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| config | current default value | proposed default value |
|---|---|---|
| enable.idempotence | false | true |
| acks | 1 | all |
| max.in.flight.requests.per.connection | 5 | 2 |
| retries | 0 | MAX_INT |
There will be no other publicly visible changes required.
The changes above would guarantee exactly once, in order delivery per partition for topics with replication-factor >= 2, and assuming that the system doesn't suffer multiple hard failures or concurrent transient failures.
Proposed Changes
Code changes
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