Event Buffer Backpressure Cheat Sheet
Stop debugging stream hangs in production. Get answers in 30 seconds instead of 15 minutes of doc-diving, a single-page visual reference for RxJS, Kotlin Flow, and reactive systems.
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What's Inside
- 8 Buffer Overflow Strategies at a Glance
- Completion vs. Error vs. Dispose Flowchart
- Reader Blockage Detection Checklist
- Writer Strandedness Symptoms & Fixes
- Language-Specific Code Snippets
- How to Use This Cheat Sheet
Free Preview — first chapter
Symptom 1: Writer thread never returns from `.emit()` or `.send()` Cause: Writer is blocked waiting for buffer space. Reader is slow or absent. Diagnosis:
- Thread dump: Look for the writer thread. Is it inside `emit()` with stack trace pointing to `ArrayBlockingQueue.put()` or similar?
- RxJS rarely shows this (async by default) unless using `toPromise()` or synchronous Subject.
- Kotlin Flow: `.collect()` is synchronous, if collector is slow, emitter is blocked. Fix:
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