Connection timed out with localhost

[Gary Mills]

Can anyone shed some light on this problem?  We run a moderate-sized
Cyrus installation, using Cyrus v2.1.0pre.  One user complained that
he hadn't received mail for about three days.  The sendmail log had
errors like this:

Jan  8 15:16:18 electra sm-mta-q56m[8632]: [ID 801593 mail.info] h07FxquQ027552: to=<umassefx at cc.umanitoba.ca>, delay=1+05:16:25, xdelay=01:00:00, mailer=local, pri=1831035, relay=localhost [[UNIX: /var/run/imap/lmtp]], dsn=4.4.2, stat=Deferred: Connection timed out with localhost

The recent files in his INBOX directory looked like this:

drwx------   2 cyrus    mail         512 Jan  8 11:35 sent-mail
drwx------   2 cyrus    mail         512 Jan  6 14:49 Trash
-rw-------   1 cyrus    mail       67144 Jan  6 10:23 cyrus.cache.NEW
-rw-------   1 cyrus    mail        1980 Jan  6 10:23 cyrus.index.NEW
drwx------   2 cyrus    mail        1024 Jan  5 21:38 Sent
-rw-------   1 cyrus    mail      148362 Jan  5 21:38 216.
-rw-------   1 cyrus    mail       67144 Jan  5 21:38 cyrus.cache
-rw-------   1 cyrus    mail        1980 Jan  5 21:38 cyrus.index
-rw-------   1 cyrus    mail       27904 Jan  3 15:35 215.

When I tried to run `reconstruct' on the mailbox, it blocked trying
to do an fcntl() lock on the `cyrus.header' file.  I found many `lmtpd'
and `imapd' processes that had opens on that file.  I had to kill all
of them to get `reconstruct' to run, after which I had to restart Cyrus
master because IMAP clients were unable to connect.

What might have caused all of this?

-- 
-Gary Mills-    -Unix Support-    -U of M Academic Computing and Networking-