Topic: dovecot: imap | Fatal: pool_system_malloc: Out of memory
==== Required information ====
- iRedMail version (check /etc/iredmail-release): v0.9.7
- Linux/BSD distribution name and version: CentOS 7.3 64-Bit
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====
Hi,
I got "Warning: fscking index file" today as below:
===========================
Nov 20 15:57:08 ns1-srv dovecot: imap(support@xx.xx): Warning: fscking index file /var/vmail/vmail1/xx.xx/s/u/p/support-2017.10.04.14.04.32//Maildir/dovecot.index
===========================
After I remove all dovecot.index* file under the folder, I got:
===========================
Nov 20 15:57:25 ns1-srv dovecot: imap(support@xx.xx): Fatal: pool_system_malloc(197016): Out of memory
Nov 20 15:57:25 ns1-srv dovecot: imap(support@xx.xx): Fatal: master: service(imap): child 30785 returned error 83 (Out of memory (service imap { vsz_limit=256 MB }, you may need to increase it) - set CORE_OUTOFMEM=1 environment to get core dump)
===========================
And here is my dovecot config:
===========================
# More details about Dovecot settings:
# - http://wiki2.dovecot.org/
# - http://wiki2.dovecot.org/Variables
# Listen addresses.
# - '*' means all available IPv4 addresses.
# - '[::]' means all available IPv6 addresses.
# Listen on all available addresses by default
listen = * [::]
#base_dir = /var/run/dovecot
mail_plugins = quota mailbox_alias acl mail_log notify
# Enabled mail protocols.
protocols = pop3 imap sieve lmtp
# User/group who owns the message files:
mail_uid = 2000
mail_gid = 2000
# Assign uid to virtual users.
first_valid_uid = 2000
last_valid_uid = 2000
# Logging. Reference: http://wiki2.dovecot.org/Logging
#
# Use syslog
syslog_facility = local5
# Log file path if we use internal log system
#log_path = /var/log/dovecot/dovecot.log
# Debug
#mail_debug = yes
#auth_verbose = yes
#auth_debug = yes
#auth_debug_passwords = yes
# Possible values: no, plain, sha1.
#auth_verbose_passwords = no
# SSL: Global settings.
# Refer to wiki site for per protocol, ip, server name SSL settings:
# http://wiki2.dovecot.org/SSL/DovecotConfiguration
ssl_protocols = !SSLv2 !SSLv3
ssl = required
verbose_ssl = no
#ssl_ca = </path/to/ca
#ssl_cert = </etc/pki/tls/certs/iRedMail.crt
#ssl_key = </etc/pki/tls/private/iRedMail.key
ssl_cert = </etc/letsencrypt/live/mail.xx.xx/cert.pem
ssl_key = </etc/letsencrypt/live/mail.xx.xx/privkey.pem
ssl_ca = </etc/letsencrypt/live/mail.xx.xx/fullchain.pem
# Fix 'The Logjam Attack'
ssl_cipher_list = ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5
# Dovecot 2.2.6 or greater:
# Specify the wanted DH parameters length
ssl_dh_parameters_length = 2048
ssl_prefer_server_ciphers = yes
# With disable_plaintext_auth=yes AND ssl=required, STARTTLS is mandatory.
# Set disable_plaintext_auth=no AND ssl=yes to allow plain password transmitted
# insecurely.
disable_plaintext_auth = yes
# Allow plain text password per IP address/net
#remote 192.168.0.0/24 {
# disable_plaintext_auth = no
#}
# Mail location and mailbox format.
mail_location = maildir:%Lh/Maildir/:INDEX=%Lh/Maildir/
# Authentication related settings.
# Append this domain name if client gives empty realm.
#auth_default_realm = xx.xx
# Authentication mechanisms.
auth_mechanisms = PLAIN LOGIN
# Limits the number of users that can be logging in at the same time.
# Default is 100. This can be overridden by `process_limit =` in
# `service [protocol]` block.
# e.g.
# protocol imap-login {
# ...
# process_limit = 500
# }
#default_process_limit = 100
service auth {
unix_listener /var/spool/postfix/private/dovecot-auth {
user = postfix
group = postfix
mode = 0666
}
unix_listener auth-master {
user = vmail
group = vmail
mode = 0666
}
unix_listener auth-userdb {
user = vmail
group = vmail
mode = 0660
}
}
# LMTP server (Local Mail Transfer Protocol).
# Reference: http://wiki2.dovecot.org/LMTP
service lmtp {
user = vmail
# For higher volume sites, it may be desirable to increase the number of
# active listener processes. A range of 5 to 20 is probably good for most
# sites.
process_min_avail = 5
# Logging.
# Require 'log_path =' in 'protocol lmtp {}' block.
executable = lmtp -L
# Listening on socket file and TCP
unix_listener /var/spool/postfix/private/dovecot-lmtp {
user = postfix
group = postfix
mode = 0600
}
inet_listener lmtp {
# Listen on localhost (ipv4)
address = 127.0.0.1
port = 24
}
}
# Virtual mail accounts.
userdb {
args = /etc/dovecot/dovecot-mysql.conf
driver = sql
}
passdb {
args = /etc/dovecot/dovecot-mysql.conf
driver = sql
}
# Master user.
# Master users are able to log in as other users. It's also possible to
# directly log in as any user using a master password, although this isn't
# recommended.
# Reference: http://wiki2.dovecot.org/Authentication/MasterUsers
auth_master_user_separator = *
passdb {
driver = passwd-file
args = /etc/dovecot/dovecot-master-users
master = yes
}
plugin {
# Quota configuration.
# Reference: http://wiki2.dovecot.org/Quota/Configuration
quota = dict:user::proxy::quotadict
quota_rule = *:storage=1G
#quota_rule2 = *:messages=0
#quota_rule3 = Trash:storage=1G
#quota_rule4 = Junk:ignore
# Quota warning.
#
# If user suddenly receives a huge mail and the quota jumps from
# 85% to 95%, only the 95% script is executed.
#
# Only the command for the first exceeded limit is executed, so configure
# the highest limit first.
quota_warning = storage=100%% quota-warning 100 %u
quota_warning2 = storage=95%% quota-warning 95 %u
quota_warning3 = storage=90%% quota-warning 90 %u
quota_warning4 = storage=85%% quota-warning 85 %u
# allow user to become max 10% (or 50 MB) over quota
quota_grace = 10%%
#quota_grace = 50 M
# Custom Quota Exceeded Message.
# You can specify the message directly or read the message from a file.
#quota_exceeded_message = Quota exceeded, please try again later.
#quota_exceeded_message = </path/to/quota_exceeded_message.txt
# Plugin: expire.
#expire = Trash 7 Trash/* 7 Junk 30
#expire_dict = proxy::expire
# ACL and share folder
acl = vfile
acl_shared_dict = proxy::acl
# By default Dovecot doesn't allow using the IMAP "anyone" or
# "authenticated" identifier, because it would be an easy way to spam
# other users in the system. If you wish to allow it,
#acl_anyone = allow
# Pigeonhole managesieve service.
# Reference: http://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
# Per-user sieve settings.
sieve_dir = %Lh/sieve
sieve = %Lh/sieve/dovecot.sieve
# Global sieve settings.
sieve_global_dir = /var/vmail/sieve
# Note: if user has personal sieve script, global sieve rules defined in
# sieve_default will be ignored. Please use sieve_before or
# sieve_after instead.
#sieve_default =
sieve_before = /var/vmail/sieve/dovecot.sieve
#sieve_after =
# The maximum number of redirect actions that can be performed during a
# single script execution.
# The meaning of 0 differs based on your version. For pigeonhole-0.3.0 and
# beyond this means that redirect is prohibited. For older versions,
# however, this means that the number of redirects is unlimited.
sieve_max_redirects = 30
# Reference: http://wiki2.dovecot.org/Plugins/MailboxAlias
mailbox_alias_old = Sent
mailbox_alias_new = Sent Messages
mailbox_alias_old2 = Sent
mailbox_alias_new2 = Sent Items
# Events to log. `autoexpunge` is included in `expunge`
# Defined in https://github.com/dovecot/core/blob/ma … g-plugin.c
mail_log_events = delete undelete expunge mailbox_delete mailbox_rename
mail_log_fields = uid box msgid size from subject
}
service quota-warning {
executable = script /usr/local/bin/dovecot-quota-warning.sh
unix_listener quota-warning {
user = vmail
group = vmail
mode = 0660
}
}
service dict {
unix_listener dict {
mode = 0660
user = vmail
group = vmail
}
}
dict {
#expire = db:/var/lib/dovecot/expire/expire.db
quotadict = mysql:/etc/dovecot/dovecot-used-quota.conf
acl = mysql:/etc/dovecot/dovecot-share-folder.conf
}
protocol lda {
# Reference: http://wiki2.dovecot.org/LDA
mail_plugins = $mail_plugins sieve
lda_mailbox_autocreate = yes
lda_mailbox_autosubscribe = yes
postmaster_address = root
# Log file path if we use internal log system
#log_path = /var/log/dovecot/sieve.log
}
protocol lmtp {
# Log file path if we use internal log system
#log_path = /var/log/dovecot/lmtp.log
# Plugins
mail_plugins = quota sieve
postmaster_address = postmaster
# Address extension delivery
lmtp_save_to_detail_mailbox = yes
recipient_delimiter = +
}
protocol imap {
mail_plugins = $mail_plugins imap_quota imap_acl
imap_client_workarounds = tb-extra-mailbox-sep
# Maximum number of IMAP connections allowed for a user from each IP address.
# NOTE: The username is compared case-sensitively.
# Default is 10.
# Increase it to avoid issue like below:
# "Maximum number of concurrent IMAP connections exceeded"
mail_max_userip_connections = 30
}
protocol pop3 {
mail_plugins = $mail_plugins
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
pop3_uidl_format = %08Xu%08Xv
# Maximum number of IMAP connections allowed for a user from each IP address.
# NOTE: The username is compared case-sensitively.
# Default is 10.
mail_max_userip_connections = 30
# POP3 logout format string:
# %i - total number of bytes read from client
# %o - total number of bytes sent to client
# %t - number of TOP commands
# %p - number of bytes sent to client as a result of TOP command
# %r - number of RETR commands
# %b - number of bytes sent to client as a result of RETR command
# %d - number of deleted messages
# %m - number of messages (before deletion)
# %s - mailbox size in bytes (before deletion)
# Default format doesn't have 'in=%i, out=%o'.
#pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s, in=%i, out=%o
}
# Login processes. Refer to Dovecot wiki for more details:
# http://wiki2.dovecot.org/LoginProcess
service imap-login {
#inet_listener imap {
# port = 143
#}
#inet_listener imaps {
# port = 993
# ssl = yes
#}
service_count = 1
# To avoid startup latency for new client connections, set process_min_avail
# to higher than zero. That many idling processes are always kept around
# waiting for new connections.
#process_min_avail = 0
# number of simultaneous IMAP connections
process_limit = 500
# vsz_limit should be fine at its default 64MB value
#vsz_limit = 64M
}
service pop3-login {
#inet_listener pop3 {
# port = 110
#}
#inet_listener pop3s {
# port = 995
# ssl = yes
#}
service_count = 1
# number of simultaneous POP3 connections
#process_limit = 500
}
service managesieve-login {
inet_listener sieve {
# Listen on localhost (ipv4)
address = 127.0.0.1
port = 4190
}
}
namespace {
type = private
separator = /
prefix =
inbox = yes
# Refer to document for more details about alias mailbox:
# http://wiki2.dovecot.org/MailboxSettings
#
# Sent
mailbox Sent {
auto = subscribe
special_use = \Sent
}
mailbox "Sent Messages" {
auto = no
special_use = \Sent
}
mailbox "Sent Items" {
auto = no
special_use = \Sent
}
mailbox Drafts {
auto = subscribe
special_use = \Drafts
}
# Trash
mailbox Trash {
auto = subscribe
special_use = \Trash
}
mailbox "Deleted Messages" {
auto = no
special_use = \Trash
}
# Junk
mailbox Junk {
auto = subscribe
special_use = \Junk
}
mailbox Spam {
auto = no
special_use = \Junk
}
mailbox "Junk E-mail" {
auto = no
special_use = \Junk
}
# Archive
mailbox Archive {
auto = no
special_use = \Archive
}
mailbox Archives {
auto = no
special_use = \Archive
}
}
namespace {
type = shared
separator = /
prefix = Shared/%%u/
location = maildir:%%Lh/Maildir/:INDEX=%%Lh/Maildir/Shared/%%Ld/%%Ln
# this namespace should handle its own subscriptions or not.
subscriptions = yes
list = children
}
# Public mailboxes.
# Refer to Dovecot wiki page for more details:
# http://wiki2.dovecot.org/SharedMailboxes/Public
#namespace {
# type = public
# separator = /
# prefix = Public/
# location = maildir:/var/vmail/public:CONTROL=%Lh/Maildir/public:INDEXPVT=%Lh/Maildir/public
#
# # Allow users to subscribe to the public folders.
# subscriptions = yes
#}
!include_try /etc/dovecot/iredmail/*.conf
===========================
Many thanks.
----
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