RFR: 8244537: JDI tests fail due to "ERROR: Exception : nsk.share.jdi.JDITestRuntimeException: JDITestRuntimeException : ** event IS NOT a breakpoint **"

[Leonid Mesnik]

It should be failure anyway if we managed to enable events, so we don't expect to really enable anything in these cases. 
However I agree that adding suspend/resume shouldn't make it worse, just possible cleaner log (in very rare cases also). If you feel it is need I will just add suspension for all cases.

Leonid

> On Jul 28, 2020, at 1:54 PM, serguei.spitsyn at oracle.com wrote:
> 
> Does it mean, you did not fix cases 0 and 2 because the related failures have never been observed?
> 
> Thanks,
> Serguei
> 
> 
> On 7/28/20 13:51, Leonid Mesnik wrote:
>> Test should fail in cases 0 and 2 with IllegalThreadStateException if we can enable events. Such failures should be easily identified by reading logs.
>> 
>> Leonid
>> 
>> 
>>> On Jul 27, 2020, at 10:28 PM, serguei.spitsyn at oracle.com <mailto:serguei.spitsyn at oracle.com> wrote:
>>> 
>>> Hi Leonid,
>>> 
>>> The fix looks good in general.
>>> You missed to explain that the suspend/resume are added to avoid actual generation of event that cause this issue.
>>> The reason is that these events are not actually required. 
>>> 
>>> 
>>> http://cr.openjdk.java.net/~lmesnik/8244537/webrev.00/test/hotspot/jtreg/vmTestbase/nsk/jdi/EventRequest/setEnabled/setenabled003.java.frames.html <http://cr.openjdk.java.net/~lmesnik/8244537/webrev.00/test/hotspot/jtreg/vmTestbase/nsk/jdi/EventRequest/setEnabled/setenabled003.java.frames.html>
>>>  316               case 1:
>>>  317                      vm.suspend();
>>>  ...
>>>  336                      vm.resume();
>>> 
>>> Q: Why is only in case 1 suspend/resume used?
>>>    What about cases 0 and 2?
>>> 
>>> Thanks,
>>> Serguei
>>> 
>>> 
>>> On 7/27/20 18:08, Leonid Mesnik wrote:
>>>> Hi
>>>> 
>>>> Could you please review following fix which suspends debugger VM while enabling/disabling events. 
>>>> 
>>>> All changed tests fail intermittently getting unexpected events instead of breakpoint used for communication between debugger/debuggee VM. The tests request different events and verify request's properties but don't process/verify events themselves. Test doesn't aware if events are generated or not. The vm suspension doesn't affect JDWP native agent and it still should get and verify JDWP commands.
>>>> 
>>>> webrev: http://cr.openjdk.java.net/~lmesnik/8244537/webrev.00/ <http://cr.openjdk.java.net/~lmesnik/8244537/webrev.00/>
>>>> bug: https://bugs.openjdk.java.net/browse/JDK-8244537 <https://bugs.openjdk.java.net/browse/JDK-8244537>
>>>> 
>>>> 
>>>> Leonid
>>> 
>> 
> 

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