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From "Yasser Zamani (JIRA)" <>
Subject [jira] [Commented] (WW-5031) OGNL: An illegal reflective access operation has occurred
Date Sat, 25 May 2019 10:32:00 GMT


Yasser Zamani commented on WW-5031:

Thanks [~flyingfischer] for reporting this issue!

Yes it seems those logs are at Struts and OGNL side rather than your app - I ran Struts tests
with {{--illegal-access=deny}} and there are 13 failures and 17 errors (almost all of them
are with tags e.g. {{select}} tag). We should fix them when we found some time or when we
upgraded to a JDK version that doesn't allow it any more.

P.S. {{--illegal-access=debug}} is also interesting: This mode is identical to warn except
that both a warning message and a stack trace are issued for each illegal reflective-access

> OGNL: An illegal reflective access operation has occurred
> ---------------------------------------------------------
>                 Key: WW-5031
>                 URL:
>             Project: Struts 2
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.5.20
>         Environment: Java 11 / Linux / test environment on eclipse / Tomcat 8.5
>            Reporter: Markus Fischer
>            Priority: Minor
>             Fix For: 2.5.21, 2.6
> Running Struts on Java 11 gives a new warning about illegal reflection, not present on
Java 8:
> WARNING: An illegal reflective access operation has occurred
>  WARNING: Illegal reflective access by ognl.OgnlRuntime ([file:/.../workspace/.../.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/.../WEB-INF/lib/ognl-3.1.21.jar|file:///.../workspace/SC/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/.../WEB-INF/lib/ognl-3.1.21.jar])
to method java.util.HashMap$Node.getKey()
>  WARNING: Please consider reporting this to the maintainers of ognl.OgnlRuntime
>  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
> The warning appears after using the following tag in a JSP (name of properties changed):
> <s:select name="item" key="item.key" list="items" />
> The corresponding Action contains:
> private Map<Long, String> items = new LinkedHashMap<>();

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