This bug has been copied from bug #509866 and has been proposed to be backported to 5.4 z-stream (EUS).
in 2.6.18-164.20.1.el5
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: When data was transmitted from a server process to a client process while the client process was waiting for data provided by the 'select()' function, the client process might not have returned from the 'select()' function. With these update, the client process returns from the 'select()' function.
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-2010-0539.html