Too many open files

Alain Spineux aspineux at
Sat Aug 25 18:44:13 EDT 2007

Maybe this is because your are accessing multiple mailbox through the same
and unique connection.
At each mailbox it should open some files related to the mailbox and never
close them !
The use is to connect to a unique mailbox and read mails and browse
subfolders, and then always use the same related files.

As a workaround you could try to logout and login before to switch mailbox.


On 8/25/07, Dale Ghent <daleg at> wrote:
> On Aug 24, 2007, at 11:49 AM, Rob McMahon wrote:
> > Cyrus-2.2.13 (yes, I know it's getting on a bit).  Solaris 10 SPARC,
> > around 115,000 mailboxes.
> >
> > After deleting just a few, I start getting errors like "Must login
> > first", "System I/O Error" (sorry, I haven't got the exact messages to
> > cut & paste).  Looking in the logs I see:
> We (Rob Banz and I) are seeing the same thing on Solaris 10 x86. We
> started our mass mail migration this past monday and a number of user
> migrations have failed due to the same error.
> We haven't found the cause yet, but to get around it for now we
> cranked up the per-process FD limit and limited the number of
> requests a imapd is allowed to handle. It looks like a file
> descriptor leak of some sort. So far that has been a decent work-around.
> /dale
> --
> Dale Ghent
> Specialist, Storage and UNIX Systems
> UMBC - Office of Information Technology
> ECS 201 - x51705
> ----
> Cyrus Home Page:
> Cyrus Wiki/FAQ:
> List Archives/Info:

Alain Spineux
aspineux gmail com
May the sources be with you
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