RFR (S) 8048215: [TESTBUG] java/lang/management/ManagementFactory/ThreadMXBeanProxy.java Expected non-null LockInfo

David Holmes david.holmes at oracle.com
Mon Oct 15 04:23:50 UTC 2018

bug: https://bugs.openjdk.java.net/browse/JDK-8048215
webrev: http://cr.openjdk.java.net/~dholmes/8048215/webrev/

Simple race condition in the test. The main thread does checks that are 
only valid once the target thread has called o.wait() but there's 
nothing to ensure that point of execution is reached. The failure is 
easily reprodcued by just putting in a sleep after:

Object o = new Object();

Fix is to add a shared 'waiter' Object that the target waits upon and 
for which the main also synchronizes on such that the main thread can't 
proceed until wait() has been called and released the monitor.


More information about the serviceability-dev mailing list