testcase failure java/util/Locale/Bug6989440.java
naoto.sato at oracle.com
Wed Oct 5 14:57:47 UTC 2011
I appreciate it, and will fix the test case.
On 10/5/11 7:07 AM, Chris Hegarty wrote:
> Alan, David,
> I noticed CR 7027061 was closed as 'not a defect'. Should I file a new
> CR to have the jtreg test fixed (join on all created threads)? The test
> will still exercise what it is supposed to, and the
> ConcurrentModificationException issue can be investigated at another
> time. This way we can get more stable test runs.
> On 04/10/2011 17:04, David Holmes wrote:
>> Thanks Chris and Alan.
>> On 4/10/2011 11:24 PM, Alan Bateman wrote:
>>> 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.
>> I wasn't aware of this behaviour from jtreg (but then I don't write such
>> tests). It explains the jtreg "error". I expect the test threads are not
>> responsive to interrupts (why should they be).
>> The reported ConcurrentModificationException would indicate a potential
>> issue still remaining in the locale code.
>>> 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.
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