"bstansberry(a)jboss.com" wrote : | Manik, why is the removeNode call not removing the node? Is the MVCC code detecting that the node didn't exist when the get() call happened and therefore turning the removeNode into a no-op? | Yes. This is consistent with R_R semantics in that you only modify data that you read. Now if write skew detection was enabled (by setting writeSkewCheck to true) this case would throw a DataVersioningException. See [1] for details on write skews. And contrary to what the docs say, writeSkewCheck is false by default. [1] http://www.jboss.org/file-access/default/members/jbosscache/freezone/docs... (See section on write skews) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4218705#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...