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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-1100) Giving multiple commands to ContainerLaunchContext doesn't work as expected
Date Mon, 26 Aug 2013 21:47:52 GMT
Sandy Ryza created YARN-1100:
--------------------------------

             Summary: Giving multiple commands to ContainerLaunchContext doesn't work as expected
                 Key: YARN-1100
                 URL: https://issues.apache.org/jira/browse/YARN-1100
             Project: Hadoop YARN
          Issue Type: Bug
          Components: api, nodemanager
    Affects Versions: 2.1.0-beta
            Reporter: Sandy Ryza


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
{code}
yolo
Mon Aug 26 14:40:23 PDT 2013
{code}

Instead it prints
{code}
yolo date
{code}

This is because the commands get executed with:
{code}
exec /bin/bash -c "echo yolo date"
{code}

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.

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