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https://issues.apache.org/jira/browse/KAFKA-15145?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yash Mayya updated KAFKA-15145:
-------------------------------
Description: If a RetriableException is thrown from an admin client or
producer client operation in
[AbstractWorkerSourceTask::sendRecords|https://github.com/apache/kafka/blob/5c2492bca71200806ccf776ea31639a90290d43e/connect/runtime/src/main/java/org/apache/kafka/connect/runtime/AbstractWorkerSourceTask.java#L388],
the send operation is retried for the remaining records in the batch. There is
a minor bug in the logic for computing the remaining records in a batch which
causes records that are filtered out by the task's transformation chain to be
re-processed. This will also result in the SourceTask::commitRecord method
being called twice for the same record, which can cause certain types of source
connectors to fail. This bug seems to exist ever since when SMTs were first
introduced in 0.10.2 (was: If a RetriableException is thrown from an admin
client or producer client operation in
[AbstractWorkerSourceTask::sendRecords|https://github.com/apache/kafka/blob/5c2492bca71200806ccf776ea31639a90290d43e/connect/runtime/src/main/java/org/apache/kafka/connect/runtime/AbstractWorkerSourceTask.java#L388],
the send operation is retried for the remaining records in the batch. There is
a minor bug in the logic for computing the remaining records in a batch which
causes records that are filtered out by the task's transformation chain to be
re-processed. This will also result in the SourceTask::commitRecord method
being called twice for the same record, which can cause certain types of source
connectors to fail. This bug seems to exist since when SMTs were first
introduced in 0.10.2)
> AbstractWorkerSourceTask re-processes records filtered out by SMTs on
> retriable exceptions
> ------------------------------------------------------------------------------------------
>
> Key: KAFKA-15145
> URL: https://issues.apache.org/jira/browse/KAFKA-15145
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Affects Versions: 0.10.2.0, 0.10.2.1, 0.10.2.2, 0.11.0.0, 0.11.0.1,
> 0.11.0.2, 0.11.0.3, 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, 2.0.0, 2.0.1, 2.1.0,
> 2.2.0, 2.1.1, 2.3.0, 2.2.1, 2.2.2, 2.4.0, 2.3.1, 2.5.0, 2.4.1, 2.6.0, 2.5.1,
> 2.7.0, 2.6.1, 2.8.0, 2.7.1, 2.6.2, 3.1.0, 2.6.3, 2.7.2, 2.8.1, 3.0.0, 3.0.1,
> 2.8.2, 3.2.0, 3.1.1, 3.3.0, 3.0.2, 3.1.2, 3.2.1, 3.4.0, 3.2.2, 3.2.3, 3.3.1,
> 3.3.2, 3.5.0, 3.4.1
> Reporter: Yash Mayya
> Assignee: Yash Mayya
> Priority: Minor
>
> If a RetriableException is thrown from an admin client or producer client
> operation in
> [AbstractWorkerSourceTask::sendRecords|https://github.com/apache/kafka/blob/5c2492bca71200806ccf776ea31639a90290d43e/connect/runtime/src/main/java/org/apache/kafka/connect/runtime/AbstractWorkerSourceTask.java#L388],
> the send operation is retried for the remaining records in the batch. There
> is a minor bug in the logic for computing the remaining records in a batch
> which causes records that are filtered out by the task's transformation chain
> to be re-processed. This will also result in the SourceTask::commitRecord
> method being called twice for the same record, which can cause certain types
> of source connectors to fail. This bug seems to exist ever since when SMTs
> were first introduced in 0.10.2
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