Hi Daniel

Your example didn't make it. Can you resend it or attach it to the bugzilla entry:
http://issues.apache.org/bugzilla/show_bug.cgi?id=22079


Regards
Dirk


Daniel Bray (CAPE) wrote:


If I accidentally close DBCP connections twice, it will eventually cause the
JNDI datasource to start returning connections that are already closed.

Essentially my problem is this:

while (true)
{
 DataSource ds = getDataSourceFromJNDI();
 Connection conn = ds.getConnection();
 PreparedStatement ps = conn.prepareStatement("SELECT * FROM ......");
 ResultSet rs = ps.executeQuery();

 rs.close();
 ps.close();
 conn.close();

 // make the mistake of closing it twice
 conn.close();
}

Eventually getDataSourceFromJNDI() returns me a connection that's already
closed. In fact both it, and it's delegate, have the same object reference
IDs as the connections returned by the previous call.

This only happens if I use the connection to do something, and not if I just
create it and then close it.


I can always just wrap the connection in a proxy and then just not forward on the close call if it's already been closed, but I figure that someone out there might want to fix this properly and I can't find where I'm supposed to commit bugs.





This sort of problem is best described in code, so I'm attaching it below.
It's a simple enough servlet that exposes this problem.



from me, daniel.



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