[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
DELETE FROM b_composite_page WHERE ID IN (21334328,21334329,21334330,21334331,21334332,21334333,21334334,21334335,21334336,21334337,21334338,21334339,21334340,21334341,21334342,21334343,21334344,21334345,21334346,21334347,21334348,21334349,21334350,21334351,21334352,21334353,21334354,21334355,21334356,21334357,21334358,21334359,21334360,21334361,21334362,21334363,21334364,21334365,21334366,21334367,21334368,21334369,21334370,21334371,21334372,21334373,21334374,21334375,21334376,21334377,21334378,21334379,21334380,21334381,21334382,21334383,21334384,21334385,21334386,21334387,21334388,21334389,21334390,21334391,21334392,21334393,21334394,21334395,21334396,21334397,21334398,21334399,21334400,21334401,21334402,21334403,21334404,21334405,21334406,21334407,21334408,21334409,21334410,21334411,21334412,21334413,21334414,21334415,21334416,21334417,21334418,21334419,21334420,21334421,21334422,21334423,21334424,21334425,21334426,21334427)
/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string, NULL)
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/lib/db/connection.php:379
#2: Bitrix\Main\DB\Connection->queryExecute(string)
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/lib/composite/internals/model/page.php:186
#3: Bitrix\Main\Composite\Internals\Model\PageTable::deleteBatch(array)
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/lib/composite/engine.php:834
#4: Bitrix\Main\Composite\Engine::ensureFileQuota(integer)
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/lib/composite/engine.php:483
#5: Bitrix\Main\Composite\Engine::processPageContent(string)
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/lib/composite/engine.php:420
#6: Bitrix\Main\Composite\Engine::endBuffering(string, string)
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/classes/general/main.php:3194
#7: CAllMain->EndBufferContent(string)
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/classes/general/main.php:3138
#8: CAllMain->EndBufferContentMan()
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/include/epilog_after.php:36
#9: require(string)
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/include/epilog.php:3
#10: require_once(string)
	/home/bitrix/ext_www/bookbars.ru/bitrix/footer.php:4
#11: require(string)
	/home/bitrix/ext_www/bookbars.ru/catalog/index.php:333
#12: include_once(string)
	/home/bitrix/ext_www/bookbars.ru/bitrix/modules/main/include/urlrewrite.php:159
#13: include_once(string)
	/home/bitrix/ext_www/bookbars.ru/bitrix/urlrewrite.php:2