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I've just created an UptimeRobot account to monitor my website, but when it tries to access the page, it gets a 500 error.

63.143.42.242 - - [29/Nov/2016:08:33:11 +1100] "GET / HTTP/1.1" 500 2012 "http://www.mustangtech.com.au/" "Mozilla/5.0+(compatible; UptimeRobot/2.0; http://www.uptimerobot.com/)"


Any idea why that might be the case?

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Your website is currently down for me. Is it under attack? Else restart Apache and/or MariaDB/MySQL

Server specs (Server OS / Apache / MySQL / PHP / DragonflyCMS):
Fedora 25 / Apache 2.4.27 / MariaDB 10.1.26 / PHP 7.1.10 / Mercurial


It died trying to investigate this.
I had to rush off, so couldn't look into it any more, but when I tried to look at the Admin Security log, it basically used up all mysql time.
I ended up restarting mysql to fix it.

When I used a user agent changer in firefox and set it to "Mozilla/5.0+(compatible; UptimeRobot/2.0; www.uptimerobot.com/)", I also get the 500 error.

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After clearing the table {$PREFIX}_security_cache it looks like I'm no longer getting the 500 error.

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Do the security logs get cleaned up after a certain period, or do they just keep growing?

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security_cache does get cleaned up

Server specs (Server OS / Apache / MySQL / PHP / DragonflyCMS):
Fedora 25 / Apache 2.4.27 / MariaDB 10.1.26 / PHP 7.1.10 / Mercurial

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