[jira] [Commented] (KAFKA-4665) Inconsistent handling of non-existing topics in offset fetch handling

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-4665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15866838#comment-15866838 ] 

ASF GitHub Bot commented on KAFKA-4665:
---------------------------------------

GitHub user vahidhashemian opened a pull request:

    https://github.com/apache/kafka/pull/2550

    KAFKA-4665: Normalize handling of non-existing topics/partitions in fetching offsets

    This PR brings some consistency around how non-existing topics or partitions are handled when fetching offsets using different versions of offset fetch API.
    In particular, it now
    * returns `UNKNOWN_TOPIC_OR_PARTITION` for non-existing topics or partitions in versions 1 and later (similar to how it is done in version 0)
    * throws a `KafkaException` when consumers consume from a non-existing topic or partition, or from a topic to which they do not have Describe access.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/vahidhashemian/kafka KAFKA-4665

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/kafka/pull/2550.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #2550
    
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> Inconsistent handling of non-existing topics in offset fetch handling
> ---------------------------------------------------------------------
>
>                 Key: KAFKA-4665
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4665
>             Project: Kafka
>          Issue Type: Bug
>          Components: consumer, core
>            Reporter: Jason Gustafson
>            Assignee: Vahid Hashemian
>             Fix For: 0.10.3.0
>
>
> For version 0 of the offset fetch API, the broker returns UNKNOWN_TOPIC_OR_PARTITION for any topics/partitions which do not exist at the time of fetching. In later versions, we skip this check. We do, however, continue to return UNKNOWN_TOPIC_OR_PARTITION for authorization errors (i.e. if the principal does not have Describe access to the corresponding topic). We should probably make this behavior consistent across versions.
> Note also that currently the consumer raises {{KafkaException}} when it encounters an UNKNOWN_TOPIC_OR_PARTITION error in the offset fetch response, which is inconsistent with how we usually handle this error. This probably doesn't cause any problems currently only because of the inconsistency mentioned in the first paragraph above.



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