Qlik Sense connection from java client response with "SESSION_ATTACHED" instead of "SESSION_CREATED"

[Mrugesh]

Trying to implement Java client to connect with qlik server via certificate connection.

1) Using websocket connection, wss://server.domain.com:4747/app/ 

2) Client and Root certificate used at time of connection

However, sometimes it responses with below message :

java.lang.Exception: {"jsonrpc":"2.0","method":"OnConnected","params":{"qSessionState":"SESSION_ATTACHED"}}

I do not understand the reason of why some time it is responding as "SESSION_ATTACHED" instead of "SESSION_CREATED" ? Is that means multiple connections ?

How can we resolve this issue ?