ホスティング サーバーの 1 つで joomla の下に Web サイトがあります。昨日まで正常に動作していました。しかし、昨日から Web サイトを開くと、次のエラーが表示されます。
500 - No valid database connection:MySQL server has gone away SQL=SELECT a.*, CASE WHEN CHAR_LENGTH(a.alias) THEN CONCAT_WS(":", a.id, a.alias) ELSE a.id END as slug, CASE WHEN CHAR_LENGTH(cc.alias) THEN CONCAT_WS(":", cc.id, cc.alias) ELSE cc.id END as catslug FROM jos_content AS a INNER JOIN jos_categories AS cc ON cc.id = a.catid INNER JOIN jos_sections AS s ON s.id = a.sectionid WHERE a.state = 1 AND ( a.publish_up = '0000-00-00 00:00:00' OR a.publish_up <= '2012-03-04 17:59:41' ) AND ( a.publish_down = '0000-00-00 00:00:00' OR a.publish_down >= '2012-03-04 17:59:41' ) AND s.id > 0 AND a.access <= 0 AND cc.access <= 0 AND s.access <= 0 AND s.published = 1 AND cc.published = 1 ORDER BY a.created DESC LIMIT 0, 5
または時々それはただ言う：
Internal Server Error.
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster@mysite.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
何が問題なのですか？それとも問題があるのはホストセンターですか？