Q:

Error while starting slapd

In my CentOS 6.5 machine I just made a new import with the slapadd command to load a new LDIF (from another server). 
The dc  values are exactly the same and it was working with a previous load. Between two loads I clean the database with rm -f /var/lib/ldap/*
But now when I try to start the slapd service with service slapd start I get this error:
Starting slapd:         [FAILED]

I checked if there is an error log somewhere but cannot find it: 

Nothing lokking like *ldap* or *slapd* in /var/log folder
The log.000000xxx files in /var/lib/ldap are looking binaries

Is there any way to find what is the cause why slapd does not start properly?

A:

If you removed everything from /var/lib/ldap/, you'll be missing the DB_CONFIG file, I guess, which is required so slapd (and tools) to know with which settings to setup the bdb/hdb databases.
Try running slapd with debugging enabled to further investigate what is causing slapd to refuse starting:
# slapd -u ldap -g ldap -d 255

This will enable very verbose debug logging to stderr (you'll have to adjust the user- and groupname appropriately, of course).

