Hello everybody.
I'm using Hibernate and C3P0 in my Content Management System.
I have installed 4 instances of the CMS to mantain 4 web sites. The java under each application is obiously the same while the static files and the db (mysql) are differentiated for every instance.

Under Tomcat, when I start the server, I'm receiving this warning at the startup of every app but the first, so from the second app to the last:



Since only the first app doesn't cast this warning it is obvious that the next instances try to create their C3P0Registry and C3P0 complains about it.

The awful drawback of the problem is that the applications crash since memory leak...

I've tried to google the problem but I cannot find any good answer to configure my applications or C3P0 or Hibernate or Tomcat to work properly...

I feel that the problem has a very simple solution but I cannot find it, does anyone of you have any idea?

thank you in advance
bluedog

Hello,
I'm having a similar problem, and I was wondering if you ever came upon a solution. Thanks for any advice!
-Evan

To avoid the creation of multiple instances of C3P0Registry, just add this line at your c3p0.properties file:

com.mchange.v2.c3p0.management.ManagementCoordinator=com.mchange.v2.c3p0.management.NullManagementCoordinator

if you are experiencing memory leak problems, however, this won't resolve the situation. In my post I supposed that the crashes I had were a direct effetct of the wrong management of C3P0, but it turned not to be the real issue.

hope it helps
cheers

thanks so much for your quick reply. I do also have a memory leak, but I think I'm on the path to figuring it out. But it's good to know how to fix this error message, and it helps to isolate that it is not the cause of my other problems. Thanks again for you help!