Apurva Mehta created KAFKA-5273:
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Summary: KafkaConsumer.committed() should get latest committed
offsets from the server
Key: KAFKA-5273
URL: https://issues.apache.org/jira/browse/KAFKA-5273
Project: Kafka
Issue Type: Sub-task
Reporter: Apurva Mehta
Currently, the `KafkaConsumer.committed(topicPartition)` will return the
current position of the consumer for that partition if the consumer has been
assigned the partition. Otherwise, it will lookup the committed position from
the server.
With the new producer `sendOffsetsToTransaction` api, we get into a state where
we can commit the offsets for an assigned partition through the producer. So
the consumer doesn't update it's cached view and subsequently returns a stale
committed offset for it's assigned partition.
We should either update the consumer's cache when offsets are committed through
the producer, or drop the cache totally and always lookup the server to get the
committed offset. This way the `committed` method will always return the latest
committed offset for any partition.
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