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https://issues.apache.org/jira/browse/HADOOP-11464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14266757#comment-14266757
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Chris Nauroth commented on HADOOP-11464:
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Prior to the Windows compatibility work, there were 2 main use cases for Cygwin
in Hadoop: 1) as a Linux emulation layer and 2) as an alternative shell for
launching commands. We learned that #1 cannot work, at least not completely.
We really needed native code calls into the Windows API to achieve the
semantics required of the Hadoop code. Based on that, we dropped Cygwin
support. However, perhaps we were too hasty in eliminating support for #2.
For example, some users really would like to run a Cygwin bash shell to launch
MapReduce jobs. We can make that work easily with a small patch on the bash
scripts.
> Reinstate support for launching Hadoop processes on Windows using Cygwin.
> -------------------------------------------------------------------------
>
> Key: HADOOP-11464
> URL: https://issues.apache.org/jira/browse/HADOOP-11464
> Project: Hadoop Common
> Issue Type: Bug
> Components: bin
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
>
> The Windows compatibility work removed the dependency on Cygwin as a
> compatibility layer. However, some users may still wish to run Cygwin on a
> personal machine for running Hadoop commands that interact with a cluster.
> This issue proposes to reinstate support for launching Hadoop processes on
> Windows using Cygwin to call the bash scripts.
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