imap-login: Fatal: pipe() failed: Too many open files

26 Jan 2015 · *not*


      Hi
I keep on getting errors and can't connect/login to Dovecot. I did my
research but unfortunately without success. It is for sure not ulimit
because ulimit is set to unlimited per default already. Still , it
complains about "Too many open files" but this is a test system and the
service dovecot and postfix have just been started. No one except me is
testing on this system. This is very weired ;/
root@WM-01 [~]$ service dovecot stop; service postfix stop ; echo "" >
/var/log/maillog ; echo "" > /var/log/slapd.log ; service postfix start
; service dovecot start
Stopping dovecot.
Waiting for PIDS: 3245.
postfix/postfix-script: stopping the Postfix mail system
postfix/postfix-script: starting the Postfix mail system
Starting dovecot.
root@WM-01 [~]$ telnet 127.0.0.1 143
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.
root@WM-01 [~]$ cat /var/log/mail
Jan 26 01:39:12 WM-01 dovecot: imap-login: Fatal: pipe() failed: Too
many open files
Jan 26 01:39:12 WM-01 dovecot: master: Error: service(imap-login):
command startup failed, throttling for 4 secs
If I uncoment port = 0 in POP and IMAP then it looks even worse then
above. Telnet is not even closed by remote host and three of the "Too
many open files" errors are showing up in maillog:
root@WM-01 [~]$ telnet 127.0.0.1 143
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
^]
telnet> Connection closed.
root@WM-01 [~]$ cat /var/log/maillog
Jan 26 01:45:19 WM-01 postfix/postfix-script[60560]: starting the
Postfix mail system
Jan 26 01:45:19 WM-01 postfix/master[60562]: daemon started -- version
1.0, configuration /usr/local/etc/postfix
Jan 26 01:45:19 WM-01 dovecot: master: Dovecot v2.2.15 starting up for
imap, pop3, lmtp
Jan 26 01:45:24 WM-01 dovecot: imap-login: Error: socket(login) failed:
Too many open files
Jan 26 01:45:24 WM-01 dovecot: imap-login: Error: auth: connect(login)
failed: Too many open files
Jan 26 01:45:24 WM-01 dovecot: imap-login: Error: net_accept() failed:
Too many open files
root@WM-01 [~]$
Does anyone have an idea what could be wrong here? I attached the
relevant configuration below. I use OpenLDAP as backend.
Please let me know if you need more information. Thank you very much.
Best Regards,
Leander
# ========================== dovecot -n ============================== #
# 2.2.15: /usr/local/etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.6 (3e924b1b6c5c+)
# OS: FreeBSD 10.1-RELEASE amd64  ufs
auth_debug = yes
auth_debug_passwords = yes
auth_failure_delay = 3 secs
auth_mechanisms = plain login
auth_verbose = yes
auth_verbose_passwords = yes
base_dir = /var/run/dovecot/
disable_plaintext_auth = no
imap_client_workarounds = delay-newmail tb-extra-mailbox-sep tb-lsub-flags
lda_mailbox_autocreate = yes
lda_mailbox_autosubscribe = yes
login_greeting = Welcome to Mail Server.
login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c %k
mail_debug = yes
mail_gid = vmail
mail_location = maildir:/var/mail/%d/%n
mail_plugins = quota expire mail_log notify
mail_privileged_group = mail
mail_temp_dir = /tmp/Dovecot
mail_uid = vmail
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 ihave duplicate
namespace inbox {
inbox = yes
location =
mailbox Drafts {
special_use = \Drafts
}
mailbox Junk {
special_use = \Junk
}
mailbox Sent {
special_use = \Sent
}
mailbox "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
special_use = \Trash
}
prefix =
}
passdb {
args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext
driver = ldap
}
plugin {
expire = Trash
mail_log_events = delete undelete expunge copy mailbox_delete
mailbox_rename
mail_log_fields = uid box msgid size
quota = maildir:User quota
quota_exceeded_message = Storage quota for this account has been
exceeded, please try again later.
quota_rule = *:storage=1G
quota_rule2 = Trash:storage=+30%%
quota_rule3 = Sent:storage=+30%%
quota_warning = storage=90%% quota-warning 90 %u
quota_warning2 = storage=75%% quota-warning 75 %u
}
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
postmaster_address = info@netocean.de
sendmail_path = /usr/local/sbin/sendmail
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0660
user = postfix
}
unix_listener auth-userdb {
group = vmail
mode = 0600
user = vmail
}
}
service imap-login {
inet_listener imaps {
port = 0
}
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0660
user = postfix
}
user = vmail
}
service pop3-login {
inet_listener pop3s {
port = 0
}
}
service quota-warning {
executable = script /usr/local/bin/quota-warning.sh
unix_listener quota-warning {
user = vmail
}
user = vmail
}
ssl = required
ssl_cert = </etc/ssl/RootCA/certs/192.168.50.101.pem
ssl_cipher_list =
EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH:+CAMELLIA256:+AES256:+CAMELLIA128:+AES128:SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!ECDSA:CAMELLIA256-SHA:AES256-SHA:CAMELLIA128-SHA:AES128-SHA
ssl_key = </etc/ssl/RootCA/certs/192.168.50.101.key
ssl_prefer_server_ciphers = yes
ssl_protocols = !SSLv2 !SSLv3
userdb {
driver = prefetch
}
userdb {
args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext
driver = ldap
}
verbose_ssl = yes
protocol lda {
mail_plugins = sieve
}
protocol imap {
mail_max_userip_connections = 3
mail_plugins = imap_quota imap_zlib
}
protocol pop3 {
mail_max_userip_connections = 3
}
# ======================== dovecot/conf.d/auth-ldap.conf.ext
=================== #
passdb {
driver = ldap
# Path for LDAP configuration file, see
example-config/dovecot-ldap.conf.ext
args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext
}
# "prefetch" user database means that the passdb already provided the
# needed information and there's no need to do a separate userdb lookup.
# <doc/wiki/UserDatabase.Prefetch.txt>
userdb {
driver = prefetch
}
userdb {
driver = ldap
args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext
# Default fields can be used to specify defaults that LDAP may override
#default_fields = home=/home/virtual/%u
}
# ======================== dovecot/dovecot-ldap.conf.ext
=================== #
hosts = 127.0.0.1:389
dn = uid=dovecot,ou=systemuser,ou=mail,dc=MyDomain,dc=TLD
dnpass = TopSecret
tls = yes
tls_cert_file = /etc/ssl/RootCA/certs/192.168.50.101.pem
tls_key_file  = /etc/ssl/RootCA/certs/192.168.50.101.key
debug_level = -1
auth_bind = yes
ldap_version = 3
base = ou=accounts,ou=mail,dc=MyDomain,dc=TLD
scope = subtree
user_attrs = mailStorageDirectory=home, mailUidNumber=uid,
mailGidNumber=gid, mailQuotaSize=quota_rule=*:bytes=%$,
mailQuotaCount=quota_rule2
user_filter = (&(objectClass=mailAccount)(mailAddress=%u))
pass_attrs = mailAddress=user,mailPassword=password
pass_filter =
(&(objectClass=mailAccount)(mailAccountStatus=active)(mailAddress=%u))
default_pass_scheme = SSHA

Leander Schäfer

Leander Schäfer

Reindl Harald

Leander Schäfer

Leander Schäfer

Leander Schäfer

Edgar Pettijohn

Edgar Pettijohn

Edgar Pettijohn

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