signaled to death by 11 with newly created mailbox

[Simon Matter]

Hi,

On a new server, I was hit by a 'signaled to death by 11' problem
recently. Logs looked like this:

Jan 15 00:11:27 xxxx imapd[13435]: open: user xxeid opened INBOX
Jan 15 00:11:27 xxxx master[1838]: process 13435 exited, signaled to
death by 11
Jan 15 00:11:27 xxxx imapd[13617]: accepted connection
Jan 15 00:11:27 xxxx imapd[13617]: login: [192.168.9.2] xxeid plaintext
Jan 15 00:11:27 xxxx imapd[13617]: seen_db: user xxeid opened
/var/lib/imap/user/x/xxeid.seen
Jan 15 00:11:28 xxxx imapd[13617]: open: user xxeid opened INBOX
Jan 15 00:11:28 xxxx master[1838]: process 13617 exited, signaled to
death by 11

I checked the archives and found similar problem reports and the
solution was to not use pam_ldap for authentication. I have then rebuilt
cyrus-sasl with it's own, native LDAP support. Unfortunately the
'signaled to death by 11' problem didn't go away. Somebody pointed me to
a description of another 'signaled to death by 11' problem where the
solution was to reconstruct the mailbox.
I tried reconstruct -r user.xxeid and the problme was solved.

Now, my question is:
- Why does this problem only affect about ~3% of the users on this
server.
- All mailboxes were empty. They have been created by a script which
periodically reads the LDAP tree and creates mailboxes as needed.
- Should I call reconstruct -r for every newly created mailbox?

Any feedback is welcome
Simon


The server config is:
name       : Cyrus IMAPD
version    : v2.1.11-Invoca-RPM-2.1.11-6 2002/12/04 14:53:12
vendor     : Project Cyrus
support-url: http://asg.web.cmu.edu/cyrus
os         : Linux
os-version : 2.4.18-18.7.xsmp
environment: Cyrus SASL 2.1.10
             Sleepycat Software: Berkeley DB 3.3.11: (July 12, 2001)
             OpenSSL 0.9.6b [engine] 9 Jul 2001
             CMU Sieve 2.2
             TCP Wrappers
             mmap = shared
             lock = fcntl
             nonblock = fcntl
             auth = unix
             idle = poll
             mboxlist.db = skiplist
             subs.db = flat
             seen.db = skiplist
             duplicate.db = db3-nosync
             tls.db = db3-nosync