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https://issues.apache.org/jira/browse/FLINK-8132?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek closed FLINK-8132.
-----------------------------------
Resolution: Fixed
Fixed on release-1.4 in
27564c33955d8e53f0275a5b43d4b2415ba86547
Fixed on master in
f214e7d8ed5a38a8b56f12cf8d7bc7dd0ba31189
> FlinkKafkaProducer011 can commit incorrect transaction during recovery
> ----------------------------------------------------------------------
>
> Key: FLINK-8132
> URL: https://issues.apache.org/jira/browse/FLINK-8132
> Project: Flink
> Issue Type: Bug
> Components: Kafka Connector
> Reporter: Piotr Nowojski
> Assignee: Piotr Nowojski
> Priority: Blocker
> Fix For: 1.4.0
>
>
> Faulty scenario with producer pool of 2.
> 1. started transaction 1 with producerA, written record 42
> 2. checkpoint 1 triggered, pre committing txn1, started txn2 with producerB,
> written record 43
> 3. checkpoint 1 completed, committing txn1, returning producerA to the pool
> 4. checkpoint 2 triggered , committing txn2, started txn3 with producerA,
> written record 44
> 5. crash....
> 6. recover to checkpoint 1, txn1 from producerA found to
> "pendingCommitTransactions", attempting to recoverAndCommit(txn1)
> 7. unfortunately txn1 and txn3 from the same producers are identical from
> KafkaBroker perspective and thus txn3 is being committed
> result is that both records 42 and 44 are committed.
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