Should I create a separate ticket for this?  It appeared to me like the 
issue with AbstractNodeQueue was fixed though.  Am I reading this wrong?  

On Friday, March 4, 2016 at 7:38:47 AM UTC-5, √ wrote:
>
> Could be related to: https://github.com/akka/akka/issues/19216
>
> On Fri, Mar 4, 2016 at 1:26 PM, Chris Baxter <[email protected] 
> <javascript:>> wrote:
>
>> I have noticed a strange issue after we upgraded to akka 2.4.2 that 
>> appears sporadically but once it rears its ugly head it basically causes 
>> the server to consume a ton of CPU and we have to restart.  This issue 
>> appears to be with the smallest mailbox pool router.  It gets hung up in 
>> peekNode in AbstractNodeQueue, in that do/while loop:
>>
>>     protected final Node<T> peekNode() {
>>
>>         final Node<T> tail = ((Node<T>)Unsafe.instance.getObjectVolatile(
>> this, tailOffset));
>>
>>         Node<T> next = tail.next();
>>
>>         if (next == null && get() != tail) {
>>
>>             // if tail != head this is not going to change until 
>> producer makes progress
>>
>>             // we can avoid reading the head and just spin on next until 
>> it shows up
>>
>>             do {
>>
>>                 next = tail.next();
>>
>>             } while (next == null);
>>
>>         }
>>
>>         return next;
>>
>>     }
>>
>>
>> I have attached a screenshot of the thread dump from jconsole.  I'm still 
>> in the early stages of debugging this, but would appreciate any info from 
>> the akka team on this.
>>
>> -- 
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>
>
>
> -- 
> Cheers,
> √
>

-- 
>>>>>>>>>>      Read the docs: http://akka.io/docs/
>>>>>>>>>>      Check the FAQ: 
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>>      Search the archives: https://groups.google.com/group/akka-user
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