Duo Zhang commented on HBASE-7612:

Bad news, our {{Counter}} is declared as {{InterfaceAudience.Public}}...

And also it is used everywhere so I think we'd better do the replacement by 
class otherwise the patch will be very very big...


> [JDK8] Replace use of high-scale-lib counters with intrinsic facilities
> -----------------------------------------------------------------------
>                 Key: HBASE-7612
>                 URL: https://issues.apache.org/jira/browse/HBASE-7612
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Andrew Purtell
>            Priority: Trivial
>             Fix For: 2.0.0
> JEP155 introduces a few new classes (DoubleAccumulator, DoubleAdder, 
> LongAccumulator, LongAdder) that "internally employ contention-reduction 
> techniques that provide huge throughput improvements as compared to Atomic 
> variables". There are applications of these where we are currently using 
> Cliff Click's high-scale-lib and for metrics.
> See http://openjdk.java.net/jeps/155

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