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From J. Brébec (JIRA) <j...@apache.org>
Subject [jira] [Created] (KARAF-5371) Race condition between FeatureService and Fileinstall
Date Tue, 12 Sep 2017 14:33:00 GMT
J. Brébec created KARAF-5371:
--------------------------------

             Summary: Race condition between FeatureService and Fileinstall
                 Key: KARAF-5371
                 URL: https://issues.apache.org/jira/browse/KARAF-5371
             Project: Karaf
          Issue Type: Bug
          Components: karaf-feature
    Affects Versions: 4.1.2
            Reporter: J. Brébec
            Priority: Critical


If a bundle is installed when the FeatureService is started, then it is possible that this
bundle is not associated to the default region. as a consequence, every services exported
by this bundle are not visible from the osgi container, until karaf is restarted.

A real usecase :
- A new karaf distribution, with a blueprint file in a folder managed by fileinstall ;
- When the distribution is started, as fileinstall is started before the feature bundle, and
the folder are watched asynchronously, the blueprint file is installed before or in the same
time the featureservice is started
=> the services exported by the blueprint file are not visible

This race condition is located in the FeatureService activator : the digraph is loaded, and
every bundle not known are added to the default region. then, it subscribes a bundle-listener
: If a bundle X is installed between the digraph loading and the subscription of the bundle
listener, then this bundle X is not attached to the default region.

On my machine, this issue happens 70% of the time on a cold start.



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