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https://issues.apache.org/jira/browse/KAFKA-4144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15836739#comment-15836739
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Elias Levy commented on KAFKA-4144:
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What Matthias said. The issue has nothing to do with different applications.
The problem is that the single configurable TimestampExtractor is used for all
input topics. That means you must dump the timestamps extraction logic for all
topics, which may be quite different, into a single TimestampExtractor.
Imagine if you could only configure a single SerDe that would have to handle
all topics, instead of being able to configure a SerDe per topic.
> Allow per stream/table timestamp extractor
> ------------------------------------------
>
> Key: KAFKA-4144
> URL: https://issues.apache.org/jira/browse/KAFKA-4144
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Affects Versions: 0.10.0.1
> Reporter: Elias Levy
> Assignee: Jeyhun Karimov
> Labels: api
>
> At the moment the timestamp extractor is configured via a StreamConfig value
> to KafkaStreams. That means you can only have a single timestamp extractor
> per app, even though you may be joining multiple streams/tables that require
> different timestamp extraction methods.
> You should be able to specify a timestamp extractor via
> KStreamBuilder.stream/table, just like you can specify key and value serdes
> that override the StreamConfig defaults.
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