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From "Manikumar (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (KAFKA-3011) Consumer.poll(0) blocks if Kafka not accessible
Date Fri, 01 Jun 2018 15:23:00 GMT

     [ https://issues.apache.org/jira/browse/KAFKA-3011?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Manikumar resolved KAFKA-3011.
------------------------------
    Resolution: Fixed

This is addressed by KIP-266. 

> Consumer.poll(0) blocks if Kafka not accessible
> -----------------------------------------------
>
>                 Key: KAFKA-3011
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3011
>             Project: Kafka
>          Issue Type: Bug
>          Components: clients
>    Affects Versions: 0.9.0.0
>         Environment: all
>            Reporter: Eric Bowman
>            Priority: Major
>
> Because of this loop in ConsumerNetworkClient:
> {code:java}
>     public void awaitMetadataUpdate() {
>         int version = this.metadata.requestUpdate();
>         do {
>             poll(Long.MAX_VALUE);
>         } while (this.metadata.version() == version);
>     }
> {code}
> ...if Kafka is not reachable (perhaps not running, or other network issues, unclear),
then KafkaConsumer.poll(0) will block until it's available.
> I suspect that better behavior would be an exception



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