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https://issues.apache.org/jira/browse/SYSTEMML-495?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Dusenberry closed SYSTEMML-495.
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> Simplify SystemML Configuration Loading
> ---------------------------------------
>
> Key: SYSTEMML-495
> URL: https://issues.apache.org/jira/browse/SYSTEMML-495
> Project: SystemML
> Issue Type: Improvement
> Reporter: Mike Dusenberry
> Assignee: Mike Dusenberry
> Priority: Minor
>
> Currently, SystemML always looks for a configuration file in a default
> location (in the current directory), and will always emit a warning if it is
> not found. Additionally, SystemML allows a user to supply a configuration
> file location. In this latter case, SystemML will still attempt to read the
> default configuration file, emitting a warning if it is not present (which
> causes confusion), as well as the user-supplied file. If both are loaded,
> the user-supplied file will be merged into the default configuration with an
> overwrite strategy.
> Always looking for a default file, even when a file is explicitly supplied,
> causes confusion, and may create unintended side effects. If a user
> explicitly supplies a configuration file, we should simply use that file,
> rather than attempting to also read an additional default file at the same
> time. In order to provide backwards compatibility, if the user does not
> supply a file, then we should fall back to the default file location. If
> that file is also not found, we should then fall back to the internal
> defaults.
> Additionally, in order to supply an additional configuration file, the
> {{-config=path/to/file}} flag has to be used, and it only works with the
> equals sign {{=}} present, which is unlike all other flags that use spaces.
> Instead, we should support {{-config path/to/file}}.
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