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https://issues.apache.org/jira/browse/FELIX-6429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17410387#comment-17410387
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Carsten Ziegeler commented on FELIX-6429:
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It would help to get a stack trace for the exception to better understand why
/where it is thrown
> IllegalArgumentException that should not happen
> -----------------------------------------------
>
> Key: FELIX-6429
> URL: https://issues.apache.org/jira/browse/FELIX-6429
> Project: Felix
> Issue Type: Bug
> Components: Framework
> Affects Versions: framework-7.0.0
> Reporter: Jürgen Albert
> Priority: Major
>
> We recently stumbled a couple of times over an IllegalArgumentException when
> calling ServiceObjects.ungetService. In our case we are always in an async
> process and the service we are calling unget for ist already unregistered.
> According to the org.osgi.framework.ServiceObjects Spec the Exception will be
> thrown under the following circumstances:
> {code:java}
> @throws IllegalArgumentException If the specified service object is
> {@code null} or was not provided by a {@code ServiceObjects}
> object for the associated service.
> {code}
> I can guarantee that both conditions are not meet in our case. It is simply
> that the service is already unregistered.
> If I read the javadoc correctly it should simply do nothing in such a case. I
> haven't checked with the Spec though.
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