How to get information for determining who queried to nslcd service.

Issue

• The following messages of nslcd service were output when OS is booted up on our customer's system.

nslcd[xxxx]: [aaaaaa] nslcd_passwd_byname(): invalid user name
nslcd[xxxx]: [bbbbbb] nslcd_group_byname(): invalid group name

• Our customer wants to know how to get information(e.g., process id) for determining what process or service queried a name to nslcd service.
• If -d option in /etc/init.d/nslcd is added, nslcd is going to start on foreground, and the boot of OS stops.