Darrel Schneider created GEODE-9471: ---------------------------------------
Summary: gfsh show dead-locks will fail on java 16 and later Key: GEODE-9471 URL: https://issues.apache.org/jira/browse/GEODE-9471 Project: Geode Issue Type: Bug Components: core Reporter: Darrel Schneider The gfsh show dead-locks command ends up depending on this class: org.apache.geode.distributed.internal.deadlock.UnsafeThreadLocal Most of the time this UnsafeThreadLocal just behaves like a normal jdk ThreadLocal (its super class). But when the gfsh command is executed it causes "get" to be called on UnsafeThreadLocal. It uses a bunch of reflection to prevent "get" from setting an initial value in the case of a miss. This reflection calls setAccessible which will cause get to fail on java 16 and later (see: https://softwaregarden.dev/en/posts/new-java/illegal-access-in-java-16). To workaround this failure set the JVM command line option: --illegal-access=permit The current solution iterates all the threads in the jvm checking which are in the thread local by doing a get. This would cause the thread local to end up containing all threads. What we could do on these scans (they only happen when gfsh show dead-locks is executed) is if the get misses for a thread we could turn around and call ThreadLocal.remove. A bit more expensive than the current solution but it would be safe and work on java 16. -- This message was sent by Atlassian Jira (v8.3.4#803005)