Sure. That helps, Mahadev. Can I assume that async requests from different zk handles don't have guaranteed order of execution ?
On Mon, Dec 26, 2011 at 4:23 PM, Mahadev Konar <maha...@hortonworks.com>wrote: > Ted, > ZK does not re order async requests. They will be executed in the > same order as you call them from the same zk handle. Does that help? > > thanks > mahadev > > On Fri, Dec 23, 2011 at 10:43 AM, Ted Yu <yuzhih...@gmail.com> wrote: > > The requests come from same zhandle. > > > > Cheers > > > > On Thu, Dec 22, 2011 at 6:09 PM, Ted Yu <yuzhih...@gmail.com> wrote: > > > >> Hi, > >> The following originated from discussion on a feature in HBase which > >> relies on zookeeper for coordination. > >> > >> A task is removed from the tasks map. An async ZK request is pending to > >> remove the task's zk node. > >> > >> Another request arrives for this to-be-deleted task. A new in-memory > >> task structure is created. A ZK request is scheduled to create the same > >> task node. > >> > >> Problem will only occur if create-node executes before delete-node in > >> ZK. (If create-node returns NODEEXISTS then we treat that as success). > >> > >> Does ZK re-order async requests? > >> > >> Thanks > >> >
