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  1. Samza
  2. SAMZA-839

KafkaSystemProducer should use the same partitioning hash function as Kafka's producer

    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 0.9.1
    • Fix Version/s: None
    • Component/s: kafka
    • Labels:
      None

      Description

      Samza's KafkaSystemProducer class generates the partition key using:

      abs(envelope.getPartitionKey.hashCode()) % numPartitions

      However, Kafka's producer generates the partition key this way:

      Utils.abs(Utils.murmur2(record.key())) % numPartitions

      This makes it difficult for me to join 2 data sources on a common key when one source is produced by Samza and the other by a default Kafka producer.

      As a work-around, I have to modify the upstream job (that uses the default kafka producer) to write with an explicit partition key using Samza's hashing logic.

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              • Assignee:
                Unassigned
                Reporter:
                kishorenc Kishore Nallan
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                Dates

                • Created:
                  Updated: