Error after upgrade test

[Henrique de Moraes Holschuh]

On Fri, 20 Jan 2012, Bron Gondwana wrote:
> On Fri, Jan 20, 2012 at 11:59:38AM -0500, Rosenbaum, Larry M. wrote:
> > We are testing the migration of Cyrus-IMAP from v2.3.15 on Solaris 9
> > to v2.4.12 on RHEL6.  After copying the data over to the new server
> > and starting cyrus-imapd, I see the following errors in the log
> > file:
> > 
> > Jan 20 11:51:33 email-new master[7835]: setrlimit: Unable to set
> > file descriptors limit to -1: Operation not permitted Jan 20
> > 11:51:33 email-new master[7835]: retrying with 1024 (current max)
> 
> We get this too.  I really think we should remove the setrlimit from
> Cyrus, since that call doesn't work.  Really, 1024 should be heaps -
> we have removed everything which needs multiple FDs of the same
> filetype now.

Even for master?  Doesn't it need new fds for each child?

It would make sense to leave it alone unless a config option was set
with the desired number of max_fds, though.

The fact is that RLIM_INFINITY does not work for RLIMIT_NOFILE in Linux.
You have two upper limits: the hard limit, and the max number of open files
per process (which can be raised at runtime), and setrlimit will EINVAL if
you breach either limit.

I am not sure if Solaris acts the same, but I would not be too surprised if
the behaviour of the two kernels is similar.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh