[jira] [Created] (KAFKA-2388) subscribe(topic)/unsubscribe(topic) should either take a callback to allow user to handle exceptions or it should be synchronous.

[Jiangjie Qin (JIRA)]

Jiangjie Qin created KAFKA-2388:
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             Summary: subscribe(topic)/unsubscribe(topic) should either take a 
callback to allow user to handle exceptions or it should be synchronous.
                 Key: KAFKA-2388
                 URL: https://issues.apache.org/jira/browse/KAFKA-2388
             Project: Kafka
          Issue Type: Sub-task
            Reporter: Jiangjie Qin


Currently subscribe/unsubscribe at topic level is asynchronous and it is 
difficult for user to know whether the  when the subscription finishes or 
whether the subscription succeeded or failed.
It should either take a callback to allow user handle exception or it should be 
synchronous.



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