Error during ADF Security logout in 12c

Question

Hello,
I'm in the process of migrating my application from 11.1.2.4 to 12.1.2.0, and one thing I've noticed is the following error message in the weblogic logs when logging out of ADF Security:
<Error> <oracle.adf.share.http.HttpSessionScopeAdapter> <BEA-000000> <HttpSessionScopeAdapter:  Request is in an invalid state.  Could not access the request session.>
The logout still seems to work fine however. Currently I'm logging out with the following code (from here):
ExternalContext ectx = FacesContext.getCurrentInstance().getExternalContext();
ectx.redirect(ectx.getRequestContextPath() + "/adfAuthentication?logout=true&end_url=/faces/home");
FacesContext.getCurrentInstance().responseComplete();
Every time I press logout, the above error happens 5 times in the logs.
I've also tried using the logout code from the 12c documentation and that produces the same error, but interestingly only produces that error 4 times.
Is there something extra or different that is supposed to be done to log out of ADF security in 12c? I can't imagine that getting an error repeatedly is what should be expected.
Thanks!

Answer 1

Hello,
I gave that idea a try, and it was the same result as the very similar manual logout code given in the documentation I tried earlier: http://docs.oracle.com/middleware/1212/adf/ADFFD/adding_security.htm#ADFFD21669
The logout happens successfully, but that error message shows up in the logs at least once. Whenever I do a logout without going through the authentication servlet, the error is always logged exactly 1 time fewer. In my application I migrated from 11gR2 to 12c, the error would happen 4 times (5 through the servlet), and in the fresh sample 12c app I made earlier this week, it happens 1 time (2 through the servlet).
I should also add that all of this testing has just been done in the integrated weblogic 12c server that comes with JDeveloper 12c.