connection_read: no connection!

[Thierry Lacoste <lacoste@miage.univ-paris12.fr>]

I'm using OpenLDAP 2.3.24 on FreeBSD 6.1.
I'm using slurpd between one master and one slave.

I'm having these messages on the slave:

Jul 19 21:20:37 pollux slapd[13533]: conn=792 op=2 UNBIND
Jul 19 21:20:37 pollux slapd[13533]: conn=792 fd=18 closed
Jul 19 21:20:37 pollux slapd[13533]: connection_read(18): no connection!

Jul 20 01:15:37 pollux slapd[17928]: conn=182 op=2 UNBIND
Jul 20 01:15:37 pollux slapd[17928]: conn=182 fd=11 closed
Jul 20 01:15:37 pollux slapd[17928]: connection_read(11): no connection!

ul 21 15:47:17 pollux slapd[33013]: conn=1090 op=2 UNBIND
Jul 21 15:47:17 pollux slapd[33013]: conn=1090 fd=23 closed
Jul 21 15:47:17 pollux slapd[33013]: connection_read(23): no connection!

This seems to never happen on the master.

I found some infos on mailing lists archives about poorly written
clients not unbinding before closing connexion but apparently
this is not the case here.
I also found a message of Quanah telling this is a harmless error
but I'd like to understand what's happening and why only on the slave.

Best regards,
Thierry.