Jacob Park created FLINK-9083:
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Summary: Add async backpressure support to Cassandra Connector
Key: FLINK-9083
URL: https://issues.apache.org/jira/browse/FLINK-9083
Project: Flink
Issue Type: Improvement
Components: Cassandra Connector
Reporter: Jacob Park
As the CassandraSinkBase derivatives utilize async writes, they do not block
the task to introduce any backpressure.
I am currently using a semaphore to provide backpressure support by blocking at
a maximum concurrent requests limit like how DataStax's Spark Cassandra
Connector functions:
[https://github.com/datastax/spark-cassandra-connector/blob/v2.0.7/spark-cassandra-connector/src/main/scala/com/datastax/spark/connector/writer/AsyncExecutor.scala#L18]
This improvement has greatly improved the fault-tolerance of our Cassandra Sink
Connector implementation on Apache Flink in production. I would like to
contribute this feature back upstream.
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