[
Date Prev][
Date Next][
Thread Prev][
Thread Next][
Date Index][
Thread Index]
[
List Home]
|
Re: [jetty-users] Scalability of ProxyServlet$Transparent and Tomcat
|
Sounds like you need to ask Tomcat what is going on.
We can help you sort out issue if you run the transparent proxy on jetty itself.
As we ... well .. wrote the jetty server, we should know how it works inside out. :-)
--
Developer advice, services and support
from the Jetty & CometD experts.
On Thu, Jul 26, 2012 at 8:14 AM, Gian Luca Ortelli
<gianluca.ortelli@xxxxxxxxxxx> wrote:
Hi,
I have set up a basic web application to try out the Transparent servlet. The relevant block of my web.xml reads:
<servlet>
<servlet-name>proxy</servlet-name>
<servlet-class>org.eclipse.jetty.servlets.ProxyServlet$Transparent</servlet-class>
<init-param>
<param-name>ProxyTo</param-name>
</init-param>
<init-param>
<param-name>Prefix</param-name>
<param-value>/</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
I'm using version 8.1.1.v20120215 of jetty-servlet, and I'm deploying to Tomcat 7.0.21.
A server is listening on
http://localhost:8080/, and it takes 5 seconds to serve each request that it receives (the response is a few characters).
In my tests I'm firing several simultaneous requests to the server, proxied through the Transparent servlet.
Now, from what I know about the Transparent, I would expect that Tomcat's HTTP thread pool doesn't limit the number of concurrent requests; as soon as a new request comes in, it should be immediately handed over to a thread of Transparent's own pool, which in turn does the proxying job using asynchronous IO.
Instead, what I observe is that the size of Tomcat's pool IS the limit for concurrent requests. Did I misunderstand the functioning and purpose of the Transparent? Or is this just a "feature" of the combination Tomcat + Jetty servlet?
Hoping that someone will shed some light on this.
Greetings,
Gianluca
_______________________________________________
jetty-users mailing list
jetty-users@xxxxxxxxxxx
https://dev.eclipse.org/mailman/listinfo/jetty-users
