What version of zope.session are you using? A fix (using zope.minmax) for ConflictErrors related to the update of access time on sessionData object was committed into zope.session in rev76899. Not sure if that solves this problem of conflict errors that you see, but if you are using a version of zope.session prior to r76899, upgrading may make those problems go away. Regards, Satchit On Oct 22, 2008, at 10:27 AM, Carsten Senger wrote:
Hermann Himmelbauer schrieb:
Yes, I can reproduce this any time. But I looked into it further, and it's quite weird:
- If I access the site without having logged in (= a new cookie/ session is created), it does not happen. - If I login, pressing F5 rapidly triggers these warnings. - BUT: If I logout and press F5, the warnings are still there. - If I close the browser/reopen it (-> New session), the warning is gone.
So it seems, once the session stores/has stored login information, this object leads to a conflict. Interesting - but I still don't know what this object is.
You should inspect what happens in zope.session to find out what happens there. From your description and the purpose of sessions probably this happens:
Everytime you access you site the session is checked for authentication informations. Sessions have a set timeout. zope.session has to write a new timestamp into the session so it can drop the session after the timeout. This can cause conflicts. When you log out the authentication informations are removed from the session, but the cookie an the server side session are still there. The timestamp is updated with every request. If you close your browser the cookie is removed by the browser. Until you authenticate zope does not create a new session/set a new cookie.
I'm quite sure that you can't get conflicts with zope.session if you use two different sessions at the same time and conflicts with one session are rare enough and with zope's conflict resolution no problem (unless you press F5 really fast)
..Carsten
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