[HBASE-7612] [JDK8] Replace use of high-scale-lib counters with intrinsic facilities

• Type: Sub-task
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Component/s: metrics
• Hadoop Flags: Reviewed
• Release Note: org.apache.hadoop.hbase.util.Counter is deprecated now and will be removed in 3.0. Use LongAdder instead.
• Assignee: Duo Zhang
• Reporter: Andrew Kyle Purtell
• Created: 17/Jan/13 19:25
• Updated: 15/Jun/22 23:54
• Resolved: 19/Sep/16 05:44

Description

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

Issue Links

• links to: reviewboard