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Date: Thu, 25 Sep 2008 01:19:45 -0700 (PDT)
From: "Amar Kamat (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-4190) Changes to JobHistory makes it
 backward incompatible
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     [ https://issues.apache.org/jira/browse/HADOOP-4190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Amar Kamat updated HADOOP-4190:
-------------------------------

    Attachment: HADOOP-4190-v6.patch

Had an off-line discussion with Devaraj. Devaraj suggested that the line delimiter would not change across versions. Hence later versions should also use '.' as the delim. Attaching a patch that incorporates these comments. 
_ant test-patch_ fails on findbugs. Didnt see any thing related to my patch. _ant test_ passed on my box.

> Changes to JobHistory makes it backward incompatible
> ----------------------------------------------------
>
>                 Key: HADOOP-4190
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4190
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>            Priority: Blocker
>             Fix For: 0.19.0
>
>         Attachments: HADOOP-4190-v3.patch, HADOOP-4190-v4.patch, HADOOP-4190-v5.patch, HADOOP-4190-v6.patch
>
>
> With HADOOP-3245, the job history format has changed. Every log line now ends with a '.' (dot). JobHistory's parser will consider a history line valid only if it ends in a dot
> Hence the new parser wont be able to parse old history files.

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