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https://issues.apache.org/jira/browse/GEODE-9468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17388307#comment-17388307
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Darrel Schneider commented on GEODE-9468:
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The tomcat 7, 8, and 9 source code we bundle also has a call to setAccessible
in org.apache.geode.modules.session.catalina.Tomcat9CommitSessionValve so even
if we fix DeltaSession ifTomcat9CommitSessionValve is used it will also fail on
java 16.
> tomcat session state management will not work on java 16
> --------------------------------------------------------
>
> Key: GEODE-9468
> URL: https://issues.apache.org/jira/browse/GEODE-9468
> Project: Geode
> Issue Type: Bug
> Components: http session
> Reporter: Darrel Schneider
> Priority: Major
> Labels: Java16
>
> The class org.apache.geode.modules.session.catalina.DeltaSession calls
> Field.setAccessible in a static block. It is getting access to a field in the
> super class which was private in tomcat 7 (see GEODE-3434). Because of this
> tomcat session state management will not work on java 16 (see
> [https://softwaregarden.dev/en/posts/new-java/illegal-access-in-java-16/)]
> unless jvm args are used to permit the call (for example
> "--illegal-access=permit").
> If we can drop support for tomcat 7 then this reflection would no longer be
> needed. It might also be possible to only call setAccessible if the field is
> private which would mean only tomcat 7 would not work on java 16.
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