Jonathan Hurley updated AMBARI-18591:
    Status: Patch Available  (was: Open)

> Hive Rolling Upgrade Is No Longer Supported In Ambari
> -----------------------------------------------------
>                 Key: AMBARI-18591
>                 URL: https://issues.apache.org/jira/browse/AMBARI-18591
>             Project: Ambari
>          Issue Type: Task
>          Components: ambari-server
>    Affects Versions: 2.5.0
>            Reporter: Jonathan Hurley
>            Assignee: Jonathan Hurley
>            Priority: Critical
>             Fix For: 2.5.0
>         Attachments: AMBARI-18591.patch
> HS2 RU expects all users to be using zookeeper based JDBC URLs. However, few 
> users are using these new Zookeeper discovery urls and they use the old 
> format, directly specifying the hostname and port number for the HS2 instance 
> it connects to. During RU, the HS2 port number changes and users using old 
> url have an outage.  Hive needs to be able to support RU without changing the 
> port.
> Due to too many Hive Client user outages as a result of the RU workflow for 
> HIve, the decision is to just change RU to bounce the HS2 process, knowing 
> that there will be down time and causing all active queries to fail.  So the 
> runbook for the HS2 process will look like:
> * We will no longer change the Hive port at all during either RU or EU.
> * During an RU, we will present a message if Hive is present that indicates 
> that Hive is not rolling and it will be taken down.
> * Run the Hive deregister command to remove the ZK entries for the Hive 
> Servers
> * Hive will be shutdown, without draining, during an RU and a new instance 
> started up on the same port.
> In addition, we need to remove the warnings that were added as part of 
> AMBARI-17319.

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