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https://issues.apache.org/jira/browse/GERONIMO-6279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13294061#comment-13294061
 ] 

Forrest Xia commented on GERONIMO-6279:
---------------------------------------

Is it reproducible on the latest 3.0-beta build?
                
> NPE related with GBeanInstance happened when excuting karaf features 
> uninstall command
> --------------------------------------------------------------------------------------
>
>                 Key: GERONIMO-6279
>                 URL: https://issues.apache.org/jira/browse/GERONIMO-6279
>             Project: Geronimo
>          Issue Type: Bug
>      Security Level: public(Regular issues) 
>          Components: commands
>    Affects Versions: 3.0-beta-1
>         Environment: IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux 
> amd64-64 jvmxa6460sr10-20111207_96808 (JIT enabled, AOT enabled)
>            Reporter: Tina Li
>            Priority: Minor
>
> 1.Start the server using command: ./geronimo run
> 2.Execute the command: geronimo> features:list
> 3.Execute the command: geronimo>features:install obr successfully after fixed 
> by geronimo-6278
> 4.Excute the command: geronimo>features:uninstall,although command executed 
> successfully but error  appeared:
> geronimo> features:uninstall  obr
> 2012-02-17 21:06:44,088 ERROR [GBeanInstance] Problem in doStop of 
> org.apache.geronimo.framework/j2ee-system/3.0-beta-2-SNAPSHOT/car?ServiceModule=org.apache.geronimo.framework/j2ee-system/3.0-beta-2-SNAPSHOT/car,j2eeType=GBean,name=GeronimoOBR
> java.lang.NullPointerException: A null service reference is not allowed.
>       at 
> org.eclipse.osgi.framework.internal.core.BundleContextImpl.getService(BundleContextImpl.java:586)
>       at 
> org.apache.geronimo.obr.GeronimoOBRGBean.unregisterRepositories(GeronimoOBRGBean.java:228)
>       at 
> org.apache.geronimo.obr.GeronimoOBRGBean.doStop(GeronimoOBRGBean.java:245)
>       at 
> org.apache.geronimo.gbean.runtime.GBeanInstance.destroyInstance(GBeanInstance.java:1191)
>       at 
> org.apache.geronimo.gbean.runtime.GBeanInstanceState.attemptFullStop(GBeanInstanceState.java:346)
>       at 
> org.apache.geronimo.gbean.runtime.GBeanInstanceState.stop(GBeanInstanceState.java:191)
>       at 
> org.apache.geronimo.gbean.runtime.GBeanInstance.stop(GBeanInstance.java:577)
>       at 
> org.apache.geronimo.kernel.basic.BasicKernel.stopGBean(BasicKernel.java:430)
>       at 
> org.apache.geronimo.gbean.runtime.GBeanInstanceState.stop(GBeanInstanceState.java:183)
>       at 
> org.apache.geronimo.gbean.runtime.GBeanInstance.stop(GBeanInstance.java:577)
>       at 
> org.apache.geronimo.kernel.basic.BasicKernel.stopGBean(BasicKernel.java:430)
>       at 
> org.apache.geronimo.kernel.config.KernelConfigurationManager$ShutdownHook.run(KernelConfigurationManager.java:381)
>       at 
> org.apache.geronimo.kernel.basic.BasicKernel.notifyShutdownHooks(BasicKernel.java:671)
>       at 
> org.apache.geronimo.kernel.basic.BasicKernel.shutdown(BasicKernel.java:648)
>       at 
> org.apache.geronimo.system.osgi.BootActivator.stop(BootActivator.java:92)
>       at 
> org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:771)
>       at 
> java.security.AccessController.doPrivileged(AccessController.java:251)
>       at 
> org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:764)
>       at 
> org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:510)
>       at 
> org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:565)
>       at 
> org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1161)
>       at 
> org.eclipse.osgi.framework.internal.core.PackageAdminImpl.suspendBundle(PackageAdminImpl.java:327)
>       at 
> org.eclipse.osgi.framework.internal.core.PackageAdminImpl.processDelta(PackageAdminImpl.java:468)
>       at 
> org.eclipse.osgi.framework.internal.core.PackageAdminImpl.doResolveBundles(PackageAdminImpl.java:253)
>       at 
> org.eclipse.osgi.framework.internal.core.PackageAdminImpl$1.run(PackageAdminImpl.java:173)
>       at java.lang.Thread.run(Thread.java:736)

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