Sumit Gupta created KNOX-570:
--------------------------------
Summary: Knox support for HiveServer2 HA
Key: KNOX-570
URL: https://issues.apache.org/jira/browse/KNOX-570
Project: Apache Knox
Issue Type: New Feature
Components: Server
Affects Versions: 0.7.0
Reporter: Sumit Gupta
Assignee: Sumit Gupta
Fix For: 0.7.0
As of Knox 0.5.0, support for WebHDFS HA is available through configuration of
a HA provider and multiple URLs specified for the WEBHDFS service. There is a
desire to provide similar support in Knox for HiveServer2 HA.
HiveServer2 HA has a different implementation than WebHDFS HA in that the
server information is meant to be looked up via Zookeeper. The configuration
information involved is typically a Zookeeper ensemble and a Zookeeper
namespace to lookup the registered HiveServer2 information. The JDBC client
(Hive) today uses this looked up information to randomly pick a server to then
send the actual request to. In a failover scenario, the client also keeps track
of the server that has failed and picks another server at random from the list
of servers retrieved from Zookeeper. Logic similar to this can be implemented
in Knox in a specialized Dispatch class so that the client connecting to Knox
does not have to deal with HA gymnastics.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
