dengziming created KAFKA-9291:
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Summary: remove the code of KAFKA-9288 which bring fatal bug
Key: KAFKA-9291
URL: https://issues.apache.org/jira/browse/KAFKA-9291
Project: Kafka
Issue Type: Improvement
Reporter: dengziming
Assignee: dengziming
Attachments: image-2019-12-11-19-23-04-499.png,
image-2019-12-11-19-28-29-559.png, image-2019-12-11-19-29-28-156.png,
image-2019-12-11-19-29-53-353.png
KAFKA-9288 add some code which I didn't now fully understand, but it indeed
bring some bug which is serious and I debugged the process:
1. when consumer client start, an `ApiVersionsRequest` are send
2. KafkaApis. handleApiVersionsRequest(request) are invoke
3. ApiVersionsResponse.createApiVersionsResponse()
4. and it will add all `ApiVersionsResponseKey` to
`ApiVersionsResponseKeyCollection`
5. every time add an element will return false!( I didn't find the reason)
!image-2019-12-11-19-23-04-499.png!
6. after the for loop, the `ApiVersionsResponseKeyCollection` is EMPTY!
!image-2019-12-11-19-28-29-559.png!
7. when the Client receive the response, ERROR will occur.
!image-2019-12-11-19-29-28-156.png!
8. and my application was terminated
!image-2019-12-11-19-29-53-353.png!
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