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[#391] Cope with Thread::stop being unavailable in JDK 20+ #393

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merged 2 commits into from Nov 11, 2023

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kriegaex
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In JDK 20+, the long deprecated Thread.stop() (since JDK 1.2) has been removed and will throw an UnsupportedOperationException. This will be handled gracefully when using option stopUnresponsiveDaemonThreads, yielding a log warning "Thread.stop() is unavailable in this JRE version, cannot force-stop any threads" once and not trying to stop any further threads during the same execution.

Tests and documentation have been adjusted accordingly.

Closes #391.

In JDK 20+, the long deprecated Thread.stop() (since JDK 1.2) has been
removed and will throw an UnsupportedOperationException. This will be
handled gracefully when using option 'stopUnresponsiveDaemonThreads',
yielding a log warning "Thread.stop() is unavailable in this JRE
version, cannot force-stop any threads" once and not trying to stop any
further threads during the same execution.

Tests and documentation have been adjusted accordingly.

Closes mojohaus#391.
Because mojohaus#391 introduces special handling of the fact that in JDK 20+
there is no more Thread::stop, we should also run the tests on JDK 21.
@kriegaex
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@slawekjaranowski, this is ready for review.

@slawekjaranowski
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Thanks.

I think we also should deprecate options stopUnresponsiveDaemonThreads of exec:java

@slawekjaranowski slawekjaranowski merged commit 6fae009 into mojohaus:master Nov 11, 2023
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@kriegaex
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I think we also should deprecate options stopUnresponsiveDaemonThreads of exec:java

Despite Thread::stop being deprecated for a long time, it still works in JDK 17 LTS, which is just 2 years old, up to JDK 19 (1 year old). Given the fact that the plugin still is built with target 8, JDK 8 LTS being 9 years old, I guess that there might still be Java 17 users for many years to come. I just fixed the build for JDK 21 today. So, of course you can deprecate the option, but probably it will stick around for quite a while.

@kriegaex kriegaex deleted the gh-391 branch November 11, 2023 10:36
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Properly handle UnsupportedOperationException thrown by Thread::stop in JDK 20+
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