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Date: Tue, 7 Oct 2014 17:53:36 +0000 (UTC)
From: "Chris Nauroth (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <JIRA.12539036.1327006479000.209897.1412704416034@Atlassian.JIRA>
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Subject: [jira] [Commented] (HADOOP-7984) Add hadoop --loglevel option to
 change log level
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    [ https://issues.apache.org/jira/browse/HADOOP-7984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14162191#comment-14162191 ] 

Chris Nauroth commented on HADOOP-7984:
---------------------------------------

Nice work, Akira!  I tested patch v4, calling all 4 main entry points, with and without a --loglevel option.  I did find one more spot that needs a change.  In yarn-env.cmd, we have this code:

{code}
if not defined YARN_ROOT_LOGGER (
  set YARN_ROOT_LOGGER=INFO,console
)
{code}

It needs to be changed to this:

{code}
if not defined YARN_ROOT_LOGGER (
  set YARN_ROOT_LOGGER=%HADOOP_LOGLEVEL%,console
)
{code}

I'm +1 for the trunk patch after that small change.  However, I should mention that I didn't review the bash changes.  [~aw], are you ready to +1 on the bash side, or do you have more feedback?

After a branch-2 patch is available, I'd like to retest there.

> Add hadoop --loglevel option to change log level
> ------------------------------------------------
>
>                 Key: HADOOP-7984
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7984
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: scripts
>            Reporter: Eli Collins
>            Assignee: Akira AJISAKA
>            Priority: Minor
>              Labels: newbie
>         Attachments: HADOOP-7984-branch-2.patch, HADOOP-7984.3.patch, HADOOP-7984.4.patch, HADOOP-7984.patch, HADOOP-7984.patch
>
>
> It would be helpful if bin/hadoop had --loglevel option to change the log level. Currently users need to set an env variable or prefix the command (eg "HADOOP_ROOT_LOGGER=DEBUG,console hadoop distcp") which isn't very user friendly.


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