dovecot - Jan 2022 - Errors: Failed to map transaction log, Corrupted transaction log, imeout (180s) while waiting for lock for transaction log

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

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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
Universit?t Konstanz
Kommunikations-, Informations-, Medienzentrum (KIM)
Abteilung IT-Dienste Forschung und Lehre
78457 Konstanz
+49 7531 88-4416

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