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https://issues.apache.org/jira/browse/ARIES-1979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17087184#comment-17087184
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Veselin commented on ARIES-1979:
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Is a lock in ServiceTuple that prevents the call of getService() while
refresh() is being called the correct solution for the problem or is there a
better approach?
> NPE while refreshing chain
> --------------------------
>
> Key: ARIES-1979
> URL: https://issues.apache.org/jira/browse/ARIES-1979
> Project: Aries
> Issue Type: Bug
> Components: jax-rs-whiteboard
> Affects Versions: jax-rs-whiteboard-1.0.4
> Reporter: Veselin
> Priority: Major
> Labels: NullPointerException
> Attachments: stacktrace.txt
>
>
> I get a NullPointerException when registering some chain filters or
> endpoints. I could trace the problem back to the refresh() method of
> ServiceTuple. After the AtomicReference _service is set to null and before
> the new value is set later on, a call to getService() occurs in another
> thread which causes the NPE.
> This leads to the problem that a filter in my chain filter is being skipped
> sometimes while the my application starts which causes bugs.
>
> P.S. I had to change the code a bit to get the stack trace. It seems the
> logging in Whiteboard:895 can be improved a bit to log stack traces.
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