dovecot - Jan 2023 - replicator: Panic: data stack: Out of memory when allocating 268435496 bytes

One step further in my quest to create a replacement mail server.

I now have my old mail server (2.3.19.1, macOS + MacPorts) and my new (2.3.20,
Alpine Linux, Docker, apk package). When I turn on replication it works, but,
after a while I see:

Jan 06 00:50:31 replicator: Panic: data stack: Out of memory when allocating
268435496 bytes
Jan 06 00:50:32 replicator: Fatal: master: service(replicator): child 133 killed
with signal 6 (core dumped)
Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: replication(sysbh): Sync
failure:
Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: replication(sysbh): Remote
sent invalid input: -

I've removed synchronous operation for now (found a message on the net
suggesting that) but is this known and what does it mean?

Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>)
R&A IT Strategy <https://ea.rna.nl/> (main site)
Book: Chess and the Art of Enterprise?Architecture
<https://ea.rna.nl/the-book/>
Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/>

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On January 6, 2023 3:56:39 AM GMT+02:00, Gerben Wierda <gerben.wierda at
rna.nl> wrote:
>One step further in my quest to create a replacement mail server.
>
>I now have my old mail server (2.3.19.1, macOS + MacPorts) and my new
(2.3.20, Alpine Linux, Docker, apk package). When I turn on replication it
works, but, after a while I see:
>
>Jan 06 00:50:31 replicator: Panic: data stack: Out of memory when allocating
268435496 bytes
>Jan 06 00:50:32 replicator: Fatal: master: service(replicator): child 133
killed with signal 6 (core dumped)
>Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: replication(sysbh): Sync
failure:
>Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: replication(sysbh):
Remote sent invalid input: -
>
>I've removed synchronous operation for now (found a message on the net
suggesting that) but is this known and what does it mean?
>
>Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>)
>R&A IT Strategy <https://ea.rna.nl/> (main site)
>Book: Chess and the Art of Enterprise?Architecture
<https://ea.rna.nl/the-book/>
>Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/>
>
Dovecot default memory limit is 256M. You should probably set

service replicator {
  vsz_limit = 2G
}

because replicator might have to use more memory, especially for larger indexes.

Aki

i ran into this as well

here is the full config for mine with replication

# cat dovecot.conf
# 2.3.14 (cee3cbc0d): /usr/local/etc/dovecot/dovecot.conf
# OS: FreeBSD 12.1-RELEASE amd64
# Hostname: mail18.scom.ca

auth_debug = no
auth_debug_passwords = no

default_process_limit = 16384

mail_debug = no

#lock_method = dotlock
#mail_max_lock_timeout = 300s

#mbox_read_locks = dotlock
#mbox_write_locks = dotlock

mmap_disable = yes
dotlock_use_excl = no
mail_fsync = always
mail_nfs_storage = no
mail_nfs_index = no

auth_mechanisms = plain login
auth_verbose = yes
base_dir = /data/dovecot/run/
debug_log_path = syslog
disable_plaintext_auth = no
dsync_features = empty-header-workaround

info_log_path = syslog
login_greeting = SCOM.CA Internet Services Inc. - Dovecot ready
login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c


mail_location = maildir:~/

mail_plugins = " virtual notify replication fts fts_lucene "
mail_prefetch_count = 20

protocols = imap pop3 lmtp sieve


protocol lmtp {
 ? mail_plugins = $mail_plugins sieve
 ? postmaster_address }

service lmtp {
 ? process_limit=1000
 ? vsz_limit = 512m
 ? client_limit=1
 ?? unix_listener /usr/home/postfix.local/private/dovecot-lmtp {
 ???? group = postfix
 ???? mode = 0600
 ???? user = postfix
 ? }
}

protocol lda {
 ? mail_plugins = $mail_plugins sieve
}

service lda {
 ? process_limit=1000
 ? vsz_limit = 512m
}

service imap {
 ? process_limit=4096
 ? vsz_limit = 2g
 ? client_limit=1
}

service pop3 {
 ? process_limit=1000
 ? vsz_limit = 512m
 ? client_limit=1
}

namespace inbox {
 ? inbox = yes
 ? location  ? mailbox Drafts {
 ??? auto = subscribe
 ??? special_use = \Drafts
 ? }
 ? mailbox Sent {
 ??? auto = subscribe
 ??? special_use = \Sent
 ? }
 ? mailbox Trash {
 ??? auto = subscribe
 ??? special_use = \Trash
 ? }
 ? prefix  ? separator = /
}

passdb {
 ? args = /usr/local/etc/dovecot/dovecot-pgsql.conf
 ? driver = sql
}

doveadm_port = 12345
doveadm_password = secretxxxx

service doveadm {
 ? process_limit = 0
 ? process_min_avail = 0
 ? idle_kill = 0
 ? client_limit = 1
 ? user = vmail
 ? inet_listener {
 ??? port = 12345
 ? }
}

service config {
 ? unix_listener config {
 ??? user = vmail
 ??? }
}

dsync_remote_cmd = ssh -l%{login} %{host} doveadm dsync-server -u%u
#dsync_remote_cmd = doveadm sync -d -u%u

replication_dsync_parameters = -d -N -l 300 -U

plugin {
 ? mail_log_events = delete undelete expunge copy mailbox_delete 
mailbox_rename
 ? mail_log_fields = uid, box, msgid, from, subject, size, vsize, flags
 ? push_notification_driver = dlog

 ? sieve = file:~/sieve;active=~/sieve/.dovecot.sieve
 ? #sieve = ~/.dovecot.sieve
 ? sieve_duplicate_default_period = 1h
 ? sieve_duplicate_max_period = 1h
 ? sieve_extensions = +duplicate +notify +imapflags +vacation-seconds
 ? sieve_global_dir = /usr/local/etc/dovecot/sieve
 ? sieve_before = /usr/local/etc/dovecot/sieve/duplicates.sieve


 ? mail_replica = tcp:10.221.0.19:12345
 ? #mail_replica = remote:vmail at 10.221.0.19
 ? #replication_sync_timeout = 2

 ? fts = lucene
 ? fts_lucene = whitespace_chars=@.
 ??????? fts_autoindex = yes
 ??????? fts_languages = en
}

#sieve_extensions = vnd.dovecot.duplicate

#sieve_plugins = vnd.dovecot.duplicate

service anvil {
 ? process_limit = 1
 ? client_limit=5000
 ? vsz_limit = 512m
 ? unix_listener anvil {
 ??? group = vmail
 ??? mode = 0666
 ? }
}

service indexer-worker {
 ??????? vsz_limit = 2g
}



service auth {
 ?? process_limit = 1
 ?? client_limit=5000
 ?? vsz_limit = 1g

 ?? unix_listener auth-userdb {
 ????? mode = 0660
 ????? user = vmail
 ????? group = vmail
 ?? }
 ?? unix_listener /var/spool/postfix/private/auth {
 ????? mode = 0666
 ?? }

}

service stats {
 ? process_limit = 1000
 ? vsz_limit = 1g
 ? unix_listener stats-reader {
 ??? group = vmail
 ??? mode = 0666
 ? }
 ? unix_listener stats-writer {
 ??? group = vmail
 ??? mode = 0666
 ? }
}
userdb {
 ? args = /usr/local/etc/dovecot/dovecot-pgsql.conf
 ? driver = sql

}

protocol imap {
 ? mail_max_userip_connections = 50
 ? mail_plugins = $mail_plugins notify replication
}

protocol pop3 {
 ? mail_max_userip_connections = 50
 ? mail_plugins = $mail_plugins notify replication
}

protocol imaps {
 ? mail_max_userip_connections = 25
 ? mail_plugins = $mail_plugins notify replication
}

protocol pop3s {
 ? mail_max_userip_connections = 25
 ? mail_plugins = $mail_plugins notify replication
}


service managesieve-login {
 ? process_limit = 1000
 ? vsz_limit = 1g
 ? inet_listener sieve {
 ??? port = 4190
 ? }
}

verbose_proctitle = yes

replication_max_conns = 100

replication_full_sync_interval = 1d

service replicator {
 ? client_limit = 0
 ? drop_priv_before_exec = no
 ? idle_kill = 4294967295s
 ? process_limit = 1
 ? process_min_avail = 0
 ? service_count = 0
 ? vsz_limit = 8g
 ??????? unix_listener replicator-doveadm {
 ??? mode = 0600
 ??? user = vmail
 ? }
 ? vsz_limit = 8192M
}


service aggregator {
 ? process_limit = 1000
 ? #vsz_limit = 1g
 ? fifo_listener replication-notify-fifo {
 ??? user = vmail
 ??? group = vmail
 ??? mode = 0666
 ? }

}

service pop3-login {
 ? process_limit = 1000
 ? client_limit = 100
 ? vsz_limit = 512m
 ?}


service imap-urlauth-login {
 ? process_limit = 1000
 ? client_limit = 1000
 ? vsz_limit = 1g
}


service imap-login {
 ? process_limit=1000
 ? client_limit = 1000
 ? vsz_limit = 1g
 ?}


protocol sieve {
 ? managesieve_implementation_string = Dovecot Pigeonhole
 ? managesieve_max_line_length = 65536
}




#Addition ssl config
!include sni.conf

with sni cert support (examples)

# cat sni.conf
#sni.conf
ssl = yes
verbose_ssl = yes
ssl_dh =</usr/local/etc/dovecot/dh-4096.pem
ssl_prefer_server_ciphers = yes
#ssl_min_protocol = TLSv1.2

#Default *.scom.ca
ssl_key =</usr/local/etc/dovecot/scom.pem
ssl_cert =</usr/local/etc/dovecot/scom.pem
ssl_ca =</usr/local/etc/dovecot/scom.pem

local_name .scom.ca {
ssl_key =</usr/local/etc/dovecot/scom.pem
ssl_cert =</usr/local/etc/dovecot/scom.pem
ssl_ca =</usr/local/etc/dovecot/scom.pem

}

local_name mail.clancyca.com {
 ? ssl_key =</usr/local/etc/dovecot/cert/mail.clancyca.com
 ? ssl_cert =</usr/local/etc/dovecot/cert/mail.clancyca.com
 ? ssl_ca =</usr/local/etc/dovecot/cert/mail.clancyca.com
}

local_name mail.paulkudla.net {
 ? ssl_key =</usr/local/etc/dovecot/cert/mail.paulkudla.net
 ? ssl_cert =</usr/local/etc/dovecot/cert/mail.paulkudla.net
 ? ssl_ca =</usr/local/etc/dovecot/cert/mail.paulkudla.net
}

local_name mail.ekst.ca {
 ? ssl_key =</usr/local/etc/dovecot/cert/mail.ekst.ca
 ? ssl_cert =</usr/local/etc/dovecot/cert/mail.ekst.ca
 ? ssl_ca =</usr/local/etc/dovecot/cert/mail.ekst.ca
}

local_name mail.hamletdevelopments.ca {
 ? ssl_key =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca
 ? ssl_cert =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca
 ? ssl_ca =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca
}

pg sql support supporting replication

# cat dovecot-pgsql.conf
driver = pgsql
connect = host=localhost port=5433 dbname=scom_billing user=pgsql
passworddefault_pass_scheme = PLAIN

password_query = SELECT username as user, password FROM email_users 
WHERE username = '%u' and password <> 'alias' and status =
True and
destination = '%u'

user_query = SELECT home, uid, gid FROM email_users WHERE username = 
'%u' and password <> 'alias' and status = True and
destination = '%u'

#iterate_query = SELECT user, password FROM email_users WHERE username = 
'%u' and password <> 'alias' and status = True and
destination = '%u'

iterate_query = SELECT "username" as user, domain FROM email_users
WHERE
status = True and alias_flag = False




Happy Friday !!!
Thanks - paul

Paul Kudla


Scom.ca Internet Services <http://www.scom.ca>
004-1009 Byron Street South
Whitby, Ontario - Canada
L1N 4S3

Toronto 416.642.7266
Main?1.866.411.7266
Fax?1.888.892.7266
Email paul at scom.ca
On 1/5/2023 8:56 PM, Gerben Wierda wrote:
> One step further in my quest to create a replacement mail server.
>
> I now have my old mail server (2.3.19.1, macOS + MacPorts) and my new 
> (2.3.20, Alpine Linux, Docker, apk package). When I turn on 
> replication it works, but, after a while I see:
>
> Jan 06 00:50:31 replicator: Panic: data stack: Out of memory when 
> allocating 268435496 bytes
> Jan 06 00:50:32 replicator: Fatal: master: service(replicator): child 
> 133 killed with signal 6 (core dumped)
> Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: replication(sysbh): 
> Sync failure:
> Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: replication(sysbh): 
> Remote sent invalid input: -
>
> I've removed synchronous operation for now (found a message on the net 
> suggesting that) but is this known and what does it mean?
>
> Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>)
> R&A IT Strategy <https://ea.rna.nl/>?(main site)
> Book: Chess and the Art of Enterprise?Architecture 
> <https://ea.rna.nl/the-book/>
> Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/>
>
>
> -- 
> This message has been scanned for viruses and
> dangerous content by *MailScanner* <http://www.mailscanner.info/>,
and is
> believed to be clean. 
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