RFR (S) 8048215: [TESTBUG] java/lang/management/ManagementFactory/ThreadMXBeanProxy.java Expected non-null LockInfo
daniel.fuchs at oracle.com
Mon Oct 15 09:47:54 UTC 2018
Good finding! Looks reasonable to me.
On 15/10/2018 05:23, David Holmes wrote:
> 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.
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