Errors: Failed to map transaction log, Corrupted transaction log, imeout (180s) while waiting for lock for transaction log

[Christian Mack]

Hello

We only saw such errors with replication between two machines, when new
emails where errornously deliverd to both of them or clients connected
to both simultaniously.

Do you have such a setup?


Kind regards,
Christian Mack

On 26.01.22 15:48, absolutely_free at libero.it wrote:
> Hi all,
> 
> I am using dovecot-2.3.17_1 on FreeBSD system.
> 
> This server offers webmail, pop3 and imap access for users.
> 
> Today I am receiving several complaints from users about slowness and/or access issues.
> 
> I checked on my /var/log/maillog and I see lots of:
> 
> 
> Error: Timeout (180s) while waiting for lock for transaction log file /var/domains/domain.it/username/Maildir/dovecot.list.index.log (WRITE lock held by pid 84939)
> 
> Error: Corrupted transaction log file /var/domains/domain.it/otherusername/Maildir/dovecot.list.index.log seq 2: indexid changed: 1643184505 -> 1643205059 (sync_offset=0)
> 
> Error: Transaction log file /var/domains/otherdomain.net/otheruser/Maildir/dovecot.list.index.log: marked corrupted
> 
> Not all users seem affected. My mailbox, for example, is working fine.
> 
> I checked on my disks (this is a ZFS volume) and I didn't find errors/warnings.
> 
> Any suggestion?
> 
> This is my dovecot configuration:
> 
> 
> # dovecot -n
> # 2.3.17 (e2aa53df5b): /usr/local/etc/dovecot/dovecot.conf
> # OS: FreeBSD 13.0-RELEASE-p6 amd64 zfs
> # Hostname: mailserver.domain.it
> auth_debug = yes
> auth_mechanisms = plain login
> auth_verbose = yes
> default_client_limit = 2000
> default_process_limit = 500
> default_vsz_limit = 512 M
> disable_plaintext_auth = no
> first_valid_gid = 125
> first_valid_uid = 125
> imap_id_log = *
> mail_gid = 1003
> mail_location = maildir:/mail/domains
> mail_privileged_group = postfix
> mail_uid = 1003
> 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-sql-crypt.conf.ext
> driver = sql
> }
> service auth {
> unix_listener /var/spool/postfix/private/auth {
> group = postfix
> mode = 0666
> user = postfix
> }
> unix_listener auth-userdb {
> group = postfix
> mode = 0600
> user = postfix
> }
> }
> service imap {
> process_limit = 1536
> }
> service lmtp {
> unix_listener /var/spool/postfix/private/dovecot-lmtp {
> group = postfix
> mode = 0600
> user = postfix
> }
> }
> ssl_cert = </etc/ssl/wildcard.domain.net_bundle.crt
> ssl_key = # hidden, use -P to show it
> userdb {
> args = /usr/local/etc/dovecot/dovecot-sql-crypt.conf.ext
> driver = sql
> }
> protocol imap {
> mail_max_userip_connections = 100
> }
> 
> Thank you very much
> 
> 


-- 
Christian Mack
Universität Konstanz
Kommunikations-, Informations-, Medienzentrum (KIM)
Abteilung IT-Dienste Forschung und Lehre
78457 Konstanz
+49 7531 88-4416

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