[jira] [Created] (KAFKA-4675) Subsequent CreateTopic command could be lost after a DeleteTopic command

["Guozhang Wang (JIRA)" <ji...@apache.org>]

Guozhang Wang created KAFKA-4675:
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             Summary: Subsequent CreateTopic command could be lost after a DeleteTopic command
                 Key: KAFKA-4675
                 URL: https://issues.apache.org/jira/browse/KAFKA-4675
             Project: Kafka
          Issue Type: Bug
            Reporter: Guozhang Wang


This is discovered while investigating KAFKA-3896: If an admin client sends a delete topic command and a create topic command consecutively, even if it wait for the response of the previous command before issuing the second, there is still a race condition that the create topic command could be "lost".

This is because currently these commands are all asynchronous as defined in KIP-4, and controller will return the response once it has written the corresponding data to ZK path, which can be handled by different listener threads at different paces, and if the thread handling create is faster than the other, the executions could be effectively re-ordered.



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