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Failure Lab · Hard
Lost batches
A producer sends batches of 10 messages. Some messages from each batch vanish — they're never received by a consumer and never reach the DLQ.
Symptom · Producer reports SendMessageBatch success, but downstream counts are short by 1–3 messages per batch.
Goal: Zero lost messages after producing enough batches.
Hint: Set 'Handle Failed array' to 1.
analytics-ingestmetrics-batch · t0Consumers
analytics-ingest
every 2400ms
metrics-batch
0Visible0
In-flight0
aggregator
idle
Knobs
0
0 = ignore, 1 = retry failed
10
Pending
0
In-flight
0
Delivered
0
Lost
0
Avg wait
0.0t
Avg rc
0.00
Empty polls
0
DLQ
0