Server Error 500 on every Ajax Call

Question

we have a problem that we get a internal server error on about every ajax call. The example below happens when editing a view clicking "add filter" and directly click on abort. It also happens when making changes to a view. At first glance the change seemed to be ignored but after refreshing the pages the changes will be visible.

When accessing the URL which throws the error we get a valid json string (checked with jsonlint.com).

Our server logs sadly show nothing interesting. I would appreciate any kind of hint where to look for a solution.

Edit: The nojs version seems to work fine but that's no solution in the long term :/

Answer 1

Look at your PHP error log. It should give you the file and line number it's having an issue with.

If you can, copy and paste the last few lines of the error log on here for us to look at.

Answer 2

When I have something like this it has always to do with the .htaccess file. Or maybe you just haven't enabled clean url's or something like that.

EDIT Is there somthing like this in your htaccess file

 RewriteEngine on
   RewriteBase /
   RewriteCond %{REQUEST_FILENAME} !-f
   RewriteCond %{REQUEST_FILENAME} !-d
   RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]

Make sure it's uncommented

Answer 3

Create a separate page using hook_menu and write the same logic on the page where you are hitting. Also pass the arguments if any, if the newly created page is working fine then just replace that page with this newly created page.