Now i see. So, may be i should drop the ticket and pick smth else ? пт, 19 мая 2017 г. в 13:20, Alexey Goncharuk <alexey.goncha...@gmail.com>:
> As I described before, one of the reasons behind the waiting is to switch > primary nodes to prevent two simultaneous lock owners. > > Consider the following scenario: > * Client node c1 acquired a lock L1 on node A > * Topology changes and primary node for L1 is now new joined node B > * Client node c2 wants to acquire lock L1 and sends lock request to B > * Node B successfully grants the lock to c2 because it does not know about > the previous lock > * Two threads now hold the lock > > There is a theoretical possibility of transferring lock ownership > information during rebalancing, but this opens up whole lot new race > conditions and failover difficulties. > > > 2017-05-19 12:52 GMT+03:00 Дмитрий Рябов <somefire...@gmail.com>: > > > May be let second node to finish join and enter the ring, but start > > rebalance after all lock will be released. > > > > 2017-05-19 12:30 GMT+03:00 ALEKSEY KUZNETSOV <alkuznetsov...@gmail.com>: > > > > > If we acquired a lock and a new node is joining cluster, should it wait > > for > > > lock release? > > > May be it could proceed joining ? > > > The question comes from my ticket > > > https://issues.apache.org/jira/browse/IGNITE-2671 > > > > > > чт, 18 мая 2017 г. в 20:05, Alexey Goncharuk < > alexey.goncha...@gmail.com > > >: > > > > > > > Hi Aleksey, > > > > > > > > The main purpose of this method is to wait for all ongoing updates > > > > (transactional and atomic), initiated on the previous topology > version, > > > to > > > > finish to prevent inconsistencies during rebalancing and to prevent > two > > > > different simultaneous owners of the same lock. > > > > > > > > We will be adding documentation pages on Apache Ignite wiki which > will > > > > explain transactions mechanics in greater detail. > > > > > > > > Hope this helps, > > > > AG > > > > > > > > 2017-05-18 16:50 GMT+03:00 ALEKSEY KUZNETSOV < > alkuznetsov...@gmail.com > > >: > > > > > > > > > Hi Igntrs! > > > > > What is the point of waiting partition release in the end of > > > > > GridDhtPartitionsExchangeFuture#init() method ? > > > > > In what scenarious do we need it ? > > > > > -- > > > > > > > > > > *Best Regards,* > > > > > > > > > > *Kuznetsov Aleksey* > > > > > > > > > > > > -- > > > > > > *Best Regards,* > > > > > > *Kuznetsov Aleksey* > > > > > > -- *Best Regards,* *Kuznetsov Aleksey*
