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Old 05-27-2014, 07:14 AM   #1
Registered: Aug 2006
Posts: 609

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HTTP/1.0 500 Intenal Server Error

Hi all,

I'm setting up nagios and one of the standard checks for localhost is HTTP.

However this monitor goes into alert.
When I use check_http I get a 500 error.
Same if I use wget http://localhost
When I go from my browser to http://hostip I get an empty page (no error, however index.html content is not shown, neither in the page source). When I use http://hostip/index.html I do get the content.

IIRC the config of httpd.conf is close to default so I don't understand what is missing here.
The Directory is /var/www/html and this allows all.

DirectoryIndex is set as index.html and index.html is an empty page.

Same happens when using the IP on the host itself.

[root@server ~]# /usr/lib64/nagios/plugins/check_http -I localhost -f follow -v
GET / HTTP/1.0
User-Agent: check_http/v1.4.16 (nagios-plugins 1.4.16)
Connection: close

http://localhost:80/ is 211 characters
STATUS: HTTP/1.0 500 Internal Server Error
**** HEADER ****
Date: Tue, 27 May 2014 11:11:44 GMT
Server: Apache/2.2.15 (Red Hat)
X-Powered-By: PHP/5.3.3
Content-Length: 0
Connection: close
Content-Type: text/html; charset=UTF-8
**** CONTENT ****

HTTP CRITICAL: HTTP/1.0 500 Internal Server Error - 211 bytes in 0.001 second response time |time=0.001312s;;;0.000000 size=211B;;;0
317 <Directory "/var/www/html">
 319 #
 320 # Possible values for the Options directive are "None", "All",
 321 # or any combination of:
 322 #   Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
 323 #
 324 # Note that "MultiViews" must be named *explicitly* --- "Options All"
 325 # doesn't give it to you.
 326 #
 327 # The Options directive is both complicated and important.  Please see
 328 #
 329 # for more information.
 330 #
 331     Options Indexes FollowSymLinks
 333 #
 334 # AllowOverride controls what directives may be placed in .htaccess files.
 335 # It can be "All", "None", or any combination of the keywords:
 336 #   Options FileInfo AuthConfig Limit
 337 #
 338     AllowOverride None
 340 #
 341 # Controls who can get stuff from this server.
 342 #
 343     Order allow,deny
 344     Allow from all
 346 </Directory>
Could anyone shed a light on what's wrong here?
Old 05-27-2014, 07:55 AM   #2
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Check the apache error_log to find the reason of the 500 error

Old 05-27-2014, 08:04 AM   #3
Registered: Aug 2006
Posts: 609

Original Poster
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Originally Posted by bathory View Post

Check the apache error_log to find the reason of the 500 error

There was no error there. Only the 500 error itself:
"GET / HTTP/1.0" 500 - "-" "check_http/v1.4.16 (nagios-plugins 1.4.16)"
There was both a index.html and an index.php in the top level directory of the webroot.

I know error 500 is normally an application error. So I looked into /var/log/php.log however it was empty (I configured it before to use that file).
In the end I looked into /var/log/messages and there I found an error produced by the index.php script. I moved it away and tadaaa: issue solved

Just a usual case of looking into something,eventually deciding to post about it and 2 minutes later find out what is wrong

Thanks anyway!


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