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https://issues.apache.org/jira/browse/FELIX-2901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017082#comment-13017082
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Richard S. Hall commented on FELIX-2901:
----------------------------------------
Example NPE:
! stop 0
g! ERROR: Bundle host [6] Error detaching fragments.
(java.lang.NullPointerException)
java.lang.NullPointerException
at java.util.ArrayList.<init>(ArrayList.java:131)
at
org.apache.felix.framework.ModuleImpl.attachFragments(ModuleImpl.java:1183)
at
org.apache.felix.framework.BundleImpl.closeModules(BundleImpl.java:138)
at org.apache.felix.framework.BundleImpl.close(BundleImpl.java:101)
at
org.apache.felix.framework.Felix$SystemBundleActivator.stop(Felix.java:4593)
at
org.apache.felix.framework.util.SecureAction.stopActivator(SecureAction.java:651)
at org.apache.felix.framework.Felix.stopBundle(Felix.java:2226)
at org.apache.felix.framework.Felix$3.run(Felix.java:876)
at java.lang.Thread.run(Thread.java:680)
> [Framework] NPE from a host bundle during framework shutdown
> ------------------------------------------------------------
>
> Key: FELIX-2901
> URL: https://issues.apache.org/jira/browse/FELIX-2901
> Project: Felix
> Issue Type: Bug
> Components: Framework
> Affects Versions: framework-3.2.0
> Reporter: Richard S. Hall
> Assignee: Richard S. Hall
> Priority: Minor
> Fix For: framework-4.0.0
>
>
> When shutting down the framework, if a fragment is released before its host
> bundle, an NPE results because the host is trying to remove itself from the
> fragment's wires, but the fragment no longer has any wires. This is likely an
> issue any time when a fragment is refreshed before the host. I think we just
> need a null check here. In 3.0.x this wasn't an issue because we didn't use
> wires in the fragment to keep track of host dependencies.
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