This bug has been copied from bug #563362 and has been proposed to be backported to 4.8 z-stream (EUS).
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Under certain circumstances, the nss_ldap module may have caused the application to leak file descriptors. As a result, the number of open sockets could reach the maximum limit of 1024. With this update, this error has been fixed, and file descriptors are no longer leaking.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2010-0538.html