[jira] [Reopened] (KAFKA-1637) SimpleConsumer.fetchOffset returns wrong error code when no offset exists for topic/partition/consumer group

["Joel Koshy (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-1637?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joel Koshy reopened KAFKA-1637:
-------------------------------

> SimpleConsumer.fetchOffset returns wrong error code when no offset exists for topic/partition/consumer group
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-1637
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1637
>             Project: Kafka
>          Issue Type: Bug
>          Components: consumer, core
>    Affects Versions: 0.8.1, 0.8.1.1
>         Environment: Linux
>            Reporter: Amir Malekpour
>            Assignee: Ewen Cheslack-Postava
>              Labels: newbie
>         Attachments: KAFKA-1637.patch
>
>
> This concerns Kafka's Offset  Fetch API:
> According to Kafka's current documentation, "if there is no offset associated with a topic-partition under that consumer group the broker does not set an error code (since it is not really an error), but returns empty metadata and sets the offset field to -1."  (Link below)
> However, in Kafka 08.1.1 Error code '3' is returned, which effectively makes it impossible for the client to decide if there was an error, or if there is no offset associated with a topic-partition under that consumer group.
> https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-MetadataAPI



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