[ZODB-Dev] [ZODB3.1] easily reproducible deadlock

[Shane Hathaway]

On Sun, 7 Dec 2003, Christian Robottom Reis wrote:

> Hmm, are we talking about instantiating two *ClientStorages* in-process?
> 
> I open multiple connections to the same storage all the time, AFAIUI,
> but that's a matter of calling db.open() multiple times.

I believe Dieter is talking about creating two ClientStorages that point
to the same ZEO database and attempting to commit changes on both storages
in a single transaction.  The ZEO server will try to acquire a lock on the
storage twice, resulting in a deadlock.  Note that ZEO has some machinery 
for breaking locks after a timeout, but that won't work for Dieter.

Shane