Gyula Fora created FLINK-2644:
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Summary: State partitioning does not respect the different
partitioning of multiple inputs
Key: FLINK-2644
URL: https://issues.apache.org/jira/browse/FLINK-2644
Project: Flink
Issue Type: Bug
Components: Streaming
Reporter: Gyula Fora
Currently state partitioning is only available for one-input stream operators
and even for those, the partitioning will only depend on the first input.
This happens because the keyselector used to extract the partitioning key from
each element is used from the first input stream. We need to make sure that for
each input stream the corresponding key selector is used.
To do this, ctx.nextRecord(record), should be extended by adding a parameter
denoting the index of the input channel which can be used by the partitioner to
select the appropriate key selector.
The same mechanics can be extended to allow state partitioning for TwoInput
stream operators as well.
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