Aljoscha Krettek commented on FLINK-8500:

I've moved this to 1.6 because we're already very late with the feature freeze 
for 1.5. There exists a workaround of writing a custom timestamp extractor that 
is not derived from {{AscendingTimestampExtractor}} or 
{{BoundedOutOfOrdernessTimestampExtractor}}, there you can implement the method 
{{extractTimestamp(T, long)}} which has access to the current timestamp, which 
is the Kafka timestamp in case of using the Kafka source.

> Get the timestamp of the Kafka message from kafka consumer(Kafka010Fetcher)
> ---------------------------------------------------------------------------
>                 Key: FLINK-8500
>                 URL: https://issues.apache.org/jira/browse/FLINK-8500
>             Project: Flink
>          Issue Type: Improvement
>          Components: Kafka Connector
>    Affects Versions: 1.4.0
>            Reporter: yanxiaobin
>            Priority: Blocker
>             Fix For: 1.6.0
>         Attachments: image-2018-01-30-14-58-58-167.png, 
> image-2018-01-31-10-48-59-633.png
> The method deserialize of KeyedDeserializationSchema  needs a parameter 
> 'kafka message timestamp' (from ConsumerRecord) .In some business scenarios, 
> this is useful!

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