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https://issues.apache.org/jira/browse/ARIES-1724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Watson resolved ARIES-1724.
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Resolution: Fixed
> Proxy generates calls to static methods in <clinit> which can fail on Java 9
> ----------------------------------------------------------------------------
>
> Key: ARIES-1724
> URL: https://issues.apache.org/jira/browse/ARIES-1724
> Project: Aries
> Issue Type: Bug
> Components: Proxy
> Environment: Java 9
> Reporter: Thomas Watson
> Assignee: Thomas Watson
>
> The issue is that the JVMS was changed in Java 9 to disallow "final" fields
> from being modified outside of the <clinit> method. Even other methods
> called by <clinit>.
> "if the field is final the instruction must occur in the < clinit > method of
> the current class. Otherwise, an IllegalAccessError is thrown."
> The issue here is that aires generates method proxies that stores references
> to the generated methods in 'private static final' fields, which it then
> assigns in woven static init weaving code by calling another generated static
> method.
> It seems that we can trivially fix this by removing the 'final' modifier of
> the generated method field.
> Here is what the current generated code would looking as a java class:
> {code:title=Foo.java|borderStyle=solid}
> public class Foo {
> static final boolean bar;
> static {
> setBar(); // blows up with IAE as of class version >= 53
> }
> static void setBar() {
> bar = true;
> }
> }
> {code}
> Where the bar field is a field declared by the proxy code and set by another
> static method which is called by the <clinit> block. A proper fix would be
> to change the generated code to do something more like this:
> {code:title=Foo.java|borderStyle=solid}
> public class Foo {
> static final boolean bar;
> static {
> bar = getBar();
> }
> static boolean getBar() {
> return true;
> }
> }
> {code}
> But as of now I am not sure how complicated of a change that would be to the
> proxy code. The simple fix is to not generate these static private fields as
> final.
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