[DRILL-8122] Change kafka metadata obtaining due to KAFKA-5697

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.17.0, 1.18.0, 1.19.0
• Fix Version/s: 1.20.0
• Assignee: Maksym Rymar
• Reporter: Maksym Rymar
• Created: 02/Feb/22 12:28
• Updated: 25/Feb/22 13:01
• Resolved: 25/Feb/22 13:01

Description

Starting from kafka 2.0 was changed behavior of the KafkaConsumer#poll . In Drill was used one hack, where poll(0) 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.

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 .  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