this message just means that there are validation error. There is nothing about RichFaces.
yes you are right.
however this validation message is logged into the log file, but the UI (browser) stucks/hang afterwards.
My doubt here is
i> does richfaces (ajax) supports the VM machines ? becase it's working fine on other system.
ii> is there any way to debug or get error details for this ?
I think this exception (Cannot Connect to 188.8.131.52) will not disappear if you even remove richfaces from application and will use just core tags