Web Reference: Oct 26, 2015 · I'm running my Flask application with uWSGI and nginx. There's a 500 error, but the traceback doesn't appear in the browser or the logs. How do I log the traceback from Flask? The uWSGI log only shows the 500 status code, not the traceback. There's also nothing in the nginx log. By default if your application runs in production mode, and an exception is raised Flask will display a very simple page for you and log the exception to the logger. But there is more you can do, and we will cover some better setups to deal with errors including custom exceptions and 3rd party tools. Error Logging Tools ¶ Dec 16, 2025 · When deploying Flask applications behind Nginx, Python tracebacks often disappear into the void. You see a 500 error in Nginx access logs but no details about what went wrong. This guide explains why this happens and how to configure proper error logging across your stack.
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