Hi,
Sorry, the problem is back! Not solved, again no change except that I lowered the limits again and restarted dovecot. Here is what it looks like:
lsof -a -i4 -i6 -itcp | fgrep imap-logi | wc 9
--> There are 9 TCP connections to imap-login.
ps aux | fgrep imap-login | wc 81 ps aux | fgrep imap | wc 90
--> There are 90-81 = 9 IMAP worker processes (OK) and 81 imap-login processes (not OK). Thunderbird cannot connect again.
ps auxf | fgrep dove root 28118 0.0 0.0 4200 2752 ? Ss Feb03 0:02 /usr/sbin/dovecot -F dovecot 28138 0.0 0.0 4176 2224 ? S Feb03 0:01 \_ dovecot/anvil root 28139 0.0 0.0 4172 2436 ? S Feb03 0:00 \_ dovecot/log root 28140 0.0 0.0 6764 4636 ? S Feb03 0:05 \_ dovecot/config dovecot 28143 0.0 0.0 5360 3584 ? S Feb03 0:01 \_ dovecot/stats dovenull 28206 0.0 0.0 8200 4652 ? S Feb03 0:02 \_ dovecot/imap-login USER2 28207 0.0 0.0 6356 3988 ? S Feb03 0:02 \_ dovecot/imap dovenull 28234 0.0 0.0 8200 4712 ? S Feb03 0:02 \_ dovecot/imap-login USER1 28235 0.0 0.0 6356 2924 ? S Feb03 0:02 \_ dovecot/imap dovenull 28275 0.0 0.0 8200 4716 ? S Feb03 0:02 \_ dovecot/imap-login USER1 28276 0.0 0.0 9416 7308 ? S Feb03 0:03 \_ dovecot/imap dovenull 19673 0.0 0.0 8212 6380 ? S Feb04 0:00 \_ dovecot/imap-login USER3 19674 0.0 0.0 14220 7680 ? S Feb04 0:01 \_ dovecot/imap dovenull 21688 0.0 0.0 8200 6416 ? S Feb04 0:01 \_ dovecot/imap-login USER2 21690 0.0 0.0 9604 8504 ? S Feb04 0:01 \_ dovecot/imap dovenull 22398 0.0 0.0 8200 6440 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 22400 0.0 0.0 8200 6384 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 22593 0.0 0.0 8200 6292 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 22595 0.0 0.0 8200 6312 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 22814 0.0 0.0 8200 6324 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 22816 0.0 0.0 8200 6312 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 23026 0.0 0.0 8200 6384 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 23028 0.0 0.0 8200 6340 ? S Feb04 0:00 \_ dovecot/imap-login .......(skipped some lines of imap-login)........ dovenull 23179 0.0 0.0 8200 6412 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 23181 0.0 0.0 8200 6368 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 23421 0.0 0.0 8200 6284 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 23423 0.0 0.0 8200 6412 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 23611 0.0 0.0 8200 6380 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 23613 0.0 0.0 8200 6296 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 23797 0.0 0.0 8200 6464 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 23799 0.0 0.0 8200 6296 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 24029 0.0 0.0 8200 6300 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 24031 0.0 0.0 8200 6188 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 24205 0.0 0.0 8200 6340 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 24207 0.0 0.0 8200 6320 ? S Feb04 0:00 \_ dovecot/imap-login dovenull 5628 0.0 0.0 8212 6408 ? S 08:59 0:00 \_ dovecot/imap-login USER1 5629 0.0 0.0 7844 6460 ? S 08:59 0:00 \_ dovecot/imap optores 5630 0.0 0.0 6356 4444 ? S 08:59 0:00 \_ dovecot/imap USER1 5631 0.0 0.0 6372 4568 ? S 08:59 0:00 \_ dovecot/imap dovenull 6373 0.0 0.0 8200 6224 ? S 09:43 0:00 \_ dovecot/imap-login USER1 6375 0.0 0.0 7052 5900 ? S 09:43 0:00 \_ dovecot/imap
The config is the same as last time except for this:
auth_worker_max_count = 100 default_process_limit = 80
Which should be more than enough.
Any ideas? Wolfgang
On 2/3/21 8:19 PM, Wolfgang wrote:
Hi,
But as Aki said, doveconf -n is crucial, especially since you upgraded from an older version.
Thank you for your response. Unfortunately, I missed the first e-mail a few days ago.
Interestingly it does no longer happen since a few days. We're seeing one IMAP and one IMAP-LOGIN process per connection now which is the expected behavior.
It's completely unclear to me why this does not longer happen now.
Anyway, here's the doveconf output in case you spot something.
Thank you, Wolfgang
# 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-11-amd64 x86_64 Debian 10.7 # Hostname: static...... auth_mechanisms = scram-sha-1 digest-md5 cram-md5 plain auth_worker_max_count = 300 default_process_limit = 200 first_valid_uid = 1000 hostname = ....... log_timestamp = "%Y-%m-%d %H:%M:%S " mail_location = maildir:~/Maildir mail_plugins = quota acl mail_privileged_group = mail mail_server_admin = postmaster@....... 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 editheader 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 = separator = / type = private } namespace zzzzz { list = children location = maildir:%%h/Maildir-xxx:INDEX=~/index_shared/%%u prefix = shared/%%u/ separator = / subscriptions = no type = shared } passdb { args = /etc/dovecot/shadow driver = passwd-file } plugin { acl = vfile acl_shared_dict = file:/var/mail/shared-%d/shared-mailboxes quota = maildir:User quota quota_rule = *:storage=1G quota_warning = storage=90%% quota-warning 90 %u sieve = file:~/sieve;active=~/dovecot.sieve sieve_extensions = +editheader } postmaster_address = postmaster@xxxxxxx.de protocols = " imap sieve sieve" service auth-worker { chroot = yes user = $default_internal_user } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } } service imap-login { vsz_limit = 64 M } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } ssl_cert = :storage=1G driver = passwd-file } protocol lda { mail_plugins = quota acl sieve } protocol imap { mail_max_userip_connections = 32 mail_plugins = quota acl imap_quota imap_acl }