure
> slapd[861]: => bdb_idl_insert_key: c_put id failed: DB_LOCK_DEADLOCK:
> Locker killed to resolve a deadlock (-30994)
> slapd[861]: conn=-1 op=0: attribute "entryCSN" index add failure
> slapd[861]: <= bdb_equality_candidates: (mail) not indexed
> slapd[861]: <= bdb_equality_candidates: (mail) not indexed
> slapd[861]: => bdb_idl_insert_key: c_get failed: DB_LOCK_DEADLOCK: Locker
> killed to resolve a deadlock (-30994)
> slapd[861]: conn=-1 op=0: attribute "entryCSN" index add failure
> slapd[861]: => bdb_idl_insert_key: c_put id failed: DB_LOCK_DEADLOCK:
> Locker killed to resolve a deadlock (-30994)
> slapd[861]: conn=-1 op=0: attribute "entryCSN" index add failure
> slapd[861]: => bdb_idl_delete_key: c_del id failed: DB_LOCK_DEADLOCK:
> Locker killed to resolve a deadlock (-30994)
> slapd[861]: conn=-1 op=0: attribute "entryCSN" index delete failure
> slapd[861]: => bdb_idl_delete_key: c_del id failed: DB_LOCK_DEADLOCK:
> Locker killed to resolve a deadlock (-30994)
> slapd[861]: conn=-1 op=0: attribute "entryCSN" index delete failure
> slapd[861]: => bdb_idl_insert_key: c_get failed: DB_LOCK_DEADLOCK: Locker
> killed to resolve a deadlock (-30994)
> slapd[861]: conn=-1 op=0: attribute "entryUUID" index add failure
> 
> That, causes the size of logs increases very quickly, 10Mo every minute.
> 
> I used slapindex, but the problem persists.
> 
> I use ubuntu 12.04 with slapd 2.4.28.
> I have 15 ldap servers (MMR) and its affects all the 15 servers.
> All servers are virtualized in KVM.
> 
> I attached the provider config that is connected at all the consumers.
> The consumers are cut in 3 groups of 5 servers.
> 
> Provider: 1,5Go Ram | 2Go swap | olcDbConfig: set_cachesize 0 734003200 0
> Consumers: 512Mo | 2Go swap | olcDbConfig: set_cachesize 0 209715200 0

I don't see any existing bug reports with these error message in the log
files.  You might check with the Ubuntu server team in #ubuntu-server on
freenode.

--
Brian Murray
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