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https://issues.apache.org/jira/browse/FLINK-7913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16286799#comment-16286799
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Tzu-Li (Gordon) Tai commented on FLINK-7913:
--------------------------------------------
We should probably take that into account, and respect that the returned key
from `KeyedSerializationSchema` can actually be null. That way we'll be able to
cover both hash partitioning and round-robin partitioning (which is the Kafka
default).
We only ever write to a specific partition iff a custom partitioner is provided
by the user.
> Add support for Kafka default partitioner
> -----------------------------------------
>
> Key: FLINK-7913
> URL: https://issues.apache.org/jira/browse/FLINK-7913
> Project: Flink
> Issue Type: Improvement
> Components: Kafka Connector
> Affects Versions: 1.4.0
> Reporter: Konstantin Lalafaryan
> Assignee: Konstantin Lalafaryan
> Priority: Blocker
> Fix For: 1.5.0
>
>
> Currently in the Apache Flink it is available only *FlinkKafkaPartitioner*
> and just one implementation *FlinkFixedPartitioner*.
> In order to be able to use Kafka's default partitioner you have to create new
> implementation for *FlinkKafkaPartitioner* and fork the code from the Kafka.
> It will be really good to be able to define the partitioner without
> implementing the new class.
> Thanks.
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