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Posted to issues@drill.apache.org by "Maksym Rymar (Jira)" <ji...@apache.org> on 2022/02/02 12:29:00 UTC

[jira] [Created] (DRILL-8122) Change kafka metadata obtaining due to KAFKA-5697

Maksym Rymar created DRILL-8122:
-----------------------------------

             Summary: Change kafka metadata obtaining due to KAFKA-5697
                 Key: DRILL-8122
                 URL: https://issues.apache.org/jira/browse/DRILL-8122
             Project: Apache Drill
          Issue Type: Bug
    Affects Versions: 1.19.0, 1.18.0, 1.17.0
            Reporter: Maksym Rymar
            Assignee: Maksym Rymar
             Fix For: 1.20.0


Starting from kafka 2.0 was changed behavior of the [KafkaConsumer#poll|https://kafka.apache.org/11/javadoc/org/apache/kafka/clients/consumer/KafkaConsumer.html#poll-long-] . In Drill was used one hack, where poll() is used only to update consumer metadata. But after the next change: [https://github.com/apache/kafka/pull/4855] this hack is not working now as poll() is not blocked more until metadata update yet more.

Unfortunately, Kafka doesn't have public method to only update assignment metadata in consumer and it's on the discussion now whether to add it or not: [KIP-505|https://cwiki.apache.org/confluence/display/KAFKA/KIP-505%3A+Add+new+public+method+to+only+update+assignment+metadata+in+consumer] .  Once it will be introduced we can use it but until that it needs to implement a workaround.

Code to change:

https://github.com/apache/drill/blob/15b2f52260e4f0026f2dfafa23c5d32e0fb66502/contrib/storage-kafka/src/main/java/org/apache/drill/exec/store/kafka/KafkaGroupScan.java#L185



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