[
https://issues.apache.org/jira/browse/KARAF-6074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16809582#comment-16809582
]
Grzegorz Grzybek commented on KARAF-6074:
-----------------------------------------
[~j3rem1e] thanks - yes, that's what I was thinking about too. I'll just
breakpoint inside pax-url-aether service registration and I should be able to
reproduce.
> Race condition between the FeaturesService and FeatureDeploymentListener
> ------------------------------------------------------------------------
>
> Key: KARAF-6074
> URL: https://issues.apache.org/jira/browse/KARAF-6074
> Project: Karaf
> Issue Type: Bug
> Components: karaf
> Affects Versions: 4.2.2, 4.2.4
> Environment: Karaf 4.2.2 Windows 7 and Equinox
> Reporter: J. Brébec
> Assignee: Grzegorz Grzybek
> Priority: Critical
> Fix For: 4.2.3
>
>
> On the first start of a custom Karaf container (4.2.2), the logs shows a log
> of NPE in FeatureDeploymentListener.
> After some analysis of this Exception, it's look like a race condition
> between the FeaturesService and the FeatureDeploymentListener :
> # The FeaturesService starts and launch a provisioning in another thread
> # a FeatureDeploymentListener is registered, and call bundleChanged for
> every bundle installed (the startup bundles)
> # It calls FeaturesService.state.requirements and get an empty map
> # Updating the root regions in the requirements map fails with an NPE
> # Some times later, the deployment task launched at step 1 is started, and
> FeaturesService.saveState() is called : state.requirements."root region" is
> initialised
> The step 5 is executed in another thread, so it can happens before step 2
> (and it works) or after, causing this NPE
> Moreover, some methods in FeaturesService assume that
> state.requirements."root region" exists. There are probably others npe here.
>
> {code:java}
> 14:37:55.668 ERROR [activator-1-thread-2] Unable to update deployed features
> for bundle: org.eclipse.osgi - 3.12.100.v20180210-1608
> java.lang.NullPointerException: null
> at
> org.apache.karaf.deployer.features.FeatureDeploymentListener.bundleChanged(FeatureDeploymentListener.java:247)
> [25:org.apache.karaf.deployer.features:4.2.2]
> at
> org.apache.karaf.deployer.features.FeatureDeploymentListener.init(FeatureDeploymentListener.java:95)
> [25:org.apache.karaf.deployer.features:4.2.2]
> at
> org.apache.karaf.deployer.features.osgi.Activator.doStart(Activator.java:52)
> [25:org.apache.karaf.deployer.features:4.2.2]
> at org.apache.karaf.util.tracker.BaseActivator.run(BaseActivator.java:292)
> [25:org.apache.karaf.deployer.features:4.2.2]
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> [?:?]
> at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:?]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> [?:?]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> [?:?]{code}
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
