[Dovecot] Error: file_dotlock_open() failed with file + Too many open files

27 Aug 2013


      Hi All,
We are getting these below error on our IMAP server.
is this because of open file limits.??
We have set it to 4096.
[root@vish conf.d]# ulimit -n
4096
Aug 27 16:08:26 imap(kavish.karkera@example.com-24685): Error: file_dotlock_open() failed with file /data/quarantine/index//data/quarantine/mailstore/24685/.INBOX.kavish.karkera/dovecot.index.cache: Too many open files
Aug 27 16:08:26 imap(kavish.karkera@example.com-24685): Error: open(/data/quarantine/index//data/quarantine/mailstore/24685/.INBOX.kavish.karkera/dovecot.index.cache.lock) failed: Too many open files
Below is our dovecot conf file.
======================================================================
# 2.2.5: /usr/local/dovecot-2.2.5/etc/dovecot-imap/dovecot.conf
# OS: Linux 2.6.18-194.26.1.el5 x86_64 CentOS release 5.5 (Final)
auth_socket_path = /usr/local/var/run/dovecot2.2-imap/auth-userdb
base_dir = /usr/local/var/run/dovecot2.2-imap/
default_vsz_limit = 1 G
first_valid_gid = 99
first_valid_uid = 99
hostname =
log_path = /var/log/dovecot2.2-imap.log
mail_location = maildir:~:INDEX=/data/quarantine/index/%h:CONTROL=/data/quarantine/index/%h
mail_plugins = " virtual notify"
namespace {
inbox = no
location =
prefix =
separator = .
type = private
}
namespace {
hidden = yes
inbox = yes
list = yes
location = virtual:~/virtual:LAYOUT=maildir++:INDEX=~/virtual:CONTROL=~/virtual
prefix = virtual.
separator = .
subscriptions = no
type = private
}
namespace {
hidden = yes
inbox = no
list = no
location = maildir:~:INDEX=/data/quarantine/index/%h:CONTROL=/data/quarantine/index/%h:LAYOUT=maildir++
prefix = boxvirtual.
separator = .
subscriptions = no
type = private
}
passdb {
args = /usr/local/dovecot-2.2.5/etc/dovecot-imap/dovecot-sql.conf.ext
driver = sql
}
protocols = imap
service auth {
unix_listener auth-userdb {
group = nobody
mode = 0666
user = nobody
}
}
service imap-login {
inet_listener imap {
port = 20143
}
vsz_limit = 1 G
}
service imap-postlogin {
executable = script-login -d /usr/local/bin/dovecot.virtual.sh
unix_listener imap-postlogin {
mode = 0666
}
}
service imap {
executable = /usr/local/dovecot-2.2.5/libexec/dovecot/imap imap-postlogin
vsz_limit = 1 G
}
ssl = no
userdb {
args = /usr/local/dovecot-2.2.5/etc/dovecot-imap/dovecot-sql.conf.ext
driver = sql
}
protocol imap {
mail_max_userip_connections = 1000
mail_plugins = " virtual notify"
}
Regards,
Kavish Karkera