500 error when accessing Nagios API

[andrewatmacys]

Version of Nagios is 5.4.13 on RHEL 7

When attempting to get host status, I'm getting a 500 error from the Nagios API:

nagios API2_LI.jpg

nagiosAPI.png

It was working not very long ago, a few days ago to my knowledge, so I'm not sure what might be causing a 500 internal server error.

[andrewatmacys]

I should note that when searching individually for hosts it works but not for all hosts.

[tgriep]

If the server has a lot of Hosts, you may have to increase some settings for PHP and Apache so the system can process them and allow you to display the data.

Edit the /etc/php.ini file and change the following from

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max_execution_time = 30
max_input_time = 60
memory_limit = 128M

to

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max_execution_time = 120
max_input_time = 240
memory_limit = 1024M

add this to the bottom of that file

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max_input_vars=50000

Save the file

Then edit this file

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/etc/httpd/conf/httpd.conf

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add this to the bottom of that file
LimitRequestLine 100000

Save the file and restart Apache for the changes to take affect.

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service httpd restart

If the above variables have been changed already on the server to values larger than the examples, increase them further.

Let us know if this works.