[jdk17u-dev] RFR: 8256811: Delayed/missed jdwp class unloading events [v4]

[Andrew Dinn]

On Wed, 7 Sep 2022 09:54:02 GMT, Andrew Dinn <adinn at openjdk.org> wrote:

>> Backport of patch to fix class unloading event notification.
>> 
>> This backport was originally developed by @zhengyu123 and involved some minor changes to the original patch.
>> 
>> n.b. the original patch required a follow up fix (cf JDK-8290908) which also needs backporting after this has been included.
>
> Andrew Dinn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   correct type

The upstream work on this issue is still in progress as fixes up to now have improved but neither eradicated the problem nor even diagnosed root cause - in fact the fixes actually stumbled into a secondary issue on Windows. So, I have been hesitating before pushing something that might not remove or workaround the problem.

It looks like Chris Plummer has identified the source of the Windows issue and provided a workaround for it (see https://bugs.openjdk.org/browse/JDK-8292879 and associated PR https://github.com/openjdk/jdk/pull/10519). So, I think it is probably worth proceeding with all the fixes up to and including this one.

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PR: https://git.openjdk.org/jdk17u-dev/pull/635