oracle RAC-takes time to connect

I have one sample JDBC program which connects to RAC.
If all the participating node of cluster are up then I m able to connect in some few seconds(say 2 second).
Even if instance is not running on any one of the nodes of cluster, it takes few seconds to connect.

But if single node of cluster is completely shutdown(i.e switched off) then it takes some 150 second to 250 second to connect.


Can someone assist me how to reduce this connect time.?


I guess it takes more in later case, bcoz it needs to know the status of nodes

Revise your listeners and tnsnames setup

look at your tcp timeouts

tell us the version at least

thanks