JDBC Connection gets closed just after it is created.

[pranesh yelkur]

My application is using following way to create a statement through a connection.
1: Connection conn = null;
2: try {
3: conn = ServerUtil.getConnection();
4: ps = conn.prepareStatement(sql.toString());
5: :
6: :
7: } catch {
8: }
9: finally {
10: ServerUtil.releaseConnection();
11: }

ServerUtil is a utility class which provides method to get instance of connection and closing the connection.
But sometimes the application throws SQLException at line number 4 saying that connection is already closed.

The application is deployed in JBoss server and the ServerUtil class is getting connection from some connection pool.

Please reply back in case you need more information.
Waiting for reply.

With Regards
Pranesh Yelkur

[Balu Sadhasivam]

Pranesh,

ServerUtil class is getting connection from some connection pool.

We cant guess whats your ServerUtil class does. Post the class.

ServerUtil.getConnection(); 

I suspect the connection (conn) returned from getConnection() does not have proper mechanism to handle when connection object is closed. It should check for something like this and this might be missing in your ServerUtil class

if(conn == null)
 // getConnection
else
  return conn

[Scott Selikoff]

I agree, it sounds like ServerUtil is the problem. In normal JDBC code, once you get a connection it shouldn't be immediately closed on the next line.