> This is a test bug. The test should filter out non-tested threads to avoid > generating such kind of deadlocks. > > In short, the deadlock dependencies are: > > - The `Common-Cleaner` thread is executing the JVM TI agent `MethodEntry` > event callback which grabbed the `agent_lock` raw monitor and calls JVM TI > `GetFrameCount`. The `GetFrameCount` is blocked in disabling VTMS transitions > because the `ForkJoinPool-1-worker-2` is at a mount (VTMS) transition. > - The `ForkJoinPool-1-worker-2` is at mount (VTMS) transition and blocked in > `java.lang.ref.NativeReferenceQueue.poll()` when acquiring the > `NativeReferenceQueue` lock which is held by the `Reference Handler` thread. > - The `Reference Handler` thread grabbed the `NativeReferenceQueue` lock and > is entering the `signal()` method. It triggered a JVM TI `MethodEntry` event. > The JVM TI agent `MethodEntry` event callback is blocked on grabbing the > `agent_lock` raw monitor which is held by the `Common-Cleaner` thread. > > Also, the `timeout=360 `is explicitly set to avoid frequent timeouts in > locals runs. > > Testing: submitted mach5 job with 100 runs on 3 debug platforms.
Serguei Spitsyn has updated the pull request incrementally with one additional commit since the last revision: remove trailing white space ------------- Changes: - all: https://git.openjdk.org/jdk19/pull/129/files - new: https://git.openjdk.org/jdk19/pull/129/files/046d3525..9ae069c6 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk19&pr=129&range=03 - incr: https://webrevs.openjdk.org/?repo=jdk19&pr=129&range=02-03 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk19/pull/129.diff Fetch: git fetch https://git.openjdk.org/jdk19 pull/129/head:pull/129 PR: https://git.openjdk.org/jdk19/pull/129
