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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-12650) Document all of the secret env vars
Date Wed, 16 Dec 2015 13:50:46 GMT
Allen Wittenauer created HADOOP-12650:

             Summary: Document all of the secret env vars
                 Key: HADOOP-12650
                 URL: https://issues.apache.org/jira/browse/HADOOP-12650
             Project: Hadoop Common
          Issue Type: Bug
          Components: scripts
    Affects Versions: 3.0.0
            Reporter: Allen Wittenauer
            Priority: Blocker

Over the years, developers have added all kinds of magical environment variables in the Java
code without any concern or thought about either a) documenting them or b) whether they are
already used by something else.  We need to update at least hadoop-env.sh to contain a list
of these env vars so that end users know that they are either private/unsafe and/or how they
can be used.

Just one of many examples: HADOOP_JAAS_DEBUG.

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