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From "Domenico Di Giulio (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Deleted] (KAFKA-5016) Consumer hang in poll method while rebalancing is in progress
Date Mon, 10 Apr 2017 20:37:41 GMT

     [ https://issues.apache.org/jira/browse/KAFKA-5016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Domenico Di Giulio updated KAFKA-5016:
    Comment: was deleted

(was: I am currently out of the office, with limited access to my e-mail.
I will be back at work on April 19.

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> Consumer hang in poll method while rebalancing is in progress
> -------------------------------------------------------------
>                 Key: KAFKA-5016
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5016
>             Project: Kafka
>          Issue Type: Bug
>          Components: core
>    Affects Versions:,
>            Reporter: Domenico Di Giulio
>            Assignee: Vahid Hashemian
>         Attachments: Kafka Issue (TRACE) - Server + Client.txt, Kafka
Issue (TRACE).txt
> After moving to Kafka, it looks like I'm experiencing a hang in the rebalancing
> This is a test case, not (still) production code. It does the following with a single-partition
topic and two consumers in the same group:
> 1) a topic with one partition is forced to be created (auto-created)
> 2) a producer is used to write 10 messages
> 3) the first consumer reads all the messages and commits
> 4) the second consumer attempts a poll() and hangs indefinitely
> The same issue can't be found with
> See the attached logs at TRACE level. Look for "SERVER HANGS" to see where the hang is
found: when this happens, the client keeps failing any hearbeat attempt, as the rebalancing
is in progress, and the poll method hangs indefinitely.

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