[infinispan-dev] deadlock detection - coin toss

[David M. Lloyd]

On 07/08/2009 11:11 AM, Mircea Markus wrote:
> this is regarding: http://tinyurl.com/nunmyu
> In order to be able to determine which tx should commit and which will 
> rollback, I need to generate a coin toss for each node - a random number.
> In order to do that I'm thinking to use on of the following:
> 
> 1) use java.util.Random . The issue with this class is that it has an 
> undocumented behavior when it comes to concurrent access, so I cannot 
> rely on it behaving correctly if  I don't  enforce proper 
> synchronization. I'm afraid this might become a bottleneck as all the 
> prepapares requests might want to synchronize on it.

What about a ThreadLocal<Random>?  Should be quick-ish

- DML