[HBASE-11590] use a specific ThreadPoolExecutor

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Abandoned
• Affects Version/s: 1.0.0, 2.0.0
• Component/s: Client, Performance
• Assignee: Unassigned
• Reporter: Nicolas Liochon
• Created: 25/Jul/14 12:06
• Updated: 17/Jun/22 16:14
• Resolved: 17/Jun/22 16:14

Description

The JDK TPE creates all the threads in the pool. As a consequence, we create (by default) 256 threads even if we just need a few.

The attached TPE create threads only if we have something in the queue.
On a PE test with replica on, it improved the 99 latency percentile by 5%.

Warning: there are likely some race conditions, but I'm posting it here because there is may be an implementation available somewhere we can use, or a good reason not to do that. So feedback welcome as usual.