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https://issues.apache.org/jira/browse/HIVE-3127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13400949#comment-13400949
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Edward Capriolo commented on HIVE-3127:
---------------------------------------
So I have found a reference to BlockMergeTask in
./ql/src/java/org/apache/hadoop/hive/ql/exec/TaskFactory.java .
Also the last release note was. ./build/dist/RELEASE_NOTES.txt: *
[HIVE-2413] - BlockMergeTask ignores client-specified jars
vi ./ql/src/java/org/apache/hadoop/hive/ql/io/rcfile/merge/BlockMergeTask.java
You could be correct in that the main is unreachable now. Maybe someone added
it as a hack for direct testing, it would be good to cut-it from the code if it
is not reachable. Maybe one of the other devs will chime in.
If not one else has any insight I will review and +1 tomorrow.
> 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,
> HIVE-3127.3.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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