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slapd hangs up and uses 100% CPU (v2.1.12 release)
Greetings,
We have a problem with slapd hanging up and using 100% CPU time on our
machine when we try to do operations on a tree, it happens in random
places but we could find one where it happens every time, when we try to
delete a certain object in the tree. We can repro the problem as many
times as we wish. Unfortunately the slapd has to be killed by kill -9 and
this corrupts our databases, so we have to reload a directory (PITA).
Thus two questions: Why is this stuff happening ? and is there a way to
run a consistency check on BDB databases, thus not requiering the full
reload ?
Here are release infos, configs and debug output:
Releases:
-----------------------------------------
Openldap v2.1.12 release
Bdb libraries 4.1.24
Solaris 9 Sparc with latest patch cluster
HW:
-----------------------------------------
Sun Netra T1125 with 1 Gig RAM.
DB_CONFIG
-------------------------------
set_lg_bsize 2097152
set_cachesize 0 209715200 2
slapd.conf:
--------------------------------------------------------------
include /etc/openldap/schema/core.schema
include /etc/openldap/schema/cosine.schema
include /etc/openldap/schema/nis.schema
include /etc/openldap/schema/qmail.schema
include /etc/openldap/schema/inetorgperson.schema
include /etc/openldap/schema/qmailControl.schema
pidfile /var/run/slapd.pid
argsfile /var/run/slapd.args
disallow bind_anon
allow bind_v2
database bdb
suffix "o=Codeangels, c=CH"
directory /export/ldap-databases/codeangels
rootdn ** censored **
rootpw ** censored **
index cn,sn,uid pres,eq,approx,sub
index objectClass eq
... snip ....
Debug:
---------------- snip -------------------
=> access_allowed: write access granted by write(=wrscx)
====> bdb_unlocked_cache_return_entry_r( 526 ): returned (0)
bdb_dn2entry_rw("cn=managers,ou=codeangels.com,ou=mail,ou=itaccounts,o=codeangels,c=ch")
=> bdb_dn2id_matched(
"cn=managers,ou=codeangels.com,ou=mail,ou=itaccounts,o=codeangels,c=ch" )
====>
bdb_cache_find_entry_dn2id("cn=managers,ou=codeangels.com,ou=mail,ou=itaccounts,o=codeangels,c=ch"):
542 (1 tries)
bdb_cache_entry_db_lock: entry
cn=managers,ou=codeangels.com,ou=mail,ou=itaccounts,o=codeangels,c=ch, rw
1, rc -30995 ====> bdb_cache_find_entry_id( 542 ): 542 (busy) 2
locker = -2147483031
bdb_cache_entry_db_lock: entry
cn=managers,ou=codeangels.com,ou=mail,ou=itaccounts,o=codeangels,c=ch, rw
1, rc -30995 ====> bdb_cache_find_entry_id( 542 ): 542 (busy) 2
locker = -2147483031
bdb_cache_entry_db_lock: entry
cn=managers,ou=codeangels.com,ou=mail,ou=itaccounts,o=codeangels,c=ch, rw
1, rc -30995 ====> bdb_cache_find_entry_id( 542 ): 542 (busy) 2
locker = -2147483031
.... repeat above 2 lines until killed ....
---------------- snip -------------------
---
Kirill Ponazdyr
Technical Director
Codeangels Solutions
Tel: +41 (0)43 844 90 10
Fax: +41 (0)43 844 90 12