Liang-Chi Hsieh created SPARK-12203:
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Summary: Add KafkaDirectInputDStream that directly pulls messages
from Kafka Brokers using receivers
Key: SPARK-12203
URL: https://issues.apache.org/jira/browse/SPARK-12203
Project: Spark
Issue Type: New Feature
Components: Streaming
Reporter: Liang-Chi Hsieh
Currently, we have DirectKafkaInputDStream, which directly pulls messages from
Kafka Brokers without any receivers, and KafkaInputDStream, which pulls
messages from a Kafka Broker using receiver with zookeeper.
As we observed, because DirectKafkaInputDStream retrieves messages from Kafka
after each batch finishes, it posts a latency compared with KafkaInputDStream
that continues to pull messages during each batch window.
So we try to add KafkaDirectInputDStream that directly pulls messages from
Kafka Brokers as DirectKafkaInputDStream, but it uses receivers as
KafkaInputDStream and pulls messages during each batch window.
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