Allen Wittenauer created HADOOP-13341:
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Summary: Deprecate HADOOP_SERVERNAME_OPT; replace with
HADOOP_(command)_OPT
Key: HADOOP-13341
URL: https://issues.apache.org/jira/browse/HADOOP-13341
Project: Hadoop Common
Issue Type: Improvement
Components: scripts
Affects Versions: 3.0.0-alpha1
Reporter: Allen Wittenauer
Big features like YARN-2928 demonstrate that even senior level Hadoop
developers forget that daemons need a custom _OPT env var. We can replace all
of the custom vars with generic handling just like we do for the username check.
For example, today:
HADOOP_NAMENODE_OPT
would become
HADOOP_namenode_OPT
But if I wanted custom distcp options, there is no equivalent. But if the
command replacement mode was, then
HADOOP_distcp_OPT
would automatically work.
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