Christopher Ng created FLINK-9295:
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Summary: FlinkKafkaProducer011 sometimes throws
ProducerFencedExceptions when in EXACTLY_ONCE mode
Key: FLINK-9295
URL: https://issues.apache.org/jira/browse/FLINK-9295
Project: Flink
Issue Type: Bug
Components: Kafka Connector
Affects Versions: 1.4.2
Reporter: Christopher Ng
{{FlinkKafkaProducer011}} can throw {{ProducerFencedExceptions}} if multiple
sinks are used within the same sub-task. This can happen when chaining results
in two different sinks in the same topology being chained into a single
sub-task.
The problem is that {{TransactionIdsGenerator}} only takes into account the
task name, the subtask index, the number of subtasks, and a couple of other
things. All the attributes are the same between different
{{FlinkKafkaProducer011s}} within the same sub-task, so they get the same
transaction ids and one of them ends up failing.
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