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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-18281) HiveServer2 HA for LLAP and Workload Manager
Date Thu, 15 Mar 2018 07:02:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-18281?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Prasanth Jayachandran updated HIVE-18281:
-----------------------------------------
    Attachment: HIVE-18281.5.patch

> HiveServer2 HA for LLAP and Workload Manager
> --------------------------------------------
>
>                 Key: HIVE-18281
>                 URL: https://issues.apache.org/jira/browse/HIVE-18281
>             Project: Hive
>          Issue Type: New Feature
>    Affects Versions: 3.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Major
>         Attachments: HIVE-18281.1.patch, HIVE-18281.2.patch, HIVE-18281.4.patch, HIVE-18281.5.patch,
HIVE-18281.6.patch, HIVE-18281.WIP.patch, HSI-HA.pdf
>
>
> When running HS2 with LLAP and Workload Manager, HS2 becomes single point of failure
as some of the states for workload management and scheduling are maintained in-memory. 
> The proposal is to support Active/Passive mode of high availability in which, all HS2
and tez AMs registers with ZooKeeper and a leader have to be chosen which will maintain stateful
information. Clients using service discovery will always connect to the leader for submitting
queries. There will also be some responsibilities for the leader, failover handling, tez session
reconnect etc. Will upload some more detailed information in a separate doc. 



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