sqldeveloper error message: Network adapter could not establish the connection error

Question

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 t

Answer 1

Problem - I was not able to connect to DB through sql developer.

Solution - First thing to note is that SQL Developer is only UI to access to your database. I need to connect remote database not the localhost so I need not to install the oracle 8i/9i. Only I need is oracle client to install. After installation it got the path in environment variable like C:\oracle\product\10.2.0\client_1\bin. Still I was not able to connect the db.

Things to be checked.

1. Listner/port should be up for the server IP where you want to connect.
2. you will be able to ping the server. go to cmd prompt. type ping server Ip then enter.
3. telnet the server IP and port. should be succesful.

If all points are ok for you then check from where you are running sql developer .exe file. I pasted sql developer folder to C:\oracle folder and run the .exe file from here and I am able to connect the database. and my problem of 'IO Error: The Network Adapter could not establish the connection' got resolved. Hurrey... :) :)