doveadm: Error: open(/proc/self/io) failed

[me at tdiehl.org]

Does anyone have an Idea how to fix this?

Regards,

-- 
Tom			me at tdiehl.org

On Mon, 22 Jul 2019, Tom Diehl via dovecot wrote:

> Hi,
>
> I am running dovecot-2.2.36-3.el7.x86_64 on a Centos 7 machine. I keep seeing
> the following errors in the dovecot.log:
> Jul 22 12:52:04 vmail2 dovecot: doveadm: Error: open(/proc/self/io) failed: 
> Permission denied
>
> Dovecot -n is listed below:
> #  2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf
> #  Pigeonhole version 0.4.24 (124e06aa)
> #  OS: Linux 3.10.0-957.21.3.el7.x86_64 x86_64 CentOS Linux release 7.6.1810 
> #  (Core) Hostname: vmail2.kmg.mydomain.com
> auth_master_user_separator = *
> auth_mechanisms = PLAIN LOGIN
> deliver_log_format = from=%{from}, envelope_sender=%{from_envelope}, 
> subject=%{subject}, msgid=%m, size=%{size}, %$
> dict {
>   acl = mysql:/etc/dovecot/dovecot-share-folder.conf
>   quotadict = mysql:/etc/dovecot/dovecot-used-quota.conf
> }
> doveadm_password =  # hidden, use -P to show it
> doveadm_port = 2525
> first_valid_uid = 2000
> last_valid_uid = 2000
> mail_gid = 2000
> mail_location = maildir:%Lh/Maildir/:INDEX=%Lh/Maildir/
> mail_plugins = quota mailbox_alias acl mail_log notify stats replication
> mail_uid = 2000
> 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 index ihave 
> duplicate mime foreverypart extracttext imapsieve vnd.dovecot.imapsieve
> namespace {
>   inbox = yes
>   location =
>   mailbox Archive {
>     auto = no
>     special_use = \Archive
>   }
>   mailbox Archives {
>     auto = no
>     special_use = \Archive
>   }
>   mailbox "Deleted Messages" {
>     auto = no
>     special_use = \Trash
>   }
>   mailbox Drafts {
>     auto = subscribe
>     special_use = \Drafts
>   }
>   mailbox Junk {
>     auto = subscribe
>     special_use = \Junk
>   }
>   mailbox "Junk E-mail" {
>     auto = no
>     special_use = \Junk
>   }
>   mailbox Sent {
>     auto = subscribe
>     special_use = \Sent
>   }
>   mailbox "Sent Items" {
>     auto = no
>     special_use = \Sent
>   }
>   mailbox "Sent Messages" {
>     auto = no
>     special_use = \Sent
>   }
>   mailbox Spam {
>     auto = no
>     special_use = \Junk
>   }
>   mailbox Trash {
>     auto = subscribe
>     special_use = \Trash
>   }
>   prefix =
>   separator = /
>   type = private
> }
> namespace {
>   list = children
>   location = maildir:%%Lh/Maildir/:INDEX=%%Lh/Maildir/Shared/%%Ld/%%Ln
>   prefix = Shared/%%u/
>   separator = /
>   subscriptions = yes
>   type = shared
> }
> passdb {
>   args = /etc/dovecot/dovecot-mysql.conf
>   driver = sql
> }
> passdb {
>   args = /etc/dovecot/dovecot-master-users
>   driver = passwd-file
>   master = yes
> }
> plugin {
>   acl = vfile
>   acl_shared_dict = proxy::acl
>   fts_autoindex = yes
>   fts_autoindex_max_recent_msgs = 50
>   imapsieve_mailbox1_before =
>   file:/usr/lib64/dovecot/sieve/report-spam.sieve
>   imapsieve_mailbox1_causes = COPY
>   imapsieve_mailbox1_name = Spam
>   imapsieve_mailbox2_before = file:/usr/lib64/dovecot/sieve/report-ham.sieve
>   imapsieve_mailbox2_causes = COPY
>   imapsieve_mailbox2_from = Spam
>   imapsieve_mailbox2_name = *
>   mail_log_events = delete undelete expunge mailbox_delete mailbox_rename
>   mail_log_fields = uid box msgid size from subject
>   mail_replica = tcp:vmail1.kmg.mydomain.com
>   mailbox_alias_new = Sent Messages
>   mailbox_alias_new2 = Sent Items
>   mailbox_alias_old = Sent
>   mailbox_alias_old2 = Sent
>   quota = dict:user::proxy::quotadict
>   quota_grace = 10%%
>   quota_warning = storage=100%% quota-warning 100 %u
>   quota_warning2 = storage=95%% quota-warning 95 %u
>   quota_warning3 = storage=90%% quota-warning 90 %u
>   quota_warning4 = storage=85%% quota-warning 85 %u
>   sieve = ~/sieve/dovecot.sieve
>   sieve_before = /var/vmail/sieve/dovecot.sieve
>   sieve_dir = ~/sieve
>   sieve_global_dir = /var/vmail/sieve
>   sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.execute
>   sieve_max_redirects = 30
>   sieve_pipe_bin_dir = /usr/lib64/dovecot/sieve
>   sieve_plugins = sieve_imapsieve sieve_extprograms
>   sieve_vacation_send_from_recipient = yes
>   stats_refresh = 30 secs
>   stats_track_cmds = yes
> }
> protocols = pop3 imap sieve lmtp
> service aggregator {
>   fifo_listener replication-notify-fifo {
>     user = vmail
>   }
>   unix_listener replication-notify {
>     user = vmail
>  }
> }
> service auth {
>   unix_listener /var/spool/postfix/private/dovecot-auth {
>     group = postfix
>     mode = 0666
>     user = postfix
>   }
>   unix_listener auth-master {
>     group = vmail
>     mode = 0666
>     user = vmail
>   }
>   unix_listener auth-userdb {
>     group = vmail
>     mode = 0660
>     user = vmail
>  }
> }
> service config {
>   unix_listener config {
>     user = vmail
>  }
> }
> service dict {
>   unix_listener dict {
>     group = vmail
>     mode = 0660
>     user = vmail
>  }
> }
> service doveadm {
>   inet_listener {
>     port = 2525
>   }
>   user = vmail
> }
> service imap-login {
>   process_limit = 500
>   service_count = 1
> }
> service lmtp {
>   executable = lmtp -L
>   inet_listener lmtp {
>     address = 127.0.0.1
>     port = 24
>   }
>   process_min_avail = 5
>   unix_listener /var/spool/postfix/private/dovecot-lmtp {
>     group = postfix
>     mode = 0600
>     user = postfix
>   }
>   user = vmail
> }
> service managesieve-login {
>   inet_listener sieve {
>     address = 127.0.0.1
>     port = 4190
>  }
> }
> service pop3-login {
>  service_count = 1
> }
> service quota-warning {
>   executable = script /usr/local/bin/dovecot-quota-warning.sh
>   unix_listener quota-warning {
>     group = vmail
>     mode = 0660
>     user = vmail
>  }
> }
> service replicator {
>   process_min_avail = 1
>   unix_listener replicator-doveadm {
>     group = vmail
>     mode = 0666
>  }
> }
> service stats {
>   fifo_listener stats-mail {
>     mode = 0644
>     user = vmail
>   }
>   inet_listener {
>     address = 127.0.0.1
>     port = 24242
>  }
> }
> ssl = required
> ssl_cert = </etc/pki/tls/certs/my_cert.crt
> ssl_cipher_list = 
> ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5
> ssl_client_ca_file = /etc/pki/tls/cert.pem
> ssl_key =  # hidden, use -P to show it
> ssl_prefer_server_ciphers = yes
> syslog_facility = local5
> userdb {
>   args = /etc/dovecot/dovecot-mysql.conf
>   driver = sql
> }
> protocol lda {
>   lda_mailbox_autocreate = yes
>   lda_mailbox_autosubscribe = yes
>   mail_plugins = quota mailbox_alias acl mail_log notify stats replication
>   sieve
> }
> protocol lmtp {
>   lmtp_save_to_detail_mailbox = yes
>   mail_plugins = quota sieve
>   recipient_delimiter = +
> }
> protocol imap {
>   imap_client_workarounds = tb-extra-mailbox-sep
>   mail_max_userip_connections = 30
>   mail_plugins = quota mailbox_alias acl mail_log notify stats replication
>   imap_quota imap_acl imap_stats imap_sieve
> }
> protocol pop3 {
>   mail_max_userip_connections = 30
>   mail_plugins = quota mailbox_alias acl mail_log notify stats replication
>   pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
>   pop3_uidl_format = %08Xu%08Xv
> }
>
> Everything seems to be working properly and the dovecot wiki says that 
> /proc/self/io
> is for statistics. I am thinking they are harmless but they are generating a 
> bunch
> of noise in the logs and if harmless, I would like to silence them.
>
> Can someone let me know what causes this and if I should be concerned about 
> this?
>
> My Google foo has not been helpful on this.
>
> Regards,
>
>