NethServer 6

A temporary power loss left a BDB log file corrupted. The db_recover command fixes it, but a problem on restarting slapd persists.

• warning make a backup of your BDB files

•   cd /var/lib/ldap
    mkdir backup
    cp __db.00* log.* backup/
    for F in __db.* log.*; do dd if=/dev/urandom of=$F count=10; done
    ldapsearch -Y EXTERNAL uid=admin
  

• BOOM
• In /var/log/messages:

  Oct 24 17:04:28 localhost kernel: slapd[15093] general protection ip:7f9f94c525c8 sp:7f9f90f7c310 error:0 in libdb-4.7.so[7f9f94c29000+16f000]
  ldap_result: Can't contact LDAP server (-1)
  [root@davidep2 ldap]# Oct 24 17:04:28 localhost init: slapd main process (15087) killed by SEGV signal
  Oct 24 17:04:28 localhost init: slapd main process ended, respawning
  Oct 24 17:04:28 localhost nslcd[15099]: caught signal SIGTERM (15), shutting down
  Oct 24 17:04:28 localhost nslcd[15099]: version 0.7.5 bailing out
  Oct 24 17:04:28 localhost init: nslcd main process (15099) terminated with status 1
  Oct 24 17:04:29 localhost init: slapd main process (15116) terminated with status 1
  Oct 24 17:04:29 localhost init: slapd main process ended, respawning
  

• On root's console:

  [root@davidep2 ldap]# ps axf
  [...]
  15117 ?        Ss     0:00 /bin/sh -e /dev/fd/10
  15122 ?        S      0:00  \_ sleep 3
  [root@davidep2 ldap]# ldapsearch -Y EXTERNAL uid=admin
  ldap_sasl_interactive_bind_s: Can't contact LDAP server (-1)
  [root@davidep2 ldap]# status slapd
  slapd respawn/post-start, (post-start) process 15117
  

The slapd upstart task is blocked in respawn/post-start state. It persists into an infinite loop of ldapwhoami commands. See slapd.conf, line 51.