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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-9083) Add async backpressure support to Cassandra Connector
Date Tue, 02 Oct 2018 07:16:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-9083?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

ASF GitHub Bot updated FLINK-9083:
    Labels: pull-request-available  (was: )

> 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
>            Assignee: Jacob Park
>            Priority: Minor
>              Labels: pull-request-available
> 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

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