ConnectException

[henrik.nyberg]

We are currently testing the JBoss application server in a benchmark test. When testing the performance of stateless session beans, we get the following error message:

"ADAM batch, running 250 clients, each client making 2000 requests, each request comprising 1 tiers
RMI exception: java.rmi.ConnectException: Connection refused to host: 192.168.0.130; nested exception is:
java.net.ConnectException: Connection refused: connect
RMI exception: java.rmi.ConnectException: Connection refused to host: 192.168.0.130; nested exception is:
java.net.ConnectException: Connection refused: connect"

Does anyone know what the cause of this error message can be? It seems to occur when the number of simultaneous remote clients exceed 200. There is no error message in the server log.

We have successfully performed this benchmark test on several other major application servers, running up to 1000 clients for several days.

Henrik

[adrian.brock]

Hi,

Read this.

http://main.jboss.org/thread.jsp?forum=61&thread=9970

Regards,
Adrian

[henrik.nyberg]

We run our tests on Windows 2000 Advanced Server, Dell PowerEdge servers. We have successfully run the tests for 1000 clients on other application servers in the exact same configuration so there should be no denial of service involved. Regarding the requests they all come from a single ip address, so it should not be a licensing problem either.

Henrik

[adrian.brock]

Weird isn't it?

It works fine on Linux but Windows refuses the connections?

I'll have another look at this tomorrow when I've got
more time. I've only got XP Home on my laptop, but
I'll try it anyway ;-)

Regards,
Adrian

[adrian.brock]

Hi,

I found this.
http://developer.java.sun.com/developer/bugParade/bugs/4420157.html

Windows isn't mentioned explicity, but the evaluation
of the linked problem mentions "certains OS's"

I've already found one change that helps to workaround
this problem. I'll see what else we can do.

Regards,
Adrian