CDH 15 is released as mentioned in the below link
But in the maven central repo I am not able to see any hbase-client specific to CDH 15. The latest available is 5.14.2.
Are we supposed to use 5.14.2 clients with CDH 15 ? I could not find anything related to this in documentation.
mvnrepository.com is an aggregator site, and Cloudera doesn't have control over how often they collect the artifacts.
In the same time, please read this article about using Cloudera's own maven repository: https://www.cloudera.com/documentation/enterprise/release-notes/topics/cdh_vd_cdh5_maven_repo.html