We are on 4.2.3 and have a scenario where upto 2000 websocket users connect in a very short time (within a few seconds) to the openfire server when the original server they are connected to becomes unreachable.
We are seeing very high CPU consumption from jetty when this happens.
The CPU consumption is seen in org.eclipse.jetty.io.ssl.Sslconnection$DecryptedEndPoint.fill. I have attaached the stack trace.
There seems to be issues around this in the wild, (https://bugs.eclipse.org/bugs/show_bug.cgi?id=431739) but which seems to be fixed in 9.1.x versions.
The openfire 4.2.3 seems to be using 9.2.14.v20151106.
I can see that Jetty has been upgraded to 9.4 in the later versions.
Are there any known issues here wrt performance ?