RFR (S) 8048215: [TESTBUG] java/lang/management/ManagementFactory/ThreadMXBeanProxy.java Expected non-null LockInfo
david.holmes at oracle.com
Mon Oct 15 11:55:11 UTC 2018
Thanks for the review Daniel!
On 15/10/2018 7:47 PM, Daniel Fuchs wrote:
> Hi David,
> Good finding! Looks reasonable to me.
> best regards,
> -- daniel
> 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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