If your LDAP DB got corrupted or showing unclear shutdown, then you can recover it manually by re indexing the database.
Recover Corrupted LDAP Database
Stop Ldpa service first
Take the database backup
LDAP Database Recovery Method
1. DB Recovery Method
Identify the path of ldap data base.
Run the following command. This will recover the LDAP Database.
Now Start the ldap service
2. Re indexing Method
If the above method was not recovering the ldap db, then try to re index the database.