This is a submission for DEV's Summer Bug Smash: Smash Stories powered by Sentry.
🦄 I debated writing this for a long time, but I finally talked ...
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I really enjoyed this because every visible failure was real, which is exactly what made the root cause so hard to see.
The exhausted connection pool was real. The timeouts were real. The zombie JDBC work was real. The deadlocks were real. But they were all downstream effects of one finite identifier range quietly reaching zero in an environment that was never being cleaned up.
That is probably the part I liked most: every fix along the way improved the system, so each one looked plausible enough to be “the fix” for a while.
The final breakdown into four ordinary failures stacked on top of each other was excellent too. Missing cleanup, no exhausted state, timeout boundaries that did not cancel the underlying JDBC work, and logging that described every symptom except the actual condition.
And “the loudest problem in the room is almost never the one actually biting you” is a very good line to keep from this story.
Congratulations on making it into the Hall of Fame, very well deserved. 🎉 And if you ever feel like stopping by my corner of DEV, you're always welcome.
What makes this story so good is that every visible failure was real, but none of them was the root cause.
The pool was exhausted. The timeouts were real. The zombie JDBC work was real. The deadlocks were real. But they were all downstream effects of one finite resource silently reaching zero.
I’d push back slightly on the idea that the loop wasn’t wrong. Running out of identifiers may be a data or housekeeping failure, but an unbounded search turns that local failure into a system-wide resource incident. One complete pass through the range should end with a clear IdentifierRangeExhausted error, even if cleanup is still the operational fix.
Also, “permanently solved with a Confluence page” may be the most accurate enterprise sentence I’ve read this week. 😄
Thanks for the thoughtful comment! I agree that leaving an unbounded search in the codebase is a terrible idea and there's a backlog item for it somewhere 😆 My intent was more that the loop itself wasn't wrong logically speaking. It's necessary, just excessive. Glad you enjoyed the post!
Impressive work. It’s always good to see people sharing their progress and knowledge. I’m always open to connecting with talented builders and exchanging ideas that can help us grow.
Thank you! And same. Feel free to reach out wherever you can find me. My username is the same everywhere.
I enjoyed this—it starts off feeling simple, but it quickly turns into a clever reminder of how assumptions can mislead us. The humor lands well, and the underlying logic makes it memorable. It's a fun read that encourages readers to slow down and think before jumping to conclusions. Thanks for sharing! 👏
Thank you!
This was a fun read. I liked how the story kept peeling back layers instead of blaming the first symptom, connection pools, deadlocks, and timeouts all turned out to be consequences, not the cause. The ending really drives home how small assumptions can snowball in legacy systems.
Thanks! Glad you enjoyed it.
Reminds me of the Fruit Punch