bug-root-cause-finder
Bug Root Cause Finder
Systematic methods for finding the true source of bugs, not just symptoms.
Core Principle: Symptom ≠ Cause
The location where an error manifests is rarely where the bug originates.
Error Location: OrderController::show() - NullPointerException
Symptom Location: OrderRepository::find() - returns null
Root Cause: OrderCreatedHandler - failed to persist order
True Root Cause: RabbitMQ message lost due to missing ACK
Method 1: 5 Whys Technique
Ask "why" repeatedly until you reach the root cause.
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