RFR: 8323740: java.lang.ExceptionInInitializerError when trying to load XML classes in wrong order [v2]

[Joe Wang]

On Fri, 20 Dec 2024 19:27:00 GMT, Liam Miller-Cushon <cushon at openjdk.org> wrote:

>> Please consider this fix for [JDK-8323740](https://bugs.openjdk.org/browse/JDK-8323740), which avoids an `ExceptionInInitializerError` in the class initializer of `XMLDocumentFragmentScannerImpl` and other classes that have a circular dependency on `jdk.xml.internal.JdkXmlUtils`. The change breaks the cycle by moving some initialization out of the class initializer of `JdkXmlUtils`.
>
> Liam Miller-Cushon has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:
> 
>  - Merge remote-tracking branch 'origin/master' into JDK-8323740
>  - 8323740: java.lang.ExceptionInInitializerError when trying to load XML classes in wrong order

Looks good.

To answer Alan's question, it's unlikely to arise when using just the exported/supported API since the util class will generally be loaded early during the initialization process.

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Marked as reviewed by joehw (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/22803#pullrequestreview-2548837020