[Zope] Strange TransactionError in ZODB

[Dieter Maurer]

Harald Koschinski writes:
 >                   TransactionError
I have seen this error several times:

 * we use Zope with Oracle and ZOracleDA

   when the Oracle database gets problems (what happens not
   too rarely, unfortunately), then we may see this problem.

   We then fix the Oracle problem, restart Zope and
   everything works great again


 * with an early release of FSSession, we saw this
   problem regularly: every time, when the same
   session object was accessed concurrently,
   e.g. from a frame set.


The cause was in all cases an exception raised during
the second phase of the two phase commit.



Dieter