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https://issues.apache.org/jira/browse/KARAF-5440?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jean-Baptiste Onofré resolved KARAF-5440.
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Resolution: Fixed
> No override facility for properties in system.properties
> --------------------------------------------------------
>
> Key: KARAF-5440
> URL: https://issues.apache.org/jira/browse/KARAF-5440
> Project: Karaf
> Issue Type: Bug
> Components: karaf-core
> Reporter: Tom Quarendon
> Assignee: Jean-Baptiste Onofré
> Priority: Minor
> Fix For: 4.2.0, 4.1.3
>
>
> There are two properties files in karaf that give global properties of
> various kinds, system.properties and config.properties.
> The "config.properties" file has a facility to override properties within it
> by putting values in the "custom.properties" file. We use this to tweak
> certain values in out custom distribution.
> There's no such facility though for the "system.properties" file.
> At the moment we therefore hold a copy of the whole system.properties file
> with a couple of modifications and include that in our distribution. This is
> fragile though. For example, recently one of the properties was changes by a
> commit to karaf and it took me a while to work out why things suddenly
> started behaving differently (this isn't a criticism, I'm just pointing out
> the fragility, in case it wasn't clear).
> It looks like there wouldn't be any particular reason why this couldn't be
> done by org.apache.karaf.util.config.PropertiesLoader. I'm happy to provide a
> pull request for consideration. I would have suggested having an ${optionals}
> line in the system.properties file that would load a file called, say,
> custom.system.properties. I would have just replaced the code to load the
> properties in loadSystemProperties with a call to loadPropertiesFile.
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