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Date: Mon, 18 Jun 2012 05:01:43 +0000 (UTC)
From: "Kanna Karanam (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
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Subject: =?utf-8?Q?[jira]_[Commented]_(HIVE-3127)_Don=E2=80=99t?=
 =?utf-8?Q?_pass=E2=80=93hconf_values_as_command_line_ar?=
 =?utf-8?Q?guments_to_child_JVM_to_avoid_command?=
 =?utf-8?Q?_line_exceeding_char_limit_on_windows?=
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    [ https://issues.apache.org/jira/browse/HIVE-3127?page=3Dcom.atlassian.=
jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D13393=
667#comment-13393667 ]=20

Kanna Karanam commented on HIVE-3127:
-------------------------------------

Thanks Edward, I thought of removing the arguments option completely, but I=
 felt that it can introduce a small perf hit on Linux unnecessarily as we a=
re creating/deleting a temp files for every task execution. If we feel that=
 this perf hit is negligible then I will remove the arguments option.
Thanks

               =20
> Don=E2=80=99t pass=E2=80=93hconf values as command line arguments to chil=
d JVM to avoid command line exceeding char limit on windows
> -------------------------------------------------------------------------=
-------------------------------------------
>
>                 Key: HIVE-3127
>                 URL: https://issues.apache.org/jira/browse/HIVE-3127
>             Project: Hive
>          Issue Type: Bug
>          Components: Configuration, Windows
>    Affects Versions: 0.9.0, 0.10.0, 0.9.1
>            Reporter: Kanna Karanam
>              Labels: Windows
>             Fix For: 0.10.0
>
>         Attachments: HIVE-3127.1.patch.txt
>
>
> The maximum length of the DOS command string is 8191 characters (in Windo=
ws latest versions http://support.microsoft.com/kb/830473). This limit will=
 be exceeded easily when it appends individual =E2=80=93hconf values to the=
 command string. To work around this problem, Write all changed hconf value=
s to a temp file and pass the temp file path to the child jvm to read and i=
nitialize the -hconf parameters from file.

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