IO Error: The Network Adapter could not establish the connection

java windows-7 jdbc oracle11g bootcamp
Strawberry picture Strawberry · Sep 25, 2012 · Viewed 288.8k times · Source

I am new to Oracle, and am trying to run a simple example code with Java, but am getting this error when executing the code.. I am able to start up the listener via CMD and am also able to run SQL Plus. Can anyone give me a hand and tell me what I might be doing wrong?

Update: I am using JDBC.

Database is local, and I actually had it working but it stopped working just today. I'm not really sure why though. Would you mind giving me some procedures to follow by since I don't know much.

Answer

Marquis of Lorne picture Marquis of Lorne · Sep 25, 2012

Either:

  1. The database isn't running
  2. You got the URL wrong
  3. There is a firewall in the way.

(This strange error message is produced by Oracle's JDBC driver when it can't connect to the database server. 'Network adapter' appears to refer to some component of their code, which isn't very useful. Real network adapters (NICs) don't establish connections at all: TCP protocol stacks do that. It would have been a lot more useful if they had just let the original ConnectException be thrown, or at least used its error message and let it appear in the stack trace.)

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