Re: [jetty-users] Jetty 9.03 - seeing maximum websocket connection limit

[Joakim Erdfelt <joakim@xxxxxxxxxxx>]

Jetty 9.0.3 is very old and represents the earliest implementations of the websocket stack.

Please consider using something more recent.

Especially since you are also using HTTPS (TLS/SSL) as you have an obligation to keep your Jetty and JVM up to date to maintain compatibility with the quickly evolving TLS/SSL landscape.

Jetty 9.4.7.v20170914 was just released.

http://dev.eclipse.org/mhonarc/lists/jetty-announce/msg00111.html

Java 1.8u133 is odd, that doesn't look right (cannot find a Java release with that update number)

Release notes for 1.8u131 says it expired July 18, 2017

Release notes for 1.8u141 says it will expire next month on Oct 17, 2017

Also, since you stated you are running on Windows 10, keep in mind that many Windows network security tools / firewalls will get in your way and limit/prevent behaviors you might be attempting to rely on.

Joakim Erdfelt / joakim@xxxxxxxxxxx

On Tue, Sep 19, 2017 at 5:10 AM, Houtman, Roland <Roland.Houtman@xxxxxxxxxxxxxxx> wrote:

Hi All,

 

We’re running

  1x Windows 10 inside virtualBox for the server instance 

  3x Windows 10 on a physical machine to run 25 client instances each

 Java 1.8u133 with 2GB ram.

 Jetty 9.03

 

We’re connecting software which opens per instance:

-          two websockets, and

-          some servlets for listing folder content which is invoked regularly. And

-          a servlet for downloading files.

all via HTTPS

When opening about 40 client instances,

Then, setting up the websocket fails more and more. With many tries I got to 52 client software instances running.

The server software is still having 1 GB free heapspace. And no noticeable CPU usage

Which machine the client software runs from(i.e. either single client instance running,or 25 instances running), has no impact on success rate.

 

Does anyone know why this limit is surfacing?

I already read somewhere to increase the QueuedThreadPool. I set it (from default 200) to 750, but there was no noticeable difference.

 

 

Kind regards,

Roland

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