"优雅重启"前，Lightsail服务器宕机了几个小时。

【以下的问题经过翻译处理】 连续两周，我接收到JetPack消息称我的网站已经宕机，在每天自动重启前数小时内（AH00493: SIGUSR1 received. Doing graceful restart）。我不确定该重启是否为自动重启或与宕机有 关。 错误日志每隔几秒钟出现与WP-Fastest Cache相关的连续错误，以下是一些错误日志信息：

最后几行错误信息

[Sun Mar 13 22:35:38.295213 2022] [proxy_fcgi:error] [pid 24517:tid xxx] [client xxxx] AH01071: Got error 'PHP message: PHP Warning: include_once(/bitnami/wordpress/wp-content/plugins/wp-super-cache/wp-cache-phase1.php): failed to open stream: No such file or directory in /bitnami/wordpress/wp-content/advanced-cache.php on line 22PHP message: PHP Warning: include_once(): Failed opening '/bitnami/wordpress/wp-content/plugins/wp-super-cache/wp-cache-phase1.php' for inclusion (include_path='.:/opt/bitnami/php/lib/php') in /bitnami/wordpress/wp-content/advanced-cache.php on line 22'

服务器宕机？

[Mon Mar 14 00:00:01.635219 2022] [mpm_event:notice] [pid xx:tid xxxx] AH00493: SIGUSR1 received. Doing graceful restart [Mon Mar 14 00:00:01.644021 2022] [mpm_event:notice] [pid xxx:tid xxxx] AH00489: Apache/2.4.52 (Unix) OpenSSL/1.1.1d configured -- resuming normal operations [Mon Mar 14 00:00:01.644034 2022] [core:notice] [pid xxx:tid xxx] AH00094: Command line: '/opt/bitnami/apache/bin/httpd -f /opt/bitnami/apache/conf/httpd.conf'

服务器重启后，错误依然存在：

[Mon Mar 14 00:00:32.243839 2022] [proxy_fcgi:error] [pid xx:tid xxx] [client xxx:46500] AH01071: Got error 'PHP message: PHP Warning: include_once(/bitnami/wordpress/wp-content/plugins/wp-super-cache/wp-cache-phase1.php): failed to open stream: No such file or directory in /bitnami/wordpress/wp-content/advanced-cache.php on line 22PHP message: PHP Warning: include_once(): Failed opening '/bitnami/wordpress/wp-content/plugins/wp-super-cache/wp-cache-phase1.php' for inclusion (include_path='.:/opt/bitnami/php/lib/php') in /bitnami/wordpress/wp-content/advanced-cache.php on line 22'