[hibernate-dev] intermittent NPE during an AS7 testsuite run (with Hibernate 4.0.0.Beta1)

[Scott Marlow]

Good point, it should be "final".

I'll make that change (if not done already).

On 06/22/2011 11:20 AM, Emmanuel Bernard wrote:
> Could it be some thread concurrency visibility?
> Since it's a concurrent hashmap, I'd venture it's accessed concurrently :)
>
> Try and make the variable final (or volatile) to ensure proper visibility across threads.
>
> On 22 juin 2011, at 02:44, Scott Marlow wrote:
>
>> I'm not sure if we will see this NPE again but found the location
>> interesting.  I wanted to report the failure in case it happens again in
>> the future or anyone else is interested in playing detective for
>> mysteries like this. ;)
>>
>> The exception call stack is here http://pastie.org/2104060
>>
>> It looks to me like AbstractServiceRegistryImpl.serviceBindingMap is
>> null for some reason.  It makes me wonder if
>> AbstractServiceRegistryImpl.destroy() was called prematurely for some
>> reason (for some unexpected reason).
>>
>> I wanted to mention the NPE here in case it happens again, so we can see
>> what is in common with this one.  Next time, we will have to capture the
>> AS server.log output which might have additional clues but didn't this time.
>>
>> Scott
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>