testcase failure

[Alan Bateman]

Chris Hegarty wrote:
> Trivially, should the main thread in the test be waiting on the three 
> other threads to complete before exiting?
>
> I think jtreg will try to cleanup once the main thread completes. The 
> main thread should keep an array of the threads it creates and invoke 
> join() on each of them before returning from main. We do this all the 
> time in other areas.
Right, once the main thread completes then jtreg will attempt to cleanup 
the remaining non-daemon threads in the thread group. It does this by 
interrupting each of the remaining threads in a loop up to a maximum 
number of rounds or until the remaining threads have terminated. It's 
possible that if the test is changed up to join on each of the 3 threads 
that this intermittent failure will go away. If so, then it suggests to 
me that perhaps the interrupt is causing a side effect that causes one 
of the threads to go into a loop block uninterruptedly. This is just a 
guess of course and it requires digging into the Locale code to come up 
with specific theories.

-Alan.