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https://issues.apache.org/jira/browse/KARAF-6874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17304205#comment-17304205
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Freeman Yue Fang commented on KARAF-6874:
-----------------------------------------
This actually is an issue which should be fixed in XNIO(used by Undertow and by
OPS4J PAX-WEB).
Not actually a Karaf issue
> pax-http-undertow install causes a warning
> ------------------------------------------
>
> Key: KARAF-6874
> URL: https://issues.apache.org/jira/browse/KARAF-6874
> Project: Karaf
> Issue Type: Bug
> Components: karaf
> Affects Versions: 4.2.9
> Reporter: Gerald Kallas
> Priority: Major
>
> feature:install pax-http-undertow
>
> causes a warning
>
> {code:java}
> WARNING: An illegal reflective access operation has occurred
> WARNING: Illegal reflective access by org.xnio.nio.NioXnio$2
> (jar:bundle://126.0:0/!/) to constructor sun.nio.ch.EPollSelectorProvider()
> WARNING: Please consider reporting this to the maintainers of
> org.xnio.nio.NioXnio$2
> WARNING: Use --illegal-access=warn to enable warnings of further illegal
> reflective access operations
> WARNING: All illegal access operations will be denied in a future release
> {code}
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