On Apr 21, 2006, at 3:42 PM, Jesus Cea wrote:

> That is:
>
> 1. Client A fetch object X.
> 2. Client B modifies and commits a new version of X.
> 3. Client A, using data in cached object X, modifies an object Y.
> 4. Client A commits an stale Y.

Step 4 raises a ConflictError.

Client A can either crash or catch the exception.
Usually, we want it to catch the exception and
call abort(), so that the changes to Y are erased,
and then start again at step 1.