Question of creating a Session and Logging In on cluster Agile server

I'm using sdk guide code to create session by their own url. Ex:"http://manage1.com:7001/Agile";"http://manage2.com:7001/Agile";

But it have error when the manage1 have shut down.(admin still up)

Agile still can be use when using manage2, and it run the px on manage2.

Error append when px creating a session.

Root Cause exception : java.net.ConnectException: t3://manage1:7001: Destination HOST IP, 7001 unreachable; nested exception is:
        java.net.ConnectException: Connection refused: no further information; No available router to destination

I have already confirmed that I'm using url "http://manage2.com:7001/Agile",but it still go to manage1.