setAffinity does not work as expected in Windows

[kopavel]

On win 11 got warning:
"Tried to set affinity to {7} but was {0,1,2,3,4,5,6,7} you may have insufficient access rights"
and nohing heppend - thread remain affined to all cores.

Java version: jdk-21.0.2.13-hotspot (Eclipse Adoptium)
jna and jna-platform verstion: 5.14.0
affinity version: 3.23.3

Thread, for which i try to lock affiniti created by :

Thread.ofPlatform().name("AffinedThread").start(() -> {
try (AffinityLock al = AffinityLock.acquireLock()) {
.....
}
});

Starting console in which java started with Admin rights change nothing.

[tgd]

Thanks @kopavel we will take a look soon.

For expedited support we do offer commercial options - https://chronicle.software/contact-us/

[kopavel]

Just re-check sittuation again using task manager - thead actually ARE binded as expected... so actually - it'a a false WARNing from code...

[tgd]

Thanks for letting us know - we will close for now and potentially re-open in future.

[mr-infty]

I am experiencing the same problem (affinity version 3.23.3), i.e. I get the same error message. I have also checked manually using the task manager, and it shows that the affinity was not modified.

According to https://learn.microsoft.com/en-en/windows/win32/api/winbase/nf-winbase-setthreadaffinitymask the return value of SetThreadAffinityMask already indicates whether the operation was succesful. Why don't you test for that?

P.S.: I have run java.exe from a PowerShell with administrative privileges.

[tgd]

Thanks for reporting it @mr-infty - we have a PR in flight for this and will work on getting it tested and released. We will update the ticket here when that's done.