[jdk21u-dev] RFR: 8375001: NativeThreadSet get wrong currentNativeThread when using virtual thread

[Severin Gehwolf]

On Mon, 12 Jan 2026 09:48:23 GMT, Jiawei Tang <jwtang at openjdk.org> wrote:

> Hi, I create an issue in the bug system: https://bugs.openjdk.org/browse/JDK-8375001
> 
> `NativeThread.currentNativeThread();` should be replaced by `NativeThread.current();`. Otherwise, when using virtual thread, the program will run into a wrong state.
> 
> Now, I just changed the function used in NativeTheadSet.java, but I did not delete the `currentNativeThread` in `src/java.base/unix/classes/sun/nio/ch/NativeThread.java` and `src/java.base/windows/classes/sun/nio/ch/NativeThread.java` . I am wondering if I should delete these functions since they are useless now. I hope to get some advice. Thank you!
> 
> Besides, the jtreg testcases which can produce this issue is from JDK-8310902 (with option: `-testThreadFactory:Virtual -testThreadFactoryPath:./jtregTestThreadFactory.jar`). Do I need to bring the testcase `test/jdk/java/nio/channels/FileChannel/CloseDuringTransfer.java` here?

This should probably fixed with a backport of https://bugs.openjdk.org/browse/JDK-8321594 instead.

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/2542#issuecomment-3744687969