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Re: (ITS#4361) bdb autorecovery didn't
Apparently opening an environment with DB_JOINENV isn't safe if the
environment has stale locks.
This kind of ties in with ITS#4362, we may just need to quit using the
We use this option to try to retrieve the flags that were used on the
existing environment. The main reason it's important is because the
environment left by the slaptools "quick" mode isn't recoverable, since
none of the transaction logging options are present there. But BDB
doesn't return an error if you try to recover in this situation, it just
wipes out the old environment. Any data that was in the cache but not
flushed out is just discarded. We try to prevent slapd from running in
this case, since the database is basically useless then, but the only
way to detect it is with the DB_JOINENV option.
> Full_Name: Aaron Richton
> Version: 2.3.18
> OS: Solaris 9
> Submission from: (NULL) (18.104.22.168)
> Following ITS#4360's kill -9, autorecovery didn't.
> current (and only) thread: t@1
>  ___lwp_mutex_lock(0xff050000, 0x0, 0x0, 0x0, 0x0, 0x0), at 0xfed1f950
> => __db_pthread_mutex_lock(dbenv = 0x38d620, mutexp = 0xff050000), line 220
> in "mut_pthread.c"
>  __db_e_attach(dbenv = 0x38d620, init_flagsp = 0xffbff294), line 290 in
>  __dbenv_open(dbenv = 0x38d620, db_home = 0x2ff260
> "/var/openldap-data/rci", flags = 262208U, mode = 384), line 207 in
>  bdb_db_open(be = 0x2f5e40), line 227 in "init.c"
>  backend_startup_one(be = 0x2f5e40), line 212 in "backend.c"
>  backend_startup(be = 0x2f5e40), line 301 in "backend.c"
>  slap_startup(be = (nil)), line 250 in "init.c"
>  main(argc = 6, argv = 0xffbffbbc), line 791 in "main.c"
> truss shows:
> lwp_mutex_lock(0xFF050000) (sleeping...)
> this has been at least 10 minutes, I can't imagine it's going anywhere.
> -d -1, unsurprisingly:
> bdb_db_open: dc=rci,dc=rutgers,dc=edu
> bdb_db_open: unclean shutdown detected; attempting recovery.
> bdb_db_open: dbenv_open(/var/openldap-data/rci)
> killed off slapd again, db_recover DID work:
> # /usr/local/db4/bin/db_recover -v
> db_recover: Finding last valid log LSN: file: 2 offset 68073756
> db_recover: Recovery starting from 
> db_recover: Recovery complete at Sat Jan 21 19:00:40 2006
> db_recover: Maximum transaction ID 800075f1 Recovery checkpoint 
> [...and then...]
> bdb_db_open: Recovery needed but environment is missing - assuming recovery was
> done manually...
> Well, at least that part works...
-- Howard Chu
Chief Architect, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc
OpenLDAP Core Team http://www.openldap.org/project/