Php .htaccess导致网站每隔一段时间显示500个内部错误

大家好，我的网站有时运行良好，但有时会显示500个内部服务器错误。当我刷新它时，它会显示正确的内容。删除.htaccess文件后，效果良好。下面是我的.htaccess文件，有人能告诉我它是否包含任何可能提示内部服务器错误的错误吗

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^videos/([0-9]+)/p/([0-9]+)/s/([0-9]+)/(.*)html$ videos/funny/index.php?vid=$1&p=$2&s=$3 [L]
RewriteRule ^forum/([0-9]+)/p/([0-9]+)/(.*).html$ business/each-news.php?tid=$1&p=$2 [L]
RewriteRule ^forums/([0-9]+)/p/([0-9]+)/s/([0-9]+)/(.*)html$ business/index.php?fid=$1&p=$2&s=$3 [L]
RewriteRule ^musics/([0-9]+)/p/([0-9]+)/s/([0-9]+)/(.*)html$ music/hip-hop/index.php?mid=$1&p=$2&s=$3 [L]
RewriteRule ^music/([0-9]+)/p/([0-9]+)/(.*).html$ music/hip-hop/music-each.php?jid=$1&p=$2 [L]
RewriteRule ^video/([0-9]+)/p/([0-9]+)/(.*).html$ videos/funny/video_each.php?jid=$1&p=$2 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ username/index.php?username=$1 [L]

---

什么是“一些间隔”？偶尔？您没有检查问题是否发生在特定的URI上吗？错误主要发生在我单击重写的链接时