Wordpress After Update Whitepage 500 error

[Green Olive Tree]

All,

We have a client having issues after/during upgrading Wordpress Plugins/Themes.
Server info:
CloudLinux 7.4
CageFS setup with LS install
LiteSpeed 5.2.5

The issues that we are seeing, is when updating the plugins and themes, we get a White page after upgrading the plugins/themes.
Upgrades run without issue but once completed if you try clicking a link on the left or the back to Updates link at the bottom, a blank white page is displayed.
We enabled debugging in LiteSpeed we see the header sending a 500 error snippet: Wouldn't let me add the full log.

2018-03-21 08:59:42.994559 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] LsapiConn::doRead()
2018-03-21 08:59:42.994564 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] process packet header 8 bytes
2018-03-21 08:59:42.994568 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] process response header 180 bytes
2018-03-21 08:59:42.994572 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] Response Header: 'Status: 500 Internal Server Error'
2018-03-21 08:59:42.994577 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] Response Header: 'Expires: Wed, 11 Jan 1984 05:00:00 GMT'
2018-03-21 08:59:42.994580 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] Response Header: 'Cache-Control: no-cache, must-revalidate, max-age=0'
2018-03-21 08:59:42.994583 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] Response Header: 'Content-type: text/html; charset=UTF-8'
2018-03-21 08:59:42.994592 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] content type: [text/html], pMIME: 0x20d3910
2018-03-21 08:59:42.994595 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] response header finished!
2018-03-21 08:59:42.994601 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] process packet header 8 bytes
2018-03-21 08:59:42.994603 [DEBUG] [:46722#APVH_abcclinics.com:lsapi] [EXT] EndResponse( endCode=0, protocolStatus=0 )
2

The odd thing is, if you wait a min or 2 it starts responding again. The general error logs in apache do not provide any other details about any error.
If anyone has seen this before or has any recommendations, please advise.

Thanks,
Casey O'Connor
Green Olive Tree

 

[Tishu]

Hello,

Any php errors?

 

[Green Olive Tree]

Unfortunately the only thing I am seeing in the logs that look off is:

[ACL] Access to context [/] is denied!

Its just really odd issue. Client has 3 servers with similar setup and many WP accounts but only this one server is doing it.
I have checked through every log I could think of to find what is 500ing and only thing I can get is from the LS debug logs during the updates.
Any other suggestions are always appreciated.

 

[Tishu]

Hello again,

Okay, next steps:

1. Rise php limits for that page.
2. Rise LVE limits for the account.
3. Activate wp debug:

error_reporting(E_ALL); ini_set('display_errors', 1);

define( 'WP_DEBUG', true);

4. If you have firewall/mod_sec rules or similar modules, check there logs or try to deactivate them temp.

 

[Green Olive Tree]

Thanks for that information,
I had done that in the before and still received a blank page.
Come to find out it was caused by the iThemes Security plugin.
The plugin was missing a core file and sending a fatal error.
Once the error happens something was caching it and taking a few min to clear.
It is still happening but now we have something to give to the Devs.

Thanks Tishu for the assist!

 

[Tishu]

Hello again,

I`m glad that the problem is (or will be) resolve.