By Henok
One of my DO servers that we are using as a test environment works well most of the time, but at seemingly random times, the server responds with a “502 Bad Gateway” error.
In the nginx logs, I can see the following error message: 2019/06/27 13:46:15 [error] 1013#1013: *19539 connect() to unix:/var/run/php/php7.3-fpm.sock failed (111: Connection refused) while connecting to upstream, client: 117.204.xxx.xxx, server: subdomain1.sometestdomain123.xyz, request: “POST /client/communicationNotifyAlerts HTTP/2.0”, upstream: “fastcgi://unix:/var/run/php/php7.3-fpm.sock:”, host: “subdomain1.sometestdomain123.xyz”, referrer: “https://subdomain1.sometestdomain123.xyz/client/api1”
I’m guessing this could be happening after updating our php code but not performing a restart? Could this be caused by something else.
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
Accepted Answer
Hello,
It looks like that your PHP FPM service is crashing. If you see that 502 error just try starting PHP FPM and it should start working as normal.
I would recommend checking your syslogs to further investigate the problem, maybe your server is out of RAM and that’s why PHP FPM gets killed.
Here is a link to an answer on how to troubleshoot common Nginx problems:
And here is also a quick video demo on how to do that as well:
Hope that this helps! Bobby
Become a contributor for community
Get paid to write technical tutorials and select a tech-focused charity to receive a matching donation.
DigitalOcean Documentation
Full documentation for every DigitalOcean product.
Resources for startups and SMBs
The Wave has everything you need to know about building a business, from raising funding to marketing your product.
The developer cloud
Scale up as you grow — whether you're running one virtual machine or ten thousand.
Get started for free
Sign up and get $200 in credit for your first 60 days with DigitalOcean.*
*This promotional offer applies to new accounts only.