[jira] [Updated] (KAFKA-2359) New consumer - partitions auto assigned only on poll

["Ray Chiang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-2359?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ray Chiang updated KAFKA-2359:
------------------------------
    Component/s: consumer

> New consumer - partitions auto assigned only on poll
> ----------------------------------------------------
>
>                 Key: KAFKA-2359
>                 URL: https://issues.apache.org/jira/browse/KAFKA-2359
>             Project: Kafka
>          Issue Type: Bug
>          Components: consumer
>    Affects Versions: 0.9.0.0
>            Reporter: Stevo Slavic
>            Priority: Minor
>
> In the new consumer I encountered unexpected behavior. After constructing {{KafkaConsumer}} instance with configured consumer rebalance callback handler, and subscribing to a topic with "consumer.subscribe(topic)", retrieving subscriptions would return empty set and callback handler would not get called (no partitions ever assigned or revoked), no matter how long instance was up.
> Then I found by inspecting {{KafkaConsumer}} code that partition assignment will only be triggered on first {{poll}}, since {{pollOnce}} has:
> {noformat}
> // ensure we have partitions assigned if we expect to
> if (subscriptions.partitionsAutoAssigned())
>     coordinator.ensurePartitionAssignment();
> {noformat}
> I'm proposing to fix this by including same {{ensurePartitionAssignment}} fragment in {{KafkaConsumer.subscriptions}} accessor as well.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)