Hi,
I have a funny scenario where my wildfly instance (Wildfly 9.0.2) on my Windows server (Windows 2012 R2-Standard) appears to be exhausting the dynamic port range of the euphemeral ports.
From netstat, these ports appear to be used by "ESTABLISHED loopback connections".
After much digging I discovered that the count of loopback connections appear to be affected by the number or io-threads specified in the io-subsystem of my Wildfly standalone XML.
| IO-THREADS | Task Max Thread | No of Loopback Connections |
|---|
| 100 | 1000 | 454 |
| 50 | 1000 | 305 |
| 10 | 1000 | 225 |
Why does Wildfly create so many loopback connections? How can I derive the optimal number of io-threads required for our apps to run while not exhausting the dynamic port range?
Thanks in advance!
Further environment information:
Server: Windows Server 2012 R2 Standard
Processor: Intel(R) Xeon(R) CPU E5-2670 v3 @2.30GHz 2.30GHz (6 processors)
RAM: 64GB
System Type: 64-bit Operating System
