[Bitrix\Main\DB\SqlQueryException]
Mysql query error: MySQL server has gone away (400)
SELECT
`security_session`.`SESSION_DATA` AS `SESSION_DATA`
FROM `b_sec_session` `security_session`
WHERE `security_session`.`SESSION_ID` = 'AYlcZVs6LSxRT71abLhCxpyWd4T0oxk2'
LIMIT 0, 1
/home/bitrix/www/bitrix/modules/main/lib/db/mysqlconnection.php:116
#0: Bitrix\Main\DB\MysqlConnection->queryInternal(string, array, NULL)
/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:329
#1: Bitrix\Main\DB\Connection->query(string)
/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:1769
#2: Bitrix\Main\Entity\Query->query(string)
/home/bitrix/www/bitrix/modules/main/lib/entity/query.php:454
#3: Bitrix\Main\Entity\Query->exec()
/home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php:242
#4: Bitrix\Main\Entity\DataManager::getList(array)
/home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php:171
#5: Bitrix\Main\Entity\DataManager::getRow(array)
/home/bitrix/www/bitrix/modules/security/classes/general/session_db.php:59
#6: CSecuritySessionDB::read(string)
#7: session_start()
/home/bitrix/www/bitrix/modules/main/include.php:286
#8: require_once(string)
/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#9: require_once(string)
/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#10: require_once(string)
/home/bitrix/www/bitrix/header.php:1
#11: require(string)
/home/bitrix/www/maker/index.php:3
#12: include_once(string)
/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#13: include_once(string)
/home/bitrix/www/bitrix/urlrewrite.php:2
Fatal error: Uncaught exception 'Bitrix\Main\DB\SqlQueryException' with message 'Mysql query error: MySQL server has gone away' in /home/bitrix/www/bitrix/modules/main/lib/db/mysqlconnection.php:116
Stack trace:
#0 /home/bitrix/www/bitrix/modules/main/lib/db/mysqlcommonconnection.php(132): Bitrix\Main\DB\MysqlConnection->queryInternal('SELECT * FROM `...')
#1 /home/bitrix/www/bitrix/modules/main/lib/db/connection.php(715): Bitrix\Main\DB\MysqlCommonConnection->getTableFields('b_sec_session')
#2 /home/bitrix/www/bitrix/modules/main/lib/db/sqlhelper.php(362): Bitrix\Main\DB\Connection->getTableField('b_sec_session', 'SESSION_ID')
#3 /home/bitrix/www/bitrix/modules/main/lib/entity/datamanager.php(815): Bitrix\Main\DB\SqlHelper->prepareAssignment('b_sec_session', 'SESSION_ID', 'AYlcZVs6LSxRT71...')
#4 /home/bitrix/www/bitrix/modules/security/classes/general/session_db.php(87): Bitrix\Main\Entity\DataManager::delete('AYlcZVs6LSxRT71...')
#5 [internal function]: CSecuritySessionDB::write('AYlcZVs6LSxRT71...', '')
#6 [internal f in /home/bitrix/www/bitrix/modules/main/lib/db/mysqlconnection.php on line 116