slapd still allows bind but returns no data

["Josh M. Hurd" <JoshH@revenuescience.com>]

I have been fighting with this issue for a couple months now and I  
really need a solution.

I have 2 openldap servers recently upgraded to 2.3.38 with a brand  
new rebuilt bdb from an LDIF dump.
The 2 servers sit behind a load balancer (read-only) and provide  
basic authentication for about 300 linux servers.
There's not much traffic on them but those who need access need access.

The problem is they stop returning data, slapd is still running  
otherwise seems ok.
You can still bind to them using rootdn with no issues.
I found an old thread describing a similar problem that suggested an  
upgrade which I did.
I was using 2.2.13 now upgraded to 2.3.38

My level of knowledge of OpenLDAP is probably just above novice so I  
don't have a good base for trouble shooting.

This is causing HUGE disruption and needs to be fixed immediately so  
any and all help is much appreciated.

I turned on debug logging (-s 1) this morning so should have a bit of  
data to share with you if need be.

Thanks,
Josh