[Dovecot] Request queue is full

[Raphael Bittencourt S. Costa]

Hello all,

Today I had problems on one of the servers. Dovecot stopped working and
I got lots of "Request queue is full" on logs.

Aug 14 16:49:45 mailserver03 dovecot: auth(default):
ldap(xxx at xxx.com.br): Request queue is full
Aug 14 16:49:45 mailserver03 dovecot: auth(default):
ldap(xxxxx at xxxx.com.br): Request queue is full
Aug 14 16:49:45 mailserver03 dovecot: auth(default):
ldap(xxxx at xxxxx.com,10.0.3.1): Request queue is full

Only after a restart on dovecot daemon the services worked again. Does
anyone know how can I fix this problem?


The server were with about 900 imap connections and 300 pop3
connections.

# 1.1.1: /etc/dovecot//dovecot.conf
syslog_facility: local1
protocols: imap pop3
ssl_disable: yes
disable_plaintext_auth: no
shutdown_clients: no
login_dir: /usr//var/run/dovecot/login
login_executable(default): /usr//libexec/dovecot/imap-login
login_executable(imap): /usr//libexec/dovecot/imap-login
login_executable(pop3): /usr//libexec/dovecot/pop3-login
login_process_per_connection: no
login_greeting_capability(default): yes
login_greeting_capability(imap): yes
login_greeting_capability(pop3): no
login_process_size: 128
login_processes_count: 30
login_max_processes_count: 1024
login_max_connections: 512
max_mail_processes: 10240
mail_max_userip_connections(default): 20
mail_max_userip_connections(imap): 20
mail_max_userip_connections(pop3): 10
mail_uid: 1033
mail_gid: 1033
mail_location: maildir:%h/Maildir
mail_executable(default): /usr//libexec/dovecot/imap
mail_executable(imap): /usr//libexec/dovecot/imap
mail_executable(pop3): /usr//libexec/dovecot/pop3
mail_plugins(default): quota imap_quota autocreate
mail_plugins(imap): quota imap_quota autocreate
mail_plugins(pop3): quota
mail_plugin_dir(default): /usr//lib/dovecot/imap
mail_plugin_dir(imap): /usr//lib/dovecot/imap
mail_plugin_dir(pop3): /usr//lib/dovecot/pop3
pop3_no_flag_updates(default): no
pop3_no_flag_updates(imap): no
pop3_no_flag_updates(pop3): yes
pop3_uidl_format(default): %08Xu%08Xv
pop3_uidl_format(imap): %08Xu%08Xv
pop3_uidl_format(pop3): %f
pop3_client_workarounds(default): 
pop3_client_workarounds(imap): 
pop3_client_workarounds(pop3): outlook-no-nuls
namespace:
  type: private
  prefix: INBOX.
  inbox: yes
  list: yes
  subscriptions: yes
auth default:
  mechanisms: plain login
  passdb:
    driver: ldap
    args: /etc/dovecot/dovecot-ldap.conf
  userdb:
    driver: prefetch
  userdb:
    driver: ldap
    args: /etc/dovecot/dovecot-ldap.conf
  socket:
    type: listen
    master:
      path: /var/run/dovecot/auth-master
      mode: 438
plugin:
  quota: maildir
  quota_rule: *:bytes=10240
  quota_rule2: *:messages=30000
  quota_rule3: Trash:bytes=10%%
  autocreate: SPAM.E Spam
  autocreate2: SPAM.Marcar Spam
  autocreate3: SPAM
  autocreate4: SPAM.Desmarcar Spam




[]s,

Raphael Costa





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