Hi,

since upgrading to Dovecot 2.3.7 I get the following new errors:

2019-07-15 09:10:52 mail dovecot: imap(paul@iwascoding.com)<32484><goWh8rKNSNZfqJ9R>: Error: file_lock_free(): Unexpectedly failed to retry locking /var/spool/mail/iwascoding/paul/mdbox/mailboxes/INBOX/dbox-Mails/dovecot-vsize.lock: fcntl(/var/spool/mail/iwascoding/paul/mdbox/mailboxes/INBOX/dbox-Mails/dovecot-vsize.lock, write-lock, F_SETLK) locking failed: No such file or directory

It seems that this is related to moving or deleting mails (IMAP). The file at least sometimes exists, the folder exists. You find my doveconf below.

Thanks, Paul

# 2.3.7 (494d20bdc): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.7 (5a4e63b5) # OS: Linux 4.9.0-9-amd64 x86_64 Debian 9.9 # Hostname: mail.iwascoding.com auth_cache_size = 10 M auth_cache_ttl = 2 hours auth_mechanisms = plain login default_vsz_limit = 1 G first_valid_gid = 8 first_valid_uid = 8 hostname = mail.iwascoding.com imap_capability = +SPECIAL-USE last_valid_gid = 8 last_valid_uid = 8 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes mail_attachment_detection_options = add-flags-on-save mail_attribute_dict = file:/var/mail/iwascoding/%n/dovecot-attributes mail_gid = 8 mail_home = /var/mail/iwascoding/%n mail_location = mdbox:~/mdbox mail_plugins = quota listescape fts fts_xapian mail_prefetch_count = 200 mail_uid = 8 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 spamtest spamtestplus mdbox_rotate_size = 16 M namespace inbox { inbox = yes location = mailbox "Sent Messages" { auto = no special_use = \Sent } mailbox archive { auto = no special_use = \Archive } mailbox drafts { auto = no special_use = \Drafts } mailbox junk { auto = no special_use = \Junk } mailbox sent { auto = no special_use = \Sent } mailbox trash { auto = no special_use = \Trash } prefix = separator = / } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { fts = xapian fts_autoindex = yes fts_autoindex_exclude = \Junk fts_autoindex_exclude2 = \Trash fts_autoindex_exclude3 = \Drafts fts_enforced = yes fts_xapian = partial=2 full=20 plugin = fts fts_xapian quota = count:User quota quota_grace = 10%% quota_rule = *:storage=200M quota_vsizes = yes recipient_delimiter = + sieve = /var/mail/iwascoding/%n/.dovecot.sieve sieve_default = /var/lib/dovecot/sieve/default.sieve sieve_dir = /var/mail/iwascoding/%n/sieve sieve_extensions = +spamtest +spamtestplus sieve_global_dir = /var/lib/dovecot/sieve/global sieve_spamtest_max_value = 200 sieve_spamtest_status_header = X-Spam-Score-Int sieve_spamtest_status_type = score } postmaster_address = postmaster@iwascoding.com protocols = imap pop3 lmtp sieve submission quota_full_tempfail = yes service auth { unix_listener auth-client { mode = 0600 user = Debian-exim } unix_listener auth-userdb { user = mail } vsz_limit = 4 G } service imap-login { inet_listener imap { port = 0 } } service indexer-worker { vsz_limit = 2 G } service lmtp { user = mail } service managesieve-login { inet_listener sieve { port = 4190 } } service pop3-login { inet_listener pop3 { port = 0 } } service stats { unix_listener stats-writer { user = mail } } service submission-login { inet_listener submission_ssl { port = 465 ssl = yes } } ssl = required ssl_alt_cert = </usr/local/acme/var/iwascoding.com/fullchain.cer ssl_alt_key = # hidden, use -P to show it ssl_cert = </usr/local/acme/var/iwascoding.com_ecc/fullchain.cer ssl_cipher_list = ALL:HIGH:!SSLv2:!SSLv3:!kRSA:!MEDIUM:!LOW:!EXP:!RC4:!MD5:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!PSK:!SRP:!DSS:!SEED:@STRENGTH ssl_client_ca_dir = /etc/ssl/certs ssl_client_ca_file = /etc/ssl/certs/ca-certificates.crt ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 ssl_prefer_server_ciphers = yes submission_client_workarounds = whitespace-before-path submission_max_mail_size = 50 M submission_relay_host = mail.iwascoding.com submission_relay_port = 10025 submission_relay_ssl = smtps userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { mail_fsync = optimized mail_plugins = quota listescape fts fts_xapian sieve } protocol !indexer-worker { mail_vsize_bg_after_count = 100 } protocol lda { mail_fsync = optimized mail_plugins = quota listescape fts fts_xapian sieve } protocol imap { imap_metadata = yes mail_max_userip_connections = 40 mail_plugins = quota listescape fts fts_xapian imap_quota imap_zlib } protocol pop3 { mail_max_userip_connections = 30 }