Courier sorta dies on a relatively frequent basis

[Paul Martin]

Ever since the upgrade to v10, courier seems to die every half hour. Here's what it SHOULD look like when telnetting to port 143:

my vhosts # telnet localhost 143
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE ACL ACL2=UNION STARTTLS] Courier-IMAP ready. Copyright 1998-2004 Double Precision, Inc. See COPYING for distribution information.

Here's what it looks like whenever courier "dies":

my vhosts # telnet localhost 143
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.

The only thing that fixes it is bouncing the process. I have no idea why it's happening. Any help would be appreciated. Here's some technical info:

OS: CentOS x64 (fully patched)
Plesk: v10.0.1
Some stuff in /etc/courier-imap/imapd:
MAXDAEMONS=40
MAXPERIP=100
Frustration: pretty damned high

 

[IgorG]

Try to use default config:

# cat /etc/courier-imap/imapd

ADDRESS=0

PORT=143

MAXDAEMONS=40

MAXPERIP=4

PIDFILE=/var/run/imapd.pid

TCPDOPTS="-nodnslookup -noidentlookup"

AUTHMODULES="authpsa"

AUTHMODULES_ORIG=""

DEBUG_LOGIN=0

IMAP_CAPABILITY="IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE"

IMAP_KEYWORDS=1

IMAP_CAPABILITY_ORIG="IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA AUTH=CRAM-MD5 AUTH=CRAM-SHA1 IDLE"

IMAP_IDLE_TIMEOUT=60

IMAP_CAPABILITY_TLS="$IMAP_CAPABILITY AUTH=PLAIN"

IMAP_CAPABILITY_TLS_ORIG="$IMAP_CAPABILITY_ORIG AUTH=PLAIN"

IMAP_DISABLETHREADSORT=0

IMAP_CHECK_ALL_FOLDERS=0

IMAP_OBSOLETE_CLIENT=0

IMAP_ULIMITD=65536

IMAP_USELOCKS=1

IMAP_ENHANCEDIDLE=0

IMAP_TRASHFOLDERNAME=Trash

IMAP_EMPTYTRASH=Trash:7

IMAP_MOVE_EXPUNGE_TO_TRASH=0

SENDMAIL=/usr/sbin/sendmail

HEADERFROM=X-IMAP-Sender

IMAPDSTART=YES

MAILDIRPATH=Maildir
POPLOCK_TIME=30

 

[Paul Martin]

Igor: thanks for the quick reply. The only difference between the config you posted and mine is the "MAXPERIP" entry. Mine is set to 100, and yours is set to 4. I cranked it up because one of our clients is a business that has a lot of people, and they all use Thunderbird (known for opening/maintaining multiple IMAP connections). Could that be the cause of Courier having issues? If not, are there any other things I can try?

 

[Paul Martin]

Using your configuration, Courier dies more often than it used to. I have an hourly cronjob to restart Courier, but it's insufficient, as Courier seems to die within roughly 20 mins. Advice?

 

[Paul Martin]

This is a bump. I write "this is a bump" because the forums tell me that "bump" is too short.

So....bump.

 

[Paul Martin]

Still need help with this, Igor.