[Dovecot] Dovecot stops to work - anvil problem
FABIO FERRARI
fabio.ferrari at unimore.it
Fri Oct 26 13:24:42 EEST 2012
Hi all,
we have a problem about anvil, it seems that when we have a high load the
dovecot stops to work. Sometimes it is sufficient to make a dovecot
reload, but sometimes we have to restart it.
These are the lines related to anvil in the dovecot.log:
[root at secchia ~]# grep anvil /var/log/dovecot.log | more
Oct 26 11:13:55 anvil: Error: net_accept() failed: Too many open files
Oct 26 11:14:32 imap-login: Error: net_connect_unix(anvil) failed:
Resource temporarily unavailable
Oct 26 11:14:32 imap-login: Fatal: Couldn't connect to anvil
Oct 26 11:14:33 pop3-login: Error: net_connect_unix(anvil) failed:
Resource temporarily unavailable
Oct 26 11:14:33 pop3-login: Fatal: Couldn't connect to anvil
[...] (many lines like these)
Oct 26 12:01:10 pop3-login: Fatal: Couldn't connect to anvil
Oct 26 12:01:18 auth: Error: read(anvil-auth-penalty) failed: Connection
reset by peer
Oct 26 12:01:18 auth: Error: read(anvil-auth-penalty) failed: Connection
reset by peer
Oct 26 12:01:18 auth: Error: net_connect_unix(anvil-auth-penalty) failed:
Connection refused
Oct 26 12:01:18 auth: Error: net_connect_unix(anvil-auth-penalty) failed:
Connection refused
Oct 26 12:01:18 auth: Error: read(anvil-auth-penalty) failed: Connection
reset by peer
Oct 26 12:01:18 auth: Error: net_connect_unix(anvil-auth-penalty) failed:
Connection refused
And this is the output of the doveconf -n:
[root at secchia ~]# doveconf -n
# 2.0.1: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.18-308.11.1.el5 x86_64 Red Hat Enterprise Linux Server
release 5.8 (Tikanga) xfs
auth_cache_size = 1024
auth_cache_ttl = 21600 s
auth_debug = yes
auth_debug_passwords = yes
auth_master_user_separator = *
auth_mechanisms = plain login
auth_socket_path = /var/run/dovecot/auth-userdb
auth_verbose = yes
base_dir = /var/run/dovecot/
disable_plaintext_auth = no
hostname = mail.unimore.it
info_log_path = /var/log/dovecot.log
lda_mailbox_autocreate = yes
log_path = /var/log/dovecot.log
mail_debug = yes
mail_location = maildir:/cl/mail/vhosts/sms.unimo.it/%Ln/Maildir
mail_plugins = $mail_plugins quota
mailbox_idle_check_interval = 60 s
mbox_write_locks = fcntl
namespace {
inbox = yes
location =
prefix = INBOX.
separator = .
type = private
}
passdb {
args = /usr/local/etc/dovecot.masterusers
driver = passwd-file
master = yes
}
passdb {
args = dovecot
driver = pam
}
plugin {
quota = maildir:User quota
quota_exceeded_message = Quota exceeded (mailbox is full)
quota_rule = *:storage=200MB
quota_rule2 = *:messages=100000
quota_rule3 = INBOX.Trash:storage=+100M
quota_warning = storage=90%% quota-warning 90 %u
quota_warning2 = storage=85%% quota-warning 85 %u
quota_warning3 = messages=95%% quota-warning 95 %u
quota_warning4 = messages=80%% quota-warning 80 %u
setting_name = quota
}
postmaster_address = postmaster at unimore.it
quota_full_tempfail = yes
service anvil {
client_limit = 199999
process_limit = 199999
}
service auth {
client_limit = 14500
unix_listener auth-userdb {
mode = 0600
user = vmail
}
}
service imap-login {
inet_listener imap {
port = 143
}
inet_listener imaps {
port = 993
}
process_limit = 5000
}
service imap {
process_limit = 5000
}
service pop3-login {
inet_listener pop3 {
port = 110
}
inet_listener pop3s {
port = 995
}
}
service pop3 {
process_limit = 1024
}
service quota-warning {
executable = script /usr/local/bin/quota-warning.sh
unix_listener quota-warning {
group = vmail
user = vmail
}
user = dovecot
}
ssl_ca = </etc/pki/tls/certs/ca_unimore_tcs.pem
ssl_cert = </etc/pki/tls/certs/cert-852-mail.unimore.it-cluster.pem
ssl_key = </etc/pki/tls/certs/mailcluster.key
userdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
verbose_ssl = yes
protocol lda {
mail_plugins = $mail_plugins quota
}
protocol imap {
mail_plugins = $mail_plugins imap_quota
}
protocol pop3 {
mail_plugins = $mail_plugins quota
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
pop3_uidl_format = %08Xu%08Xv
}
[root at secchia ~]#
And these are the limit settings in the OS:
* soft nofile 131072
* hard nofile 131072
Have someone had the same problem?
thanks in advance
Fabio Ferrari
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