[wp-trac] [WordPress Trac] #33524: json_encode giving invalid UTF-8 sequence followed by maxed CPU's

[WordPress Trac]

#33524: json_encode giving invalid UTF-8 sequence followed by maxed CPU's
-------------------------------+------------------
 Reporter:  thehrisworld       |       Owner:
     Type:  defect (bug)       |      Status:  new
 Priority:  normal             |   Milestone:
Component:  General            |     Version:
 Severity:  normal             |  Resolution:
 Keywords:  reporter-feedback  |     Focuses:
-------------------------------+------------------

Comment (by thehrisworld):

 Thanks, good to know -- since stepping back a version, our server has been
 maintaining 6-40% with occasional expected spikes.

 And looking at the logs, lo and behold the error notice is still there...
 harrumph for us! :-)

 Our httpd error_log since the last restart (19 hours ago from this
 post)...

 {{{
 [Mon Aug 24 02:21:11 2015] [error] [client 203.190.36.79] client sent
 HTTP/1.1 request without hostname (see RFC2616 section 14.23):
 /w00tw00t.at.ISC.SANS.DFind:)
 [Mon Aug 24 08:30:44 2015] [error] [client 173.245.56.161] PHP Warning:
 json_encode(): Invalid UTF-8 sequence in argument in /var/www/html/wp-
 includes/functions.php on line 2669
 [Mon Aug 24 08:30:45 2015] [error] [client 173.245.56.161] PHP Warning:
 json_encode(): Invalid UTF-8 sequence in argument in /var/www/html/wp-
 includes/functions.php on line 2669
 [Mon Aug 24 08:30:45 2015] [error] [client 173.245.56.161] PHP Warning:
 json_encode(): Invalid UTF-8 sequence in argument in /var/www/html/wp-
 includes/functions.php on line 2669
 [Mon Aug 24 11:56:25 2015] [error] [client 173.245.56.161] PHP Warning:
 json_encode(): Invalid UTF-8 sequence in argument in /var/www/html/wp-
 includes/functions.php on line 2669
 [Mon Aug 24 11:56:27 2015] [error] [client 173.245.56.161] PHP Warning:
 json_encode(): Invalid UTF-8 sequence in argument in /var/www/html/wp-
 includes/functions.php on line 2669
 [Mon Aug 24 13:56:55 2015] [error] [client 91.200.13.64] client denied by
 server configuration: /var/www/html/wp-content/plugins/hello.php, referer:
 http://54.84.79.85/
 [Mon Aug 24 13:56:55 2015] [error] [client 91.200.13.64] client denied by
 server configuration: /var/www/html/wp-content/218.php, referer:
 http://54.84.79.85/
 [Mon Aug 24 13:56:56 2015] [error] [client 91.200.13.64] client denied by
 server configuration: /var/www/html/wp-content/uploads/shwso.php, referer:
 http://54.84.79.85/
 [Mon Aug 24 15:00:26 2015] [error] [client 188.114.98.46] PHP Warning:
 json_encode(): Invalid UTF-8 sequence in argument in /var/www/html/wp-
 includes/functions.php on line 2669, referer: http://www.thehrisworld.com
 /wp-admin/
 [Mon Aug 24 15:00:43 2015] [error] [client 188.114.98.46] PHP Warning:
 json_encode(): Invalid UTF-8 sequence in argument in /var/www/html/wp-
 includes/functions.php on line 2669, referer: http://www.thehrisworld.com
 /wp-admin/plugins.php
 [root at ip-172-31-34-115 ~]#

 }}}

 [And now we have a new message concerning 91.200.13.64 which is iis.net --
 more homework....]


 Not mentioned originally: we have minimized the plugins and are activating
 only 3 an hour or so JUST to be sure they are not the culprits...

 Will advise as soon as anything else changes or is discovered...

--
Ticket URL: <https://core.trac.wordpress.org/ticket/33524#comment:2>
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