[jira] [Commented] (FELIX-3734) MetaType: NPE in ServiceTracker for fragment bundle

["Felix Meschberger (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FELIX-3734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484006#comment-13484006 ] 

Felix Meschberger commented on FELIX-3734:
------------------------------------------

Thanks for reporting.

Looking at this a bit more in-depth, it looks like there are two issues lingering actually:

(1) The MetaTypeService.getMetaTypeInformation(Bundle) implementation should probably return null for fragments any way. Respective information provided by the fragment should be exposed through the host bundle to which the fragment binds.

(2) The MetaTypeProviderTracker should not use the MetaTypeInformation bundle's context to listen for services but the Meta Type Service implementation bundle context. Same as is done for the ServiceMetaTypeInformation listener for ManagedService[Factory] services.
                
> MetaType: NPE in ServiceTracker for fragment bundle
> ---------------------------------------------------
>
>                 Key: FELIX-3734
>                 URL: https://issues.apache.org/jira/browse/FELIX-3734
>             Project: Felix
>          Issue Type: Bug
>          Components: Metatype Service
>    Affects Versions: metatype-1.0.4
>            Reporter: Jeremias Maerki
>            Assignee: Felix Meschberger
>         Attachments: felix-metatype-npe-fix-for-fragments.diff
>
>
> An NPE occurs when calling up the "Config" page of Felix WebConsole 4.0.0 when there are fragment bundles:
> 10:20:08,839|ERROR| qtp521679231-100 | ?                                   ? | 249 | %configMgr.pluginTitle: listFactoryConfigurations: Unexpected problem encountered
> java.lang.NullPointerException
>         at org.osgi.util.tracker.ServiceTracker.<init>(ServiceTracker.java:197)[org.apache.felix.framework-4.0.3.jar:]
>         at org.osgi.util.tracker.ServiceTracker.<init>(ServiceTracker.java:268)[org.apache.felix.framework-4.0.3.jar:]
>         at org.apache.felix.metatype.internal.MetaTypeProviderTracker.<init>(MetaTypeProviderTracker.java:36)
>         at org.apache.felix.metatype.internal.MetaTypeInformationImpl.<init>(MetaTypeInformationImpl.java:74)
>         at org.apache.felix.metatype.internal.ServiceMetaTypeInformation.<init>(ServiceMetaTypeInformation.java:79)
>         at org.apache.felix.metatype.internal.MetaTypeServiceImpl.getMetaTypeInformation(MetaTypeServiceImpl.java:130)
>         at org.apache.felix.webconsole.internal.compendium.ConfigManagerBase.getObjectClassDefinitions(ConfigManagerBase.java:121)[263:org.apache.felix.webconsole:4.0.0]
>         at org.apache.felix.webconsole.internal.compendium.ConfigManagerBase.getFactoryPidObjectClasses(ConfigManagerBase.java:95)[263:org.apache.felix.webconsole:4.0.0]
>         at org.apache.felix.webconsole.internal.compendium.ConfigManager.listFactoryConfigurations(ConfigManager.java:437)[263:org.apache.felix.webconsole:4.0.0]
>         at org.apache.felix.webconsole.internal.compendium.ConfigManager.renderContent(ConfigManager.java:375)[263:org.apache.felix.webconsole:4.0.0]
>         at org.apache.felix.webconsole.AbstractWebConsolePlugin.doGet(AbstractWebConsolePlugin.java:155)[263:org.apache.felix.webconsole:4.0.0]
>         at org.apache.felix.webconsole.internal.compendium.ConfigManager.doGet(ConfigManager.java:309)[263:org.apache.felix.webconsole:4.0.0]
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)[32:org.apache.geronimo.specs.geronimo-servlet_2.5_spec:1.1.2]

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