No connection! Some Ideas

That night, I had a problem with stopping the LDAP, the only thing I have in the log is this:

connection_read(42): no connection!

my version OpenLDAP is: @(#) $OpenLDAP: slapd 2.4.11 (Jul 24 2010 08:14:20) $#012#011@murphy:/build/buildd-openldap_2.4.11-1+lenny2-i386-H5BDjb/open ldap-2.4.11/debian/build/servers/slapd

Debian Lenny 5.

after the restart ldap I have the following message:

connection_input: conn=32 deferring operation: pending operations

I honestly do not know what happens, I have this problem and sometimes for my system for some reason not yet know what it is, and debugging of slapd.conf is 256 and as I passed the e-mail that is the only information I have. Can anyone help me? Thanks