For locally originating txs (on the sender - if the sender has locked the tree to prepare state) this is correct. Still though, if (due to network lag) the receiver receives the prepare() before the state, the prepare() will lock the tree. Are you referring to started transactions started locally on the joiner? I don't see how this could happen anyway... -- Manik Surtani Lead, JBoss Cache JBoss, a division of Red Hat Email: manik(a)jboss.org <mailto:manik@jboss.org> Telephone: +44 7786 702 706 MSN: manik(a)surtani.org <mailto:manik@surtani.org> Yahoo/AIM/Skype: maniksurtani On 13 Sep 2006, at 13:10, Bela Ban wrote: > Guys, > > if we use optimistic locking, I think we would *not* need to do this > for locally started transactions, correct ? The workspaces which > contain the work of the local transactions would simply be blocked > when they try to start the 2PC (until state transfer is over), but we > would not need to discard them. > > Is this correct ? > -- > Bela Ban > Lead JGroups / Manager JBoss Clustering Group > JBoss - a division of Red Hat >