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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, 05 Apr 2010 18:16:27 GMT

    [ https://issues.apache.org/jira/browse/CHUKWA-4?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12853475#action_12853475
] 

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

the exception will be on this line "while (seqFileReader.next(key, evt)){ seqFileWriter.append(key,
evt); } "
so you can add a 1st try/catch block around this line, then add another one around rename/delete.
Also, don't delete the .chukwa file in the first place.

Steps:
1- Rename .recover to .recoverDone
2- delete .chukwa
3- rename .recoverDone to .done

At startup time, you should:
1- delete any .recover files
2.0- if you have a .recoverDone and .chukwa with the same name, then delete the .chukwa file
(Repeat until there's no more .chukwa file that matches this rule)
2.1- Rename all .recoverDone to .done
3- process .chukwa files
4- send .done files



> 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
>
> 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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