Why does JMX show XNIO ConnectionCount -1?

533 Views Asked by Nick Collins At 27 April 2025 at 02:16

So I am trying to get JMX metrics on my Undertow webserver's number of open connections.

I used JMXTerm and selected the following bean because it is bound to port 8080, which is what my application is running on:

org.xnio:address="/0.0.0.0:8080",provider="nio",type=Xnio,worker="XNIO-2"

I can see a metric for ConnectionCount however when I query for it I get -1

$>get ConnectionCount
#mbean = org.xnio:address="/0.0.0.0:8080",provider="nio",type=Xnio,worker="XNIO-2":
ConnectionCount = -1;

I would expect the value to be some positive number, not sure what -1 is even supposed to represent?

There are 1 best solutions below

Ramesh Subramanian On 08 February 2019 at 06:41