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https://issues.apache.org/jira/browse/KAFKA-3547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15236783#comment-15236783
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Magnus Edenhill commented on KAFKA-3547:
----------------------------------------
Fixed in
https://github.com/apache/kafka/commit/bb643f83a95e9ebb3a9f8331fe9998c8722c07d4#diff-d0332a0ff31df50afce3809d90505b25R80
> Broker does not disconnect client on unknown request
> ----------------------------------------------------
>
> Key: KAFKA-3547
> URL: https://issues.apache.org/jira/browse/KAFKA-3547
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 0.9.0.0, 0.9.0.1
> Reporter: Magnus Edenhill
> Priority: Critical
> Fix For: 0.10.0.0
>
>
> A regression in 0.9.0 causes the broker to not close a client connection when
> receiving an unsupported request.
> Two effects of this are:
> - the client is not informed that the request was not supported (even though
> a closed connection is a blunt indication it is infact some indication), the
> request will (hopefully) just time out on the client after some time,
> stalling sub-sequent operations.
> - the broker leaks the connection until the connection reaper brings it down
> or the client closes the connection
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