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Posted to dev@kafka.apache.org by "Will Funnell (JIRA)" <ji...@apache.org> on 2015/02/23 17:20:11 UTC

[jira] [Created] (KAFKA-1977) Make logEndOffset available in the Zookeeper consumer

Will Funnell created KAFKA-1977:
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             Summary: Make logEndOffset available in the Zookeeper consumer
                 Key: KAFKA-1977
                 URL: https://issues.apache.org/jira/browse/KAFKA-1977
             Project: Kafka
          Issue Type: Improvement
          Components: core
            Reporter: Will Funnell
            Priority: Minor


The requirement is to create a snapshot from the Kafka topic but NOT do continual reads after that point. For example you might be creating a backup of the data to a file.

In order to achieve that, a recommended solution by Joel Koshy and Jay Kreps was to expose the high watermark, as maxEndOffset, from the FetchResponse object through to each MessageAndMetadata object in order to be aware when the consumer has reached the end of each partition.

The submitted patch achieves this by adding the maxEndOffset to the PartitionTopicInfo, which is updated when a new message arrives in the ConsumerFetcherThread and then exposed in MessageAndMetadata.

See here for discussion:
http://search-hadoop.com/m/4TaT4TpJy71




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