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From tzulitai <...@git.apache.org>
Subject [GitHub] flink pull request #5393: [FLINK-8516] Allow for custom hash function for sh...
Date Wed, 31 Jan 2018 15:20:25 GMT
Github user tzulitai commented on a diff in the pull request:

    https://github.com/apache/flink/pull/5393#discussion_r165084048
  
    --- Diff: flink-connectors/flink-connector-kinesis/src/main/java/org/apache/flink/streaming/connectors/kinesis/internals/KinesisDataFetcher.java
---
    @@ -584,17 +594,34 @@ private static ShardMetricsReporter registerShardMetrics(MetricGroup
metricGroup
     	//  Miscellaneous utility functions
     	// ------------------------------------------------------------------------
     
    +	/**
    +	 * Function to map a Kinesis shard to a Flink subtask index.
    +	 */
    +	public interface ShardToSubtaskIndexFn {
    +		/**
    +		 * Function to map a Kinesis shard to a Flink subtask index.
    --- End diff --
    
    This needs a much more stronger Javadoc explaining the contract of deterministic assignments.
    See `KafkaTopicPartitionAssigner` for an example.


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