Github user tzulitai commented on a diff in the pull request:
https://github.com/apache/flink/pull/5393#discussion_r165081311
--- 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 {
--- End diff --
This also needs to be `Serializable`, since it'll be shipped along with the
`JobGraph` to the JM.
---
