wamp synchronous call blocking indefinitely

[sunilabc052]

I created three autobahn clients; Hello, World, TestClient

World:

registers "com.examples.world" method with bonefish router and returns string

Hello:

registers "com.examples.hello" method with bonefish router. When this methods gets called, it will make a synchronous call to "com.examples.world" and returns the result. Here synchronous call to "com.examples.world" method, blocking indefinitely.

TestClient:

calls "com.examples.hello" method.

How to make synchronous call from autobahn client "Hello" to autobahn client "World"?