Too many open files
Rob.McMahon at warwick.ac.uk
Tue Nov 4 07:39:18 EST 2008
Shelley Waltz wrote:
> Oddly enough I had the identical issue today while trying to remove a
> bunch of users. I am running cyrus-imapd-2.3.7-2.el5 on RHEL5.
> I used cyradm and did
> sam user.x anyone c
> dm user.x
> This worked fine for about 20 users, then I got the following in maillog ...
> Nov 3 10:35:28 rr imap: IOERROR: opening quota file
> /var/lib/imap/quota/x/user.x: Too many open files
> Nov 3 10:35:28 rr imap: DBERROR: error fetching user.x: cyrusdb error
> Nov 3 10:35:28 rr imap: Deleted mailbox user.x
> If I look in /var/spool/imap/x/user/ the directory and folders for user
> x are still there. If I try to remove the mailbox once again using
> cyradm, it claims the mailbox does not exist.
> How does one resolve this issue safely?
I have the same problem with a few mailboxes myself, and don't know how
to clean it up.
To avoid the problem in the first place, if you have just a few (tens ?
couple of hundred) users beginning with the same prefix, I think you can
avoid the problem in the first place by putting e.g.
imap cmd="imapd" listen="imap" prefork=0 maxfds=4096
I suspect the underlying cause is this chunk from
/* strip off the qr specific path and replace with pattern */
sprintf(strstr(quota_path, FNAME_QUOTADIR) + strlen(FNAME_QUOTADIR),
/* search for the quotaroots */
glob(quota_path, GLOB_NOSORT, NULL, &globbuf);
That pattern on our boxes can match thousands of users. I think it
needs to be more careful and go looking for `prefix' and `prefix.*', but
I haven't dug into it far enough yet.
E-Mail: Rob.McMahon at warwick.ac.uk PHONE: +44 24 7652 3037
Rob McMahon, IT Services, Warwick University, Coventry, CV4 7AL, England
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