Apache

Common HTTP error codes and how to fix them

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Understanding Common HTTP Error Codes Running a website is exciting — until you encounter HTTP error codes like 404, 500, or 403. These codes indicate that something isn’t working correctly. Understanding them helps you fix problems quickly and prevent future issues. In this guide, we’ll explain the most common HTTP error codes and how to … Read more

Secure Your WordPress Website: Steps to Keep Your Site Safe

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Running a WordPress website is one of the easiest ways to build your online presence. However, with WordPress powering over 43% of websites in 2025, it has also become a primary target for hackers. Security experts report that WordPress sites are attacked every few minutes. That’s why WordPress security should be a top priority for … Read more

How to Fix the 500 Internal Server Error

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Internal Server Error is one of the common errors that are seen on WordPress Sites. Even though it is common error, it never has a straightforward solution, requiring a lot of troubleshooting that can eat up your time and patience. Here in this blog, I would share some of the fix, that could help you out to … Read more

Error: Failed to create temporary file

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Issue ====== The apache error log shows [Wed Oct 28 23:49:30 2015] [error] [client xx.xx.xxx.xxx] ModSecurity: Input filter: Failed to create temporary file: /root/tmp/20151028-234930-VjGXSkAWQiQAA@W7VAsAAAAD-request_body-nKiZdT [hostname “www.xxxx.com”] [uri “/wp-admin/admin.php”] [unique_id “VjGXSkAWQiQAA@W7VAsAAAAD”] The issue is because the modsecurity has no access on /root/tmp directory. So while accessing /root/tmp it will show the error “Failed to create temporary … Read more

pnp4nagios Installation and Configuration

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Installation —————- PNP is an addon for the Nagios Network Monitoring System. PNP provides easy to use, easy to configure RRDTools based performance charts feeded by the performance data output of the Nagios Plugins. To install this, 1. Download the latest version of pnp4nagios source from http://sourceforge.net/projects/pnp4nagios/ 2. Untar it and cd into the extracted … Read more

Multiple Versions of PHP in plesk

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  By default, in latest version of plesk we will have 5.4 version of php. So if you need additional php version, you can install seperatly and those additional  version will be available in fastcgi and cgi handlers. Installtion Steps for php 5.2.17 version # cd /usr/local/src # wget http://museum.php.net/php5/php-5.2.17.tar.gz # tar -zxvf php-5.2.17.tar.gz # cd … Read more

Error : “Identifier removed: couldn’t grab the accept mutex” in apache error logs

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Apache was getting stopped automatically with the below logs in the Apache Error log:

[Tue Jul 22 22:29:35 2014] [alert] Child 30758 returned a Fatal error… Apache is exiting!
[Tue Jul 22 22:29:35 2014] [emerg] (43)Identifier removed: couldn’t grab the accept mutex
[Tue Jul 22 22:29:35 2014] [emerg] (43)Identifier removed: couldn’t grab the accept mutex
[Tue Jul 22 22:29:35 2014] [emerg] (43)Identifier removed: couldn’t grab the accept mutex

These type of errors occur on systems low on memory or file handlers.The AcceptMutex directives sets the method that Apache uses to serialize multiple children accepting requests on network sockets.

One suggested resolution for the error message would be to try adding the following line to /usr/local/apache/conf/httpd.conf file:

AcceptMutex fcntl

If you add this above “<IfModule prefork.c>” in tht file, you could then try running these commands to distill the change and restart Apache:

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Product images not working and giving “Warning: Creating default object from empty value” Error

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Last day there was an issue for a wordpress installation. None of the product images are not working and if we take the image directly in the browser, we can see the below errors

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Warning: Creating default object from empty value in /home/wp-user/public_html/wp-content/plugins/shopp/core/model/Asset.php on line 123

Warning: Cannot modify header information – headers already sent by (output started at /home/wp-user/public_html/wp-content/plugins/shopp/core/model/Asset.php:123) in /home/wp-user/public_html/wp-content/plugins/shopp/core/model/Asset.php on line 199

Warning: Cannot modify header information – headers already sent by (output started at /home/wp-user/public_html/wp-content/plugins/shopp/core/model/Asset.php:123) in /home/wp-user/public_html/wp-content/plugins/shopp/core/model/Asset.php on line 200

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