Resolve HTTP Tunneling error in Oracle WebLogic Server
If you are getting error similar to following, here is a tip for you:

java.net.ProtocolException: Tunneling result unspecified - is the HTTP server at host: 'proxy-host.com' and port: '80' a WebLogic Server?; No available router to destination
        at weblogic.rjvm.RJVMFinder.findOrCreateInternal(RJVMFinder.java:216)
        at weblogic.rjvm.RJVMFinder.findOrCreate(RJVMFinder.java:170)
        at weblogic.rjvm.ServerURL.findOrCreateRJVM(ServerURL.java:153)
        at weblogic.jndi.WLInitialContextFactoryDelegate$1.run(WLInitialContextFactoryDelegate.java:345)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:146)
        at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:340)