+1 for deprecating ZKConnectionRegistry beginning with/in 2.6.0.
On Thu, Feb 29, 2024 at 2:30 AM Nick Dimiduk <ndimi...@apache.org> wrote: > Heya, > > We have long had the ambition to get away from ZooKeeper as the means by > which a client interfaces with an HBase cluster. The ConnectionRegistry was > introduced in 2.0 as part of the asynchronous client implementation [0], > then called the ClusterRegistry. The name changed and a new implementation > backed by an HMaster endpoint was introduced, called the > MasterConnectionRegistry. That implementation was made more generic as the > RpcConnectionRegistry, which can be backed by HMaster or RegionServer > processes. Finally, many of the teething issues [1] with the > RpcConnectionRegistry have been worked out. As of now, > RpcConnectionRegistry is the default path for client cluster access on > branch-3 [2]. > > With 2.6 upon us, we'd like to formalize the deprecation cycle for client > implementations connecting to a cluster using the ZKConnectionRegistry. > > I have been using the RpcConnectionRegistry in several deployments since > the 2.4 release line. In a deployment without using secured connections, > it's a drop-in replacement. For secured deployments, it's simpler, because > clients don't need to be granted ZooKeeper connection credentials. Movement > of RPC burden from the ZooKeeper cluster to Region Servers is really nice > for spreading out the load. > > Maybe others have deployed the feature as well and have some experience to > report back? > > Based on my experience, I am in favor of marking ZKConnectionRegistry as > Deprecated starting in 2.6 with a plan to remove it in 3.1 ... or 3.2 if > necessary. > > What do you say? Any objections? > > Thanks, > Nick > > [0]: https://issues.apache.org/jira/browse/HBASE-15921 > [1]: https://issues.apache.org/jira/browse/HBASE-26149 > [2]: https://issues.apache.org/jira/browse/HBASE-26174 > -- Best regards, Andrew Unrest, ignorance distilled, nihilistic imbeciles - It's what we’ve earned Welcome, apocalypse, what’s taken you so long? Bring us the fitting end that we’ve been counting on - A23, Welcome, Apocalypse
