Oracle connection error

java.sql.SQLException: Io exception: The Network Adapter could not establish the connection at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java)

I am getting this error开发者_开发技巧 when data in database is increased (nearly 3000). It works fine with limited data (say 100).

The Network Adapter could not establish the connection

Is typically thrown when

• the Oracle listener is not running
• the wrong hostname was specified in the connection url
• the wrong port was specified in the connection url
• the port is blocked by firewall

I have never seen it related to "increasing" the data in the database