Op 28-2-2011 3:00, Howard Chu schreef:
Ruud Baart wrote:
Problem: For a customer we use LDAP for many years. Last year suddenly the slapd service just stopped without any traces in the logfiles. After a restart of slapd everything works fine again. But the problem was there: it was not an incident, now and then slapd just stops and always without any traces in the logfiles. Sometime three times a day, sometime a week without a failure. I can't find a pattern or any relation to any other service on the linux server.
Attach to the running slapd with gdb, type handle all nostop continue and let it run. If there's a crash you'll see what happened in gdb.
I tried it but I don't get this working. I have no experience with gdb. I assume I do something wrong.
Normally slapd daemon runs like this on a test machine /usr/sbin/slapd -h ldap:/// ldapi:/// -g openldap -u openldap -f /etc/ldap/slapd.conf -l local5
If I try this running attached to gdb: su openldap -s /bin/bash gdb --args /usr/sbin/slapd -h ldap:/// ldapi:/// -g openldap -u openldap -f /etc/ldap/slapd.conf -l local5 GNU gdb (GDB) 7.0.1-debian .... This GDB was configured as "i486-linux-gnu". .. Reading symbols from /usr/sbin/slapd...(no debugging symbols found)...done. (gdb) handle all nostop Signal Stop Print Pass to program Description SIGHUP No Yes Yes Hangup SIGQUIT No Yes Yes Quit ... EXC_EMULATION No Yes Yes Emulation instruction EXC_SOFTWARE No Yes Yes Software generated exception EXC_BREAKPOINT No Yes Yes Breakpoint (gdb) (gdb) continue The program is not being run. (gdb) run Starting program: /usr/sbin/slapd -h ldap:/// ldapi:/// -g openldap -u openldap -f /etc/ldap/slapd.conf -l local5 [Thread debugging using libthread_db enabled]
Program exited with code 01.
At this point I have no idea what to do.