AssertionError

[François Birot]

>I have a Plone site that works well without using ZEO.
>Yet since I've installed ZEO I've got an assertion error message when I try to add plone pages in my folder.
I've tested it on two different servers with Zope 2.9.5 and I always get this error. If I keep the exact same config but remove the ZEO, it works again.
>
>I've read that someone had a similar error using Zope 3 (http://mail.zope.org/pipermail/zope3-users/2006-July/003833.html). I've tried like him to change at line 367 of lib/python/ZEO/cache.py the "cur_tid < tid" to "cur_tid <= tid" and now i don't have the assertionError anymore.
>But I wonder if this is a reliable change.

>Traceback (innermost last):
>Module ZPublisher.Publish, line 121, in publish
>Module Zope2.App.startup, line 240, in commit
>Module transaction._manager, line 96, in commit
>Module transaction._transaction, line 380, in commit
>Module transaction._transaction, line 378, in commit
>Module transaction._transaction, line 441, in _commitResources
>Module ZODB.Connection, line 679, in tpc_finish
>Module ZEO.ClientStorage, line 974, in tpc_finish
>Module ZEO.ClientStorage, line 999, in _update_cache
>Module ZEO.cache, line 367, in invalidate
>AssertionError

[Tres Seaver (tseaver)]

Status: Pending => Accepted

 Supporters added: rocky

This is a bug in the "python package as products" support currently
within Five: it is trying to commit transactions within the
'initialize' call of Five, which *must not happen.*

Rocky, can you work out out to preserve the real feature without
opening a new database connection?

[Andreas Jung (ajung)]

Changes: submitter email, edited transcript, importance (critical => medium)

[Andreas Jung (ajung)]

Please check if the problem persists and if it is reproducable

[François Birot (biroto)]

"Please check if the problem persists and if it is reproducable"
--> Yes it is, I've tried it on two different servers with Zope 2.9.5 and 2.9.7.

I've just tried to remove Five and indeed I don't have the error anymore.

[Wichert Akkerman (wichert)]

This may be fixed in Zope 2.10.4; there are several fixes in that release that help with ZEO and packages-as-products.

[panjunyong (panjunyong)]

I am using Zope 2.10.5, and this problem still exists. :-C

[Christian Theune (ctheune)]

This is a duplicate of a ZODB bug that was fixed very recently. I'm connecting this bug as a duplicate.

[Andreas Jung (ajung)]

So this bug is fixed on the ZODB 3.7 branch as well?
If yes: Zope 2.10 still uses ZODB 3.7.1 (although there is already ZODB 3.7.2). For Zope 2.10.6 will have to create a new
ZODB 3.7.3 release and update the SVN:externals.