[HADOOP-11464] Reinstate support for launching Hadoop processes on Windows using Cygwin.

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.7.0
• Component/s: bin
• Target Version/s: 2.7.0
• Hadoop Flags: Reviewed
• Release Note: We have reinstated support for launching Hadoop processes on Windows by using Cygwin to run the shell scripts. All processes still must have access to the native components: hadoop.dll and winutils.exe.
• Assignee: Chris Nauroth
• Reporter: Chris Nauroth
• Created: 06/Jan/15 20:56
• Updated: 30/Sep/15 18:25
• Resolved: 09/Jan/15 23:04

Description

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.

Issue Links

• breaks: HADOOP-12451 [Branch-2] Setting HADOOP_HOME explicitly should be allowed
• breaks: HADOOP-11966 Variable cygwin is undefined in hadoop-config.sh when executed through hadoop-daemon.sh.
• is related to: HADOOP-12116 Fix unrecommended syntax usages in hadoop/hdfs/yarn script for cygwin in branch-2
• relates to: HADOOP-10049 2.1.0 beta won't run under cygwin?
• relates to: HADOOP-10133 winutils detection on windows-cygwin fails
• relates to: HADOOP-10217 Unable to run 'hadoop' commands, after installing on Cygwin
• relates to: HADOOP-10319 Unable to run Hadoop (2.2.0) commands on Cygwin (2.831) on Windows XP 3