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Date: Wed, 10 Jul 2013 21:03:48 +0000 (UTC)
From: "Chuan Liu (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Message-ID: <JIRA.12595956.1340736791000.28436.1373490228738@arcas>
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References: <JIRA.12595956.1340736791000@arcas>
Subject: [jira] [Updated] (MAPREDUCE-4374) Fix child task environment
 variable config and add support for Windows
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     [ https://issues.apache.org/jira/browse/MAPREDUCE-4374?page=3Dcom.atla=
ssian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chuan Liu updated MAPREDUCE-4374:
---------------------------------

    Attachment: MAPREDUCE-4374-trunk.3.patch

Thanks for the suggestion, Chris! Attaching a new patch moving {{Pattern#co=
mpile}} out of for loop.
               =20
> Fix child task environment variable config and add support for Windows
> ----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4374
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4374
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 3.0.0, 1-win, 2.1.0-beta
>            Reporter: Chuan Liu
>            Assignee: Chuan Liu
>            Priority: Minor
>             Fix For: 1-win
>
>         Attachments: MAPREDUCE-4374-branch-1-win-2.patch, MAPREDUCE-4374-=
branch-1-win.patch, MAPREDUCE-4374-trunk.2.patch, MAPREDUCE-4374-trunk.3.pa=
tch, MAPREDUCE-4374-trunk.patch
>
>
> In HADOOP-2838, a new feature was introduced to set environment variables=
 via the Hadoop config 'mapred.child.env' for child tasks. There are some f=
urther fixes and improvements around this feature, e.g. HADOOP-5981 were a =
bug fix; MAPREDUCE-478 broke the config into 'mapred.map.child.env' and 'ma=
pred.reduce.child.env'.  However the current implementation is still not co=
mplete. It does not match its documentation or original intend as I believe=
. Also, by using =E2=80=98:=E2=80=99 (colon) and =E2=80=98;=E2=80=99 (semic=
olon) in the configuration syntax, we will have problems using them on Wind=
ows because =E2=80=98:=E2=80=99 appears very often in Windows path as in =
=E2=80=9CC:\=E2=80=9D, and environment variables are used very often to hol=
d path names. The Jira is created to fix the problem and provide support on=
 Windows.

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