Matthias J. Sax created KAFKA-4738:
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             Summary: Remove generic type of class ClientState
                 Key: KAFKA-4738
                 URL: https://issues.apache.org/jira/browse/KAFKA-4738
             Project: Kafka
          Issue Type: Bug
          Components: streams
            Reporter: Matthias J. Sax
            Priority: Minor


Currently, class 
{{org.apache.kafka.streams.processor.internals.assignment.ClientState<T>}} uses 
a generic type. However, within actual Streams code base the type will always 
be {{TaskId}} (from package {{org.apache.kafka.streams.processor}}).

Thus, this ticket is about removing the generic type and replace it with 
{{TaskId}}, to simplify the code base.

There are some tests, that use {{ClientState<Integer>}} (what allows for a 
slightly simplified test setup).  Those tests need to be updated to work 
properly using {{TaskId}} instead of {{Integer}}.



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