Magento 2.1 Deploy static fails with session set a...

Mr P. · ‎11-14-2018

Hi.

I've got a problem with a Magento 2.1 when deploying static files.

If the session is set to files, no problem. But when it's set to db, it crashes in the middle of deployment with a PDO error:

PHP Fatal error: Uncaught Exception: Warning: PDOStatement::execute(): MySQL server has gone away in /home/..../vendor/magento/zendframework1/library/Zend/Db/Statement/Pdo.php

It seems that around 30s after the last request, Magento touch something in the session DB, and that it creates this error.

The Web and the DB are on different servers.

Here is the queries that are sent to MySQL

181114 16:09:05     85 Connect   master-bdd@172.0.0.1 as anonymous on magentobase
           85 Query SET SQL_MODE=''
           85 Query SET time_zone = '+00:00'
           85 Query SET NAMES utf8
           85 Query SHOW INDEX FROM `cms_block`
           85 Query SELECT `cms_block`.`block_id` FROM `cms_block` WHERE (`cms_block`.`identifier`='ctk_head_texte') LIMIT 1
           85 Query SELECT `t`.* FROM `cms_block` AS `t` WHERE (block_id = '143')
           85 Query SELECT `cbs`.`store_id` FROM `cms_block_store` AS `cbs`
 INNER JOIN `cms_block` AS `cb` ON cbs.block_id = cb.block_id WHERE (cb.block_id = '143')
           85 Query SELECT `main_table`.* FROM `store_website` AS `main_table` ORDER BY main_table.sort_order ASC, main_table.name ASC
           85 Query SELECT `main_table`.* FROM `store` AS `main_table` ORDER BY CASE WHEN main_table.store_id = 0 THEN 0 ELSE 1 END ASC, main_table.sort_order ASC, main_table.name ASC
           85 Query SELECT `store_group`.* FROM `store_group` WHERE (`store_group`.`group_id`='1')
           85 Query SELECT `main_table`.* FROM `core_config_data` AS `main_table`
           85 Query SELECT `store`.* FROM `store`
           85 Query SELECT `store_website`.* FROM `store_website`
           85 Query SELECT `main_table`.* FROM `eav_entity_type` AS `main_table`
           85 Query SHOW INDEX FROM `catalog_product_entity`
           85 Query SHOW TABLE STATUS LIKE 'session'
           85 Query SELECT `session`.`session_data` FROM `session` WHERE (session_id = '*****')
           85 Query SHOW INDEX FROM `customer_entity`
181114 16:09:06    86 Connect   master-bdd@172.0.0.1 as anonymous on magentobase
           86 Query SET SQL_MODE=''
           86 Query SET time_zone = '+00:00'
           86 Query SET NAMES utf8
           86 Query SELECT `main_table`.* FROM `theme` AS `main_table` WHERE (`area` = 'adminhtml') AND (`theme_path` = 'Magento/backend')
           87 Connect   master-bdd@172.0.0.1 as anonymous on magentobase
           87 Query SET SQL_MODE=''
           87 Query SET time_zone = '+00:00'
           87 Query SET NAMES utf8
           87 Query SELECT `main_table`.* FROM `theme` AS `main_table` WHERE (`area` = 'frontend') AND (`theme_path` = 'Sm/himarket')
           88 Connect   master-bdd@172.0.0.1 as anonymous on magentobase
           89 Connect   master-bdd@172.0.0.1 as anonymous on magentobase
           88 Query SET SQL_MODE=''
           87 Query SELECT `theme`.* FROM `theme` WHERE (`theme`.`theme_id`='1')
           89 Query SET SQL_MODE=''
           88 Query SET time_zone = '+00:00'
           89 Query SET time_zone = '+00:00'
           88 Query SET NAMES utf8
           89 Query SET NAMES utf8
           88 Query SELECT `main_table`.* FROM `theme` AS `main_table` WHERE (`area` = 'frontend') AND (`theme_path` = 'Magento/luma')
           89 Query SELECT `main_table`.* FROM `theme` AS `main_table` WHERE (`area` = 'frontend') AND (`theme_path` = 'Magento/blank')
           88 Query SELECT `theme`.* FROM `theme` WHERE (`theme`.`theme_id`='1')
181114 16:09:35    85 Query SELECT `session`.* FROM `session` WHERE (session_id = '45j8741k0gcnqkjpn14j69gcl3')
           85 Query INSERT INTO `session` (`session_expires`, `session_data`, `session_id`) VALUES ('***', '****')
           85 Quit  
           89 Quit  
           88 Quit  
181114 16:09:37    86 Quit  
181114 16:09:38    87 Quit

(removed irrelevant queries and private values)

Here are differents config files for MySQL I tried :

# MariaDB database server configuration file.
#
# You can copy this file to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port            = 3306
socket          = /var/run/mysqld/mysqld.sock

# Here is entries for some specific programs
# The following values assume you have at least 32M ram

# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket          = /var/run/mysqld/mysqld.sock
nice            = 0

[mysqld]
#
# * Basic Settings
#
user            = mysql
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
port            = 3306
basedir         = /usr
datadir         = /var/lib/mysql
tmpdir          = /tmp
lc_messages_dir = /usr/share/mysql
lc_messages     = en_US
skip-external-locking
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
;bind-address           = 127.0.0.1
#
# * Fine Tuning
#
max_connections         = 100
connect_timeout         = 5
wait_timeout            = 600
max_allowed_packet      = 16M
thread_cache_size       = 128
sort_buffer_size        = 4M
bulk_insert_buffer_size = 16M
tmp_table_size          = 32M
max_heap_table_size     = 32M
#
# * MyISAM
#
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched. On error, make copy and try a repair.
myisam_recover          = BACKUP
key_buffer_size         = 128M
#open-files-limit       = 2000
table_open_cache        = 400
myisam_sort_buffer_size = 512M
concurrent_insert       = 2
read_buffer_size        = 2M
read_rnd_buffer_size    = 1M
#
# * Query Cache Configuration
#
# Cache only tiny result sets, so we can fit more in the query cache.
query_cache_limit               = 128K
query_cache_size                = 64M
# for more write intensive setups, set to DEMAND or OFF
#query_cache_type               = DEMAND
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file        = /var/log/mysql/mysql.log
#general_log             = 1
#
# Error logging goes to syslog due to /etc/mysql/conf.d/mysqld_safe_syslog.cnf.
#
# we do want to know about network errors and such
log_warnings            = 2
#
# Enable the slow query log to see queries with especially long duration
#slow_query_log[={0|1}]
slow_query_log_file     = /var/log/mysql/mariadb-slow.log
long_query_time = 10
#log_slow_rate_limit    = 1000
log_slow_verbosity      = query_plan

#log-queries-not-using-indexes
#log_slow_admin_statements
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
#       other settings you may need to change.
#server-id              = 1
#report_host            = master1
#auto_increment_increment = 2
#auto_increment_offset  = 1
log_bin                 = /var/log/mysql/mariadb-bin
log_bin_index           = /var/log/mysql/mariadb-bin.index
# not fab for performance, but safer
#sync_binlog            = 1
expire_logs_days        = 10
max_binlog_size         = 100M
# slaves
#relay_log              = /var/log/mysql/relay-bin
#relay_log_index        = /var/log/mysql/relay-bin.index
#relay_log_info_file    = /var/log/mysql/relay-bin.info
#log_slave_updates
#read_only
#
# If applications support it, this stricter sql_mode prevents some
# mistakes like inserting invalid dates etc.
#sql_mode               = NO_ENGINE_SUBSTITUTION,TRADITIONAL
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
default_storage_engine  = InnoDB
# you can't just change log file size, requires special procedure
#innodb_log_file_size   = 50M
innodb_buffer_pool_size = 256M
innodb_log_buffer_size  = 8M
innodb_file_per_table   = 1
innodb_open_files       = 400
innodb_io_capacity      = 400
innodb_flush_method     = O_DIRECT
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem

#
# * Galera-related settings
#
[galera]
# Mandatory settings
#wsrep_provider=
#wsrep_cluster_address=
#wsrep_slave_threads=1
#binlog_format=row
#default_storage_engine=InnoDB
#innodb_autoinc_lock_mode=2
#bind-address=0.0.0.0
#
# Optional setting
#innodb_flush_log_at_trx_commit=0

[mysqldump]
quick
quote-names
max_allowed_packet      = 16M

[mysql]
#no-auto-rehash # faster start of mysql but no tab completition

[isamchk]
key_buffer              = 16M

or

# MariaDB database server configuration file.
#
# You can copy this file to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
# 
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port		= 3306
socket		= /var/run/mysqld/mysqld.sock

# Here is entries for some specific programs
# The following values assume you have at least 32M ram

# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket		= /var/run/mysqld/mysqld.sock
nice		= 0

[mysqld]

net_read_timeout = 600
net_write_timeout = 600
#
# * Basic Settings
#
user		= mysql
pid-file	= /var/run/mysqld/mysqld.pid
socket		= /var/run/mysqld/mysqld.sock
port		= 3306
basedir		= /usr
datadir		= /var/lib/mysql
tmpdir		= /tmp
lc_messages_dir	= /usr/share/mysql
lc_messages	= en_US
skip-external-locking
skip-name-resolve
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
#bind-address		= 172.0.0.2
#
# * Fine Tuning
#
max_connections		= 100
connect_timeout		= 1200
wait_timeout		= 600
max_allowed_packet	= 512M
thread_cache_size       = 128
sort_buffer_size	= 4M
bulk_insert_buffer_size	= 16M
tmp_table_size		= 16M
max_heap_table_size	= 16M

#
# * MyISAM
#
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched. On error, make copy and try a repair.
myisam_recover_options = BACKUP
key_buffer_size		= 128M
#open-files-limit	= 2000
table_open_cache	= 400
myisam_sort_buffer_size	= 512M
concurrent_insert	= 2
read_buffer_size	= 2M
read_rnd_buffer_size	= 1M
#
# * Query Cache Configuration
#
# Cache only tiny result sets, so we can fit more in the query cache.
query_cache_limit		= 128K
query_cache_size		= 64M
# for more write intensive setups, set to DEMAND or OFF
#query_cache_type		= DEMAND
#query_cache_type		= 0
#join_buffer_size = 1M # MySQL tuner
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
general_log_file        = /var/log/mysql/mysql.log
general_log             = 1
#
# Error logging goes to syslog due to /etc/mysql/conf.d/mysqld_safe_syslog.cnf.
#
# we do want to know about network errors and such
log_warnings		= 2
#
# Enable the slow query log to see queries with especially long duration
#slow_query_log[={0|1}]
slow_query_log		= 3
slow_query_log_file	= /var/log/mysql/mariadb-slow.log
long_query_time = 1
#log_slow_rate_limit	= 1000
log_slow_verbosity	= query_plan

#log-queries-not-using-indexes
#log_slow_admin_statements
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
#       other settings you may need to change.
#server-id		= 1
#report_host		= master1
#auto_increment_increment = 2
#auto_increment_offset	= 1
#log_bin			= /var/log/mysql/mariadb-bin
#log_bin_index		= /var/log/mysql/mariadb-bin.index
# not fab for performance, but safer
#sync_binlog		= 1
expire_logs_days	= 5
max_binlog_size         = 10M
# slaves
#relay_log		= /var/log/mysql/relay-bin
#relay_log_index	= /var/log/mysql/relay-bin.index
#relay_log_info_file	= /var/log/mysql/relay-bin.info
#log_slave_updates
#read_only
#
# If applications support it, this stricter sql_mode prevents some
# mistakes like inserting invalid dates etc.
#sql_mode		= NO_ENGINE_SUBSTITUTION,TRADITIONAL
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
default_storage_engine	= InnoDB
# you can't just change log file size, requires special procedure
#innodb_log_file_size	= 50M
innodb_buffer_pool_size	= 256M
innodb_log_buffer_size	= 8M
innodb_file_per_table	= 0
innodb_open_files	= 400
innodb_io_capacity	= 400
innodb_flush_method	= O_DIRECT
innodb_buffer_pool_instances = 1

[mysqldump]
quick
quote-names
max_allowed_packet	= 16M #512M

[mysql]
#no-auto-rehash	# faster start of mysql but no tab completion

[isamchk]
key_buffer		= 16M

Setting session in another mode than DB is not possible at the moment.

If you have any idea, please share !

Mr P.

Magento 2.1 Deploy static fails with session set at DB

Magento 2.1 Deploy static fails with session set at DB