On-callMediumoc-p114

Subject Incident responseLevel Mid–Senior~20 minCommon in Reliability & on-call interviewsIndustries Technology, Software development

Question

A queue's consumer is stuck — it keeps failing on one message, retrying it forever, and nothing behind it is being processed (the whole queue is backed up). How do you respond?

What a strong answer looks like

Stop the bleeding first (mitigate), then form hypotheses from real signals. Separate root cause from symptom, communicate status as you go, and close with what prevents a repeat.

Learn the concepts

Diagram & narrate the incident

Loading whiteboard…

Run or narrate your approach, then ask the coach.