We newly installed PI 7.3 dual stack.It was working fine and we created couple of proxy scenarios with ECC system.
Now suddenly ESR stopped opening. It is giving error "Cannot load the requested servlet [rep/servlet/JnlpServlet]" when tried to open from Integration builder link. The strange part is when I opened SPROXY, it works perfectly fine and showing my interfaces into the ECC system. Also Integration directory is opening perfectly fine.