'How to debug 500 Error in Symfony 2 and above
I am struggling with Symfony 2 error reporting because I can't find out what really is happing when a 500 Error is triggered.
I have XDebug correctly installed, but it seems like Symfony rules everything.
The custom pages just says:
Oops! An Error Occurred
The server returned a "500 Internal Server Error".
Something is broken. Please e-mail us at [email] and let us know what you were doing when this error occurred. We will fix it as soon as possible. Sorry for any inconvenience caused.
That's pretty much funny! Something is broken, but, the fact is that I need to fix my code, but can't know what or where it is the problem! And sure, If I send an email for the Symfony team will they be able to solve my problem once I not even know what to say them?
Some clue on what I am missing here?
Solution 1:[1]
For Symfony 2 and below,
First, look at the logs in app/logs depending on your environment — dev.log for development, prod.log for production, etc.
If the code crashes before Symfony has a chance to run, check the logs of your web server — e.g. nginx.
Solution 2:[2]
If you have a symfony flex project, it is also possible that you forgot to install monolog ;) Run:
composer req log
Solution 3:[3]
For Symfony versions 3.x, 4.x, 5.x, 6.x and above,
The logs will be found depending on the environment
- For dev env -
var/logs/dev.log - For prod env-
var/logs/prod.log
Also, as the accepted answer suggests, you might have to check the server logs if your app crashes before even reaching Symfony.
Usual location for server logs is listed below -
- For apache server -
ls /var/log/apache2 - For Nginx server -
ls /var/log/nginx
Solution 4:[4]
sudo chmod -R o+w var/cache/
from inside the project's folder, solved the problem for me, at least this time :)
There were no errors in Symfony's or web server's logs.
What caused the problem
It turned out that the problem was caused by me previously removing the cache folder, and regenerating the cache, i.e.
rm -fr var/cache/
./bin/console cache:clear
After that, var/cache became drwxr-xr-x.
Solution 5:[5]
An even better way to improve your Symfony debugging process is to have Monit monitor your Symfony and Apache logs for any errors and send you emails whenever something bad happens: http://intelligentbee.com/blog/2016/01/12/how-to-monitor-symfony-and-apache-logs-with-mmonit/
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Niket Pathak |
| Solution 2 | onok |
| Solution 3 | Niket Pathak |
| Solution 4 | |
| Solution 5 | Sebastian |