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https://issues.apache.org/jira/browse/KAFKA-1588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14092461#comment-14092461
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Guozhang Wang commented on KAFKA-1588:
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As have discussed with Todd, changing the map to set in the offset response
would resolve this problem.
> Offset response does not support two requests for the same topic/partition
> combo
> --------------------------------------------------------------------------------
>
> Key: KAFKA-1588
> URL: https://issues.apache.org/jira/browse/KAFKA-1588
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.8.2
> Reporter: Todd Palino
>
> When performing an OffsetFetchRequest, if you request the same topic and
> partition combination in a single request more than once (for example, if you
> want to get both the head and tail offsets for a partition in the same
> request), you will get a response for both, but they will be the same offset.
> We identified that the problem is that when the offset response is assembled,
> a map is used to store the offset info before it is converted to the response
> format and sent to the client. Therefore, the second request for a
> topic/partition combination will overwrite the offset from the first request.
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