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https://issues.apache.org/jira/browse/KARAF-4700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16237680#comment-16237680
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Laszlo Papp commented on KARAF-4700:
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Thank you for the workaround and fix.
> Overrides and blacklist do not work by default and produce an exception
> -----------------------------------------------------------------------
>
> Key: KARAF-4700
> URL: https://issues.apache.org/jira/browse/KARAF-4700
> Project: Karaf
> Issue Type: Bug
> Reporter: Fabian Lange
> Assignee: Guillaume Nodet
> Priority: Major
> Fix For: 4.1.0
>
>
> The FeaturesServiceImpl supports overrides and blacklist.
> They are configured in the Activator:
> https://github.com/apache/karaf/blob/791ebb5f908e27fa389616c8bba456cf85807f4d/features/core/src/main/java/org/apache/karaf/features/internal/osgi/Activator.java#L175
> If not configured they will default to a file which is not existing in the
> distribution by default:
> String overrides = getString("overrides", new
> File(System.getProperty("karaf.etc"),
> "overrides.properties").toURI().toString());
> String blacklisted = getString("blacklisted", new
> File(System.getProperty("karaf.etc"),
> "blacklisted.properties").toURI().toString());
> This causes Exceptions later down the line, e.g. here:
> https://github.com/apache/karaf/blob/b8c2617c278bb899c0af2ea1a8d2dc987f22f1cb/features/core/src/main/java/org/apache/karaf/features/internal/service/Overrides.java#L116
> The code is guarded with a null check, so there has been a possibility not to
> use the blacklist or override feature at all by providing them as "null".
> but the way these properties are read, they never can be null, they either
> refer to a file the user configured or to the default file.
> It would be great if it would be possible to turn the feature off some how.
> the best workaround right now is to add empty files, which will at least
> prevent the file not found exception, but it is still unnecessary file io
> (which admittedly is a minor concern)
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