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https://issues.apache.org/jira/browse/HIVE-3127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13399767#comment-13399767
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Edward Capriolo commented on HIVE-3127:
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Welcome to hive :) I am willing to bet we only hit the block merge if the input
is larger then hdfs blocks size, or the defaults is high and it normally does
not happen during the course of the unit tests.
> Don’t pass–hconf values as command line arguments to child 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
> Assignee: Kanna Karanam
> Labels: Windows
> Fix For: 0.10.0
>
> Attachments: HIVE-3127.1.patch.txt, HIVE-3127.2.patch.txt
>
>
> The maximum length of the DOS command string is 8191 characters (in Windows
> latest versions http://support.microsoft.com/kb/830473). This limit will be
> exceeded easily when it appends individual –hconf values to the command
> string. To work around this problem, Write all changed hconf values to a temp
> file and pass the temp file path to the child jvm to read and initialize the
> -hconf parameters from file.
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