Github user tzulitai commented on a diff in the pull request:
@@ -107,6 +112,17 @@ protected ShardConsumer(KinesisDataFetcher<T>
--- End diff --
I think it might be cleaner if we extract / parse the `initTimestamp` in
the sentinel sequence number case determination at the beginning of run().
As for checking if the timestamp is parseable, we should do that when
validating the user-provided property configs locally at the job client. You
can take a look at the constructor code of `FlinkKinesisConsumer` - that's
where we validate the properties. This validation is done at the job client, so
that if in any case the properties is errorneous / unparseable, we can handle
that _before_ a Flink job is actually launched.
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