In mds/openldap/ldapmodules/search.c with tag globus_2_4_3 I see the following
on lines 422-427 (indentation reduced for clarity):

-----------------------------------------------------------------------------
                errno = 0;
                while (errno == EINTR)
                        rc = select (fdn + 1, &readfds, NULL, &readfds, &tv);


                if (rc < errno) 
-----------------------------------------------------------------------------

Surely this code does not do what was intended (the select() is never done);
also the comparison of "rc" with "errno" is bad style at the very least.

I propose this to be fixed by applying the first patch attached below.
Note that it also ensures the variable "data1" is always initialized.
A similar patch was applied by LCG on top of MDS 2.2 and found to work OK.

I have added two more patches by NorduGrid/LCG, that fix various
OpenLDAP bugs and misfeatures affecting the stability of the MDS.