Sort Failure Clues by Layer
Classify failure evidence by the layer it most directly implicates.
Sort each troubleshooting clue by the layer it most directly points to. Do not solve root cause yet. Classify the evidence first. Application Data plane Control plane Dependency App log shows null pointer on every POST /orders request Envoy response flag shows upstream connection reset before headers istioctl analyze reports VirtualService rule is unreachable DestinationRule subset selector does not match any ready pods Proxy reports mTLS handshake failures for one caller identity Database connection pool is exhausted during the same window Payment provider p95 latency jumps from 300 ms to 4 seconds Handler returns 400 for malformed payloads before the…
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