dsync replication fails with No space left on device / Out of memory
Jörg Faudin Schulz
js at faudin.de
Fri Jul 2 08:43:15 EEST 2021
Hi,
the memory issue has already been reported, not resolved yet:
https://www.mail-archive.com/dovecot@dovecot.org/msg83763.html
the disk-free issue is something different. Increasing memory parameters
doesn't help- the sync only crashes later.
Here, everything seems to be synced fine nevertheless.
Am 02.07.21 um 02:56 schrieb Harlan Stenn:
> Inodes? df -i
>
> On 7/1/2021 5:07 PM, Steven Varco wrote:
>> Hi All
>>
>> Since I configured dsync replication I get strange errors in the maillog on my two mail dovecot nodes:
>>
>> PRIMARY:
>> Jul 2 01:21:42 mx01.example.com dovecot: doveadm: Error: read(mx02.example.com) failed: read(size=3148) failed: Connection reset by peer (last sent=mail, last recv=mail (EOL))
>>
>>
>> The secondary is more interesting:
>>
>> SECONDARY
>> Jul 2 01:21:42 mx02 dovecot: doveadm: Error: close(-1[istream-seekable.c:237]) failed: No space left on device
>> Jul 2 01:21:43 mx02 dovecot: doveadm: Fatal: pool_system_realloc(268435456): Out of memory
>> Jul 2 01:21:43 mx02 dovecot: doveadm: Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xa192e) [0x7f2e9be4c92e] -> /usr/lib64/dovecot/libdovecot.so.0(+0xa1a0e) [0x7f2e9be4ca0e] -> /usr/lib64/dovecot/libdovecot.so.0(i_error+0) [0x7f2e9bddc3d3] -> /usr/lib64/dovecot/libdo
>> Jul 2 01:21:43 mx02 dovecot: doveadm: Fatal: master: service(doveadm): child 2876 returned error 83 (Out of memory (service doveadm { vsz_limit=256 MB }, you may need to increase it) - set CORE_OUTOFMEM=1 environment to get core dump)
>> Jul 2 01:21:51 mx02 dovecot: dsync-local(user at example.com): Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xa192e) [0x7fd56e17e92e] -> /usr/lib64/dovecot/libdovecot.so.0(+0xa1a0e) [0x7fd56e17ea0e] -> /usr/lib64/dovecot/libdovecot.so.0(i_error+0) [0x7fd56e10e3d3] -> /us
>> Jul 2 01:21:51 mx02 dovecot: dsync-local(user at example.com): Fatal: master: service(doveadm): child 2882 returned error 83 (Out of memory (service doveadm { vsz_limit=256 MB }, you may need to increase it) - set CORE_OUTOFMEM=1 environment to get core dump)
>>
>>
>> The error messages state that disk space and/or memory is a problem, but disk space and memory is enough available:
>>
>> mx02 [~] # df -h /srv/mail/
>> Filesystem Size Used Avail Use% Mounted on
>> /dev/mapper/system-mail 10G 5.7G 4.3G 58% /srv/mail
>>
>> mx02 [~] # free -m
>> total used free shared buff/cache available
>> Mem: 3789 1602 1088 199 1097 1759
>> Swap: 471 93 378
>>
>>
>> I also tried to increase vsz_limit from 256 MB to 512 MB, which did not help.
>>
>>
>> And for the sake of completness also the connection to the doveadm port works well from both nodes:
>>
>> mx01-prod [~] # telnet mx02 14310
>> Trying 172.20.19.225...
>> Connected to mx02.
>> Escape character is '^]'.
>> ^]
>>
>>
>> mx02 [~] # telnet mx01 14310
>> Trying 172.20.19.251...
>> Connected to mx01.
>> Escape character is '^]'.
>> ^]
>>
>>
>> Although mail replication seems to be working properly and mails are in sync on both nodes (as what I could see), I would like to find the cause of this messages, as this does definetely don’t look normal…
>>
>> I’m grateful for any help, since I’m quite on a struggle now…
>>
>> Steven
>>
>>
>> Here’s my config
>> --------------------------------------------------------------------------------
>> # doveconf -n
>> # 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf
>> # Pigeonhole version 0.4.24 (124e06aa)
>> # OS: Linux 3.10.0-1160.31.1.el7.x86_64 x86_64 CentOS Linux release 7.9.2009 (Core)
>> # Hostname: mx01.example.com
>> auth_mechanisms = plain login
>> auth_verbose = yes
>> dict {
>> sqlquota = mysql:/etc/dovecot/dict-sqlquota.conf.ext
>> }
>> doveadm_password = # hidden, use -P to show it
>> doveadm_port = 14310
>> first_valid_uid = 1000
>> mail_plugins = quota notify replication
>> 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
>> mbox_write_locks = fcntl
>> 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
>> }
>> passdb {
>> args = /etc/dovecot/dovecot-sql.conf.ext
>> driver = sql
>> }
>> plugin {
>> mail_replica = tcp:mx02.example.com
>> quota = maildir:User quota
>> quota_exceeded_message = Quota exceeded, please go to http://www.example.com/over_quota_help for instructions on how to fix this.
>> quota_rule2 = INBOX.Trash:storage=+100M
>> quota_status_nouser = DUNNO
>> quota_status_overquota = 552 5.2.2 Mailbox is full / Mailbox ist voll
>> quota_status_success = DUNNO
>> quota_warning = storage=90%% quota-warning 90 %u
>> quota_warning2 = -storage=90%% quota-warning below %u
>> sieve = file:~/sieve;active=~/.dovecot.sieve
>> }
>> postmaster_address = postmaster at example.com
>> protocols = imap pop3 lmtp sieve
>> replication_dsync_parameters = -d -l 30 -U
>> service aggregator {
>> fifo_listener replication-notify-fifo {
>> user = vmail
>> }
>> unix_listener replication-notify {
>> user = vmail
>> }
>> }
>> service auth {
>> unix_listener /var/spool/postfix/private/auth {
>> group = postfix
>> mode = 0660
>> user = postfix
>> }
>> unix_listener auth-userdb {
>> user = vmail
>> }
>> }
>> service dict {
>> unix_listener dict {
>> user = vmail
>> }
>> }
>> service doveadm {
>> inet_listener {
>> port = 14310
>> ssl = no
>> }
>> }
>> service managesieve-login {
>> inet_listener sieve {
>> port = 4190
>> }
>> }
>> service quota-status {
>> client_limit = 1
>> executable = quota-status -p postfix
>> inet_listener {
>> port = 14340
>> }
>> }
>> service quota-warning {
>> executable = script /usr/local/libexec/dovecot/quota-warning.sh
>> unix_listener quota-warning {
>> user = vmail
>> }
>> user = vmail
>> }
>> service replicator {
>> process_min_avail = 1
>> unix_listener replicator-doveadm {
>> mode = 0600
>> user = vmail
>> }
>> }
>> ssl = required
>> ssl_cert = </etc/ssl/acme/certs/mail.example.com.chain.crt
>> ssl_key = # hidden, use -P to show it
>> userdb {
>> args = /etc/dovecot/dovecot-sql.conf.ext
>> driver = sql
>> }
>> verbose_proctitle = yes
>> protocol lmtp {
>> mail_plugins = quota notify replication sieve
>> }
>> protocol lda {
>> mail_plugins = quota notify replication sieve
>> }
>> protocol imap {
>> mail_max_userip_connections = 20
>> mail_plugins = quota notify replication imap_quota
>> }
>> --------------------------------------------------------------------------------
>>
>>
>> mx02.example.com has exact the same config, except of:
>> --------------------------------------------------------------------------------
>> plugin {
>> mail_replica = tcp:mx01.example.com
>> --------------------------------------------------------------------------------
>>
>>
>> —
>> https://steven.varco.ch/
>> https://www.tech-island.com/
>>
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