[ZODB-Dev] what the transaction messages mean?

[Jeremy Hylton]

Guido observed that ZODB is not particularly robust about failures that
occur during the second phase of the two-phase commit.  The transaction
manager does not have a recovery log or an API for inquiring about the
results of failed transaction.  So if the TM or a client fails during
the commit phase, the uncommitted clients have no way to find out that
the transaction committed.

Jeremy