I try to restart dovecot 2.2.24 (for changing limits) without killing
all IMAP and POP3 sessions.
dovecot(1) tells me:
When shutdown_clients is set to no, existing sessions will continue to
use the old settings, after a dovecot reload. Also all sessions will
keep alive after a dovecot stop.
By default all active sessions will be shut down.
According to my "dovecot -n" (see below), I have set
"shutdown_clients=no", so "doveadm stop" should keep my open
sessions.
But if I try this out with a simple telnet to port 143 during
"doveadm stop", I see the following:
$ telnet imap 143
Connected to imap.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE
AUTH=PLAIN AUTH=LOGIN] Dovecot ready.
a login u...@example.com XXXXX
a OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT
SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND
URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED
I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH
LIST-STATUS BINARY MOVE QUOTA ACL RIGHTS=texk] Logged in
* BYE Server shutting down.
Connection closed by foreign host.
The "BYE Server shutting down." happens exactly at the time, when I
press return after "doveadm stop", "systemctl stop dovecot", or
"systemctl restart dovecot" in the other shell. Only
"systemctl reload dovecot" keeps the open sessions healthy.
So it seems that either the man page is wrong, or shutdown_clients=no
has no effect after dovecot stop...
Greetings
Roland
dovecot -n
# 2.2.24 (a82c823): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.14 (099a97c)
# OS: Linux 3.16.0-4-amd64 x86_64 Debian 8.5
auth_cache_negative_ttl = 5 mins
auth_cache_size = 100 M
auth_cache_ttl = 15 mins
auth_default_realm = netcologne.de
auth_master_user_separator = *
auth_mechanisms = plain login
auth_verbose = yes
dict {
acl = mysql:/etc/dovecot/dovecot-dict-sql.conf
}
disable_plaintext_auth = no
listen = *
log_timestamp = "%Y-%m-%d %H:%M:%S "
mail_fsync = always
mail_gid = 999
mail_location = maildir:~/mail
mail_plugins = acl quota zlib
mail_uid = 999
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character
vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy
include variables body enotify environment mailbox date index ihave duplicate
mime foreverypart extracttext imapflags
mmap_disable = yes
namespace {
list = children
location = maildir:%%h/mail:INDEX=~/mail/shared/%%u
prefix = shared/%%u/
separator = /
subscriptions = no
type = shared
}
namespace inbox {
inbox = yes
location =
prefix =
separator = /
type = private
}
passdb {
args = /etc/dovecot/passwd.master
driver = passwd-file
master = yes
pass = yes
}
passdb {
args = /etc/dovecot/dovecot-sql.conf
driver = sql
}
plugin {
acl = vfile
acl_shared_dict = proxy::acl
quota = maildir
sieve = ~/.dovecot.sieve
sieve_dir = ~/mail/sieve
sieve_extensions = +imapflags
zlib_save = gz
}
pop3_no_flag_updates = yes
pop3_uidl_format = %v.%u
protocols = imap pop3 sieve
service auth {
unix_listener auth-master {
group = vmail
mode = 0600
user = vmail
}
}
service dict {
unix_listener dict {
group = vmail
mode = 0600
user = vmail
}
}
service imap {
process_limit = 4000
}
service managesieve-login {
inet_listener sieve {
port = 4190
}
}
service managesieve {
process_limit = 100
}
service pop3 {
process_limit = 1000
}
shutdown_clients = no
ssl = no
syslog_facility = local2
userdb {
args = /etc/dovecot/dovecot-sql.conf
driver = sql
}
verbose_proctitle = yes
protocol imap {
mail_max_userip_connections = 10
mail_plugins = acl quota zlib imap_quota imap_acl
}
protocol pop3 {
mail_plugins = acl quota zlib
}
