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https://issues.apache.org/jira/browse/KAFKA-5289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16017075#comment-16017075
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Ismael Juma commented on KAFKA-5289:
------------------------------------

Thanks for the report. Great catch. What kind of exceptions can 
`shutdownIdleFetcherThreads()` throw?

> One StopReplicaRequest will caused two Responses
> ------------------------------------------------
>
>                 Key: KAFKA-5289
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5289
>             Project: Kafka
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 0.10.0.0
>            Reporter: xuzq
>            Priority: Critical
>         Attachments: handleStopReplicaRequest.png
>
>
> After discussed with my friend markTC´╝îwe find a bug.
> One StopReplicaRequest will caused two Responses.
> At core/src/main/scala/kafka/server/KafkaApi.class 175 and 176 lines.
> When an exception caused at 
> 'replicaManager.replicaFetcherManager.shutdownIdleFetcherThreads()', 
> will also return two responses.
> one is at 'requestChannel.sendResponse(new RequestChannel.Response(request, 
> new ResponseSend(request.connectionId, responseHeader, response)))' and 
> another at 'requestChannel.sendResponse(new Response(request, new 
> ResponseSend(request.connectionId, respHeader, response)))'.



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