[SPARK-18580] Use spark.streaming.backpressure.initialRate in DirectKafkaInputDStream

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.2
• Component/s: DStreams
• Target Version/s: 2.4.0
• Assignee: Oleksandr Konopko
• Reporter: Oleg Muravskiy
• Created: 24/Nov/16 16:22
• Updated: 28/Feb/19 11:04
• Resolved: 21/Mar/18 19:46

Description

Currently the `spark.streaming.kafka.maxRatePerPartition` is used as the initial rate when the backpressure is enabled. This is too exhaustive for the application while it still warms up.
This is similar to SPARK-11627, applying the solution provided there to DirectKafkaInputDStream.

Issue Links

• links to: [Github] Pull Request #16006 (omuravskiy)
• links to: [Github] Pull Request #19431 (akonopko)