Allen Wittenauer created HADOOP-12650:
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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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