[YARN-1100] Giving multiple commands to ContainerLaunchContext doesn't work as expected

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.1.0-beta, 2.7.2
• Component/s: api, nodemanager
• Target Version/s: 2.7.5
• Assignee: Unassigned
• Reporter: Sandy Ryza
• Created: 26/Aug/13 21:46
• Updated: 28/Jul/17 00:54

Description

A ContainerLaunchContext accepts a list of commands (as strings) to be executed to launch the container. I would expect that giving a list with the two commands "echo yolo" and "date" would print something like

yolo
Mon Aug 26 14:40:23 PDT 2013

Instead it prints

yolo date

This is because the commands get executed with:

exec /bin/bash -c "echo yolo date"

To get the expected behavior I have to include semicolons at the end of each command. At the very least, this should be documented, but I think better would be for the NM to insert the semicolons.