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From "Jay Kreps (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-756) Processor thread blocks due to infinite loop during fetch response send
Date Tue, 12 Feb 2013 04:03:12 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13576357#comment-13576357
] 

Jay Kreps commented on KAFKA-756:
---------------------------------

I don't understand the intention of the mutlisend change. Can you give a little background...?

The one change seems to remove a while loop, the other adds one...

Also, did you do any testing on this?
                
> Processor thread blocks due to infinite loop during fetch response send
> -----------------------------------------------------------------------
>
>                 Key: KAFKA-756
>                 URL: https://issues.apache.org/jira/browse/KAFKA-756
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.8
>            Reporter: Sriram Subramanian
>            Assignee: Sriram Subramanian
>            Priority: Blocker
>              Labels: bugs, p1
>         Attachments: KAFKA-756.patch, Kafka-756-v2.patch
>
>
> This looks to be because of an infinite loop during fetch response send. This happens
because we try to send bytes from a log which has been truncated during send. The total size
to send is calculated at the beginning of the iteration and it does not take into account
the change in log size during send. When send happens, it uses the size calculated at the
start and loops continuously hoping to send more data.

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