Bobcares

CWP 502 Bad Gateway Error – Let’s fix it

by | Mar 6, 2020

Are you stuck with CWP 502 Bad Gateway error? We can help you fix it.

The CentOS Web Panel uses PHP-FPM to serve PHP pages quickly. Often, when PHP-FPM goes down, it throws Bad Gateway errors.

At Bobcares, we help our server owners to fix the CentOS WebPanel errors as part of our Server Management Services.

Today, let’s see what causes the CWP error “502 Bad Gateway” and how our Support Engineers fix it.

 

Causes of CWP 502 Bad Gateway Error

In general, the CentOS Web Panel shows the 502 error page, when the underlying PHP handler fails to work properly. CWP uses PHP-FPM to process backend data.

PHP-FPM is an advanced and highly-efficient processor for the PHP scripting language. And, as a high-level programming language, PHP scripts require compiling before a web server’s underlying processor hardware can understand it.

Therefore, the PHP-FPM service must run on the same server as the webserver.

And, hence when this PHP-FPM is down, CWP fails in getting results and 502 Bad Gateway error occurs.

 

How we fix the 502 Bad Gateway Error?

Recently, one of our customers approached us with an error message. He was hitting 502 Bad Gateway errors in his CentOS Web Panel.

cwp_502_bad_gateway

And, when this error showed up, he couldn’t log into his CWP admin panel to do any tasks.

Our Support Engineers had a precise look into the error.

We checked whether the status of the service using the below command.

systemctl status cwp-phpfpm

Here, the service was not running and we were not able to start it. Then, we tried to find the User that caused the error by checking the log files.

tail /usr/local/cwp/php71/var/log/php-fpm.log

Here, we got the name of the user that caused the error. For instance, in our case bob.conf created problems.

After that, we deleted the file from /usr/local/cwp/php71/etc/php-fpm.d/users/bob.conf  by running the command,

rm -f /usr/local/cwp/php71/etc/php-fpm.d/users/bob.conf

Finally, we started the PHP-FPM service using the command,

systemctl start cwp-phpfpm

And, this resolved the error.

 

Restarting the CWP webserver

Similarly, in many cases, restarting the CWP server will also remove the error.

To do so, we run the below command in the command prompt.

sh /scripts/restart_cwpsrv

This restarts the cwpsrv service and makes the panel working again.

 

[Need more assistance to fix CWP errors? – We’re available 24/7 to help you.]

 

Conclusion

In short, CWP 502 Bad Gateway error occurs when the PHP script handler PHP-FPM service is down.  In today’s writeup, we discussed how our Support Engineers fixed this error effectively for our customers.

PREVENT YOUR SERVER FROM CRASHING!

Never again lose customers to poor server speed! Let us help you.

Our server experts will monitor & maintain your server 24/7 so that it remains lightning fast and secure.

GET STARTED

var google_conversion_label = "owonCMyG5nEQ0aD71QM";

0 Comments

Submit a Comment

Your email address will not be published. Required fields are marked *

Never again lose customers to poor
server speed! Let us help you.

Privacy Preference Center

Necessary

Necessary cookies help make a website usable by enabling basic functions like page navigation and access to secure areas of the website. The website cannot function properly without these cookies.

PHPSESSID - Preserves user session state across page requests.

gdpr[consent_types] - Used to store user consents.

gdpr[allowed_cookies] - Used to store user allowed cookies.

PHPSESSID, gdpr[consent_types], gdpr[allowed_cookies]
PHPSESSID
WHMCSpKDlPzh2chML

Statistics

Statistic cookies help website owners to understand how visitors interact with websites by collecting and reporting information anonymously.

_ga - Preserves user session state across page requests.

_gat - Used by Google Analytics to throttle request rate

_gid - Registers a unique ID that is used to generate statistical data on how you use the website.

smartlookCookie - Used to collect user device and location information of the site visitors to improve the websites User Experience.

_ga, _gat, _gid
_ga, _gat, _gid
smartlookCookie
_clck, _clsk, CLID, ANONCHK, MR, MUID, SM

Marketing

Marketing cookies are used to track visitors across websites. The intention is to display ads that are relevant and engaging for the individual user and thereby more valuable for publishers and third party advertisers.

IDE - Used by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.

test_cookie - Used to check if the user's browser supports cookies.

1P_JAR - Google cookie. These cookies are used to collect website statistics and track conversion rates.

NID - Registers a unique ID that identifies a returning user's device. The ID is used for serving ads that are most relevant to the user.

DV - Google ad personalisation

_reb2bgeo - The visitor's geographical location

_reb2bloaded - Whether or not the script loaded for the visitor

_reb2bref - The referring URL for the visit

_reb2bsessionID - The visitor's RB2B session ID

_reb2buid - The visitor's RB2B user ID

IDE, test_cookie, 1P_JAR, NID, DV, NID
IDE, test_cookie
1P_JAR, NID, DV
NID
hblid
_reb2bgeo, _reb2bloaded, _reb2bref, _reb2bsessionID, _reb2buid

Security

These are essential site cookies, used by the google reCAPTCHA. These cookies use an unique identifier to verify if a visitor is human or a bot.

SID, APISID, HSID, NID, PREF
SID, APISID, HSID, NID, PREF