Subject: postfix broken by AF_LOCAL semantics change
To: None <>
From: Perry E.Metzger <>
List: tech-kern
Date: 11/28/2003 23:14:15
Matt made the following change to uipc_usrreq.c:

  revision 1.68
  date: 2003/09/03 21:30:12;  author: matt;  state: Exp;  lines: +18 -6
  Change the behavor of AF_LOCAL connect() to sleep until the server has
  accepted the connection.  This can prevent a client from overwhelming a

Unfortunately, this changed the semantics of our sockets in such a way
that the postfix qmgr, when attempting to connect to a unix domain
socket that no one is accepting on, will block. That makes us
different from every other Unix, apparently, and causes Postfix to
seize up horribly under load.

Can we revert this alteration?