The bug is coming from inside the house
Description
This image is a screenshot of a tweet from a user named 'DevOps Dan' (@scripticles), who has a profile picture of a golden rubber duck. The tweet reads: 'Gonna be one of those days. Just spent the past two hours debugging why, after a test upload of an image, when I try to view it, I get redirected to an error page. Turns out I uploaded a screenshot of an error page.' The tweet is appended with the hashtags #programming and #devops. The humor lies in the deeply relatable 'facepalm' moment experienced by the developer. They embarked on a lengthy debugging session, likely exploring complex causes like server misconfigurations, broken application logic, or database errors. The punchline reveals the problem wasn't a technical bug at all, but a simple, self-inflicted user error. For experienced engineers, this is a humorous reminder that sometimes the most time-consuming problems are caused by overlooking the most basic assumptions, and that the first thing to debug is often your own input
Comments
7Comment deleted
A classic PEBKAC error, except this time the 'P' stands for 'Programmer'
After 30 minutes in the war room correlating Grafana, Jaeger, and NGINX logs, we finally found the root cause of the persistent 500s: I’d deployed a PNG of the error page - turns out Layer 8 failures don’t show up in distributed traces
The most expensive debugging sessions are when you realize the bug was actually a feature of your test data - like when your error monitoring is so good it catches errors that don't exist yet because you're literally uploading them as JPEGs
A masterclass in root cause analysis: spent two hours debugging a redirect loop, only to discover the bug was between the keyboard and chair. The system was working perfectly - it correctly displayed an error page when you uploaded... an error page. Sometimes the most elegant solution is realizing you're the edge case. This is the infrastructure equivalent of 'works on my machine' meeting 'garbage in, garbage out,' with a side of 'have you tried turning yourself off and on again?' At least the error handling was robust enough to consistently fail in exactly the way it should
Turns out if your test asset is a screenshot of the 500 page, the image viewer dutifully redirects to /error. Strong consistency - just for failure
Two hours chasing a phantom 302; RCA: 200 OK on error.png - no amount of tracing helps when the 5xx is drawn, not thrown
When your minimal repro is the error page itself - now that's a bug eating its own tail