Nedavno smo na helpdesku rješavali dva slična problema. Slapd je radio uredno, a db_recover nije prolazio. Evo primjera:

# db(4.2)_recover -h /var/lib/ldap/
db_recover: DB_ENV->log_flush: LSN of 3/5383287 past current end-of-log of 3/5290658
db_recover: Database environment corrupt; the wrong log files may have been removed or incompatible database files imported from another environment
db_recover: id2entry.bdb: unable to flush page: 0
db_recover: txn_checkpoint: failed to flush the buffer cache Invalid argument
db_recover: PANIC: Invalid argument
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: PANIC: fatal region error detected; run recovery
db_recover: DB_ENV->open: DB_RUNRECOVERY: Fatal error, run database recovery

Pokušali smo -c, ali nije pomoglo.

U oba slučaja je slapcat uredno "dumpao" LDAP bazu u tekstualnu datoteku.

Problem je na kraju riješen ovako:

# pkill -9 slapd
# tar cfvz /tmp/var-lib-ldap.tar.gz /var/lib/ldap

Time smo napravili backup, za svaki slučaj.

# slapcat -l /var/backups/slapcat.openldap-cn
# rm /var/lib/ldap/*
# /etc/init.d/slapd start

To kreira praznu ldap bazu unutar direktorija /var/lib/ldap.

Zatim se naredbom slapadd u bazu vrate stari podaci:

# /etc/init.d/slapd stop
# slapadd -l /var/backups/slapcat.openldap-cn
# /etc/init.d/slapd start

Nakon toga slapd radi, a db(4.2)_recover uredno prolazi.