TestThread: Try interrupt() before stop() in tearDown() #8169
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This allows interruptible threads (like those in InterruptibleMonitorTest) to clean up gracefully instead of relying solely on the deprecated Thread.stop() method. The implementation: 1. Calls interrupt() first 2. Waits DUE_DILIGENCE_MILLIS for the thread to respond 3. Falls back to reflective stop() only if the thread is still alive This addresses Issue google#7319 as suggested by cpovirk.
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Summary
This PR improves
TestThread.tearDown()to tryinterrupt()before falling back toThread.stop(), as suggested by @cpovirk in #7319.Changes:
interrupt()first, allowing interruptible threads (like those inInterruptibleMonitorTest) to clean up gracefullyDUE_DILIGENCE_MILLIS(100ms) for the thread to respond to the interruptstop()if the thread is still alive after the interrupt attemptMotivation
The existing implementation immediately tries
Thread.stop()via reflection, which:UnsupportedOperationExceptionon Java 20+Many test threads (particularly in
InterruptibleMonitorTest) are designed to respond to interrupts. By tryinginterrupt()first, we allow these threads to terminate cleanly without relying on the deprecatedstop()method.Behavior by Java Version
Testing
Verified locally that existing tests pass:
InterruptibleMonitorTest- 16 tests ✅UninterruptibleMonitorTest- 16 tests ✅UninterruptiblesTest- 49 tests ✅Related Issues
Fixes #7319