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@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@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@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 =

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