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https://issues.apache.org/jira/browse/HADOOP-13341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer updated HADOOP-13341:
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Summary: Deprecate HADOOP_SERVERNAME_OPTS; replace with
(command)_(subcommand)_OPTS (was: Deprecate HADOOP_SERVERNAME_OPTS; replace
with HADOOP_(subcommand)_OPTS)
> Deprecate HADOOP_SERVERNAME_OPTS; replace with (command)_(subcommand)_OPTS
> --------------------------------------------------------------------------
>
> 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
> Assignee: Allen Wittenauer
>
> Big features like YARN-2928 demonstrate that even senior level Hadoop
> developers forget that daemons need a custom _OPTS env var. We can replace
> all of the custom vars with generic handling just like we do for the username
> check.
> For example, with generic handling in place:
> || Old Var || New Var ||
> | HADOOP_NAMENODE_OPTS | HDFS_namenode_OPTS |
> | YARN_RESOURCEMANAGER_OPTS | YARN_resourcemanager_OPTS |
> | n/a | YARN_timelineserverreader_OPTS |
> | n/a | HADOOP_distcp_OPTS |
> | n/a | MAPRED_distcp_OPTS |
> This makes it:
> a) consistent across the entire project
> b) consistent for every subcommand
> c) eliminates almost all of the custom appending in the case statements
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