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From "Jerome Boulon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CHUKWA-4) Collectors don't finish writing .done datasink from last .chukwa datasink when stopped using bin/stop-collectors
Date Mon, 03 May 2010 22:18:56 GMT

    [ https://issues.apache.org/jira/browse/CHUKWA-4?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12863543#action_12863543
] 

Jerome Boulon commented on CHUKWA-4:
------------------------------------

Issue with HDFS writers is more complecated thant it looks like since everybody can see the
same file at any given time. So extra steps need to be done to avoid duplicating data in a
distributed env and therefore this needs to be done in a separate Jira.
/Jerome. 

> Collectors don't finish writing .done datasink from last .chukwa datasink when stopped
using bin/stop-collectors
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: CHUKWA-4
>                 URL: https://issues.apache.org/jira/browse/CHUKWA-4
>             Project: Hadoop Chukwa
>          Issue Type: Bug
>          Components: data collection
>         Environment: I am running on our local cluster. This is a linux machine that
I also run Hadoop cluster from.
>            Reporter: Andy Konwinski
>            Priority: Minor
>         Attachments: CHUKWA-4.2.patch, CHUKWA-4.patch
>
>
> When I use start-collectors, it creates the datasink as expected, writes to it as per
normal, i.e. writes to the .chukwa file, and roll overs work fine when it renames the .chukwa
file to .done. However, when I use bin/stop-collectors to shut down the running collector
it leaves a .chukwa file in the HDFS file system. Not sure if this is a valid sink or not,
but I think that the collector should gracefully clean up the datasink and rename it .done
before exiting.

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