Comment 2 for bug 602540

Could you try doing

   strace -f -o/tmp/strace.out ldapadduser <user> <group>

and see where it it hangs? Assuming it is the server and not the client
which hangs, then you'll probably want to do

    p=`pidof slapd`
    strace -f -o/tmp/strace2.out -p $p

and leave that running while you do the ldapadduser command in another
terminal. (Please make sure there is no sensitive information before
posting that, but I assume this is all test data?)