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https://issues.apache.org/jira/browse/FLINK-3102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15044663#comment-15044663
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ASF GitHub Bot commented on FLINK-3102:
---------------------------------------
Github user rmetzger commented on the pull request:
https://github.com/apache/flink/pull/1437#issuecomment-162465233
The `KeyedDeserializationSchema` is a new interface introduced in 1.0. I
don't want to break the existing `DeserializationSchema` with the change.
Even before the change, the `KeyedDeserializationSchema` was exposing more
than the DeserialziationSchema (the offset), it can be seen as the Rich*
variant of the DeserSchema.
> Allow reading from multiple topics with one FlinkKafkaConsumer
> --------------------------------------------------------------
>
> Key: FLINK-3102
> URL: https://issues.apache.org/jira/browse/FLINK-3102
> Project: Flink
> Issue Type: New Feature
> Components: Kafka Connector
> Reporter: Robert Metzger
> Assignee: Robert Metzger
>
> Currently, a Kafka consumer allows to read from only one topic.
> For cases where multiple topics contain messages with the same schema, it is
> useful to allow to subscribe to many topics using one FlinkKafkaConsumer
> instance.
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