SBR linux OL9 JDK22 b18
java.lang.AssertionError: expected [true] but found [false]
at org.testng.Assert.fail(Assert.java:99)
at org.testng.Assert.failNotEquals(Assert.java:1037)
at org.testng.Assert.assertTrue(Assert.java:45)
at org.testng.Assert.assertTrue(Assert.java:55)
at Timeouts.testTimedAccept9(Timeouts.java:437)

create a serversocket
set timeout for 4 seconds
schedules a thread interrupt in 1 second
invokes accept

SocketTimeoutException thrown but serversocket accept is not interrupted.

There are a couple of thousand threads executing over 64 cpus, conjecture that 4 seconds is intermittently not sufficient for the interrupter to actually run, even though it is expected within 1 second, it may only be RTR. Perhaps extend the socket timeout a bit.
Alternatively the interrupt was missed.

some elementary diagnostic in the scheduled task to highlight that the scheduled activity is about to take place would be useful.