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From "David Jencks (JIRA)" <>
Subject [jira] Created: (GERONIMO-2491) Hibernate passes connections between servlets which we don't support
Date Thu, 12 Oct 2006 21:15:36 GMT
Hibernate passes connections between servlets which we don't support

                 Key: GERONIMO-2491
             Project: Geronimo
          Issue Type: Bug
      Security Level: public (Regular issues)
          Components: connector
    Affects Versions: 1.1.1, 1.2
            Reporter: David Jencks
         Assigned To: David Jencks
             Fix For: 1.1.2, 1.2

This is based on examination of roller running in geronimo-tomcat and is partly speculation.
 There's certainly  a problem.

1. request sets InstanceContext 1 in ConnectionTrackingCoordinator.
2. roller starts a persistence context (in hibernate jargon a session) in a servlet filter.
 No connection is opened yet
3. tiles dispatches to a jsp
4. dispatch sets InstanceContext 2 in CTC
5. jsp does something persistent causing hibernate to open a db connection.  This is registered
with IC 2.
6. jsp dispatch returns, so IC 1 is set in CTC
7. roller commits the persistence context in the servlet filter, which closes the connection.
 Closing the connection attempts to unregister from the current IC.  IC 1 doesn't know anything
about this connection..... we get an NPE.

The solution isn't clear to me at the moment.  

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