The nightly test:
is being timed out due to the test hanging.
The test result can be found at:
vm-amd64-07 (note you have to use the gtee account to login) but I've also seen it on my workstation. The hang happens quite frequently on the test system.
This test is also being run with +ExplicitInvokesConcurrent.
In the test there is a Java thread that performs System.gc calls in a loop; a thread that just increments a counter in a loop; and a thread that sleeps for a specified period of time, wakes up and sets the loop termination variable for the other 2 threads.