I had made connection to the remote Oracle database through SQLDeveloper on my system. Suddenly, the power went down and I had to restart the system.

Now, when I am trying to connect to the remote oracle database, it's throwing an error message:

> 
> The Network adapter could not establish the connection.
> 
> 
> Vendor code 20
> 
> 
> 

Can anyone help me solving this problem?