[jira] Commented: (HIVE-80) Allow Hive Server to run multiple queries simulteneously

["Arvind Prabhakar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-80?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12867693#action_12867693 ] 

Arvind Prabhakar commented on HIVE-80:
--------------------------------------

I wanted to fix this JIRA and so started looking at it. From what I have observed it appears that the {{HiveServer}} *is* multi-thread capable. Specifically:

* The {{HiveServer}} is using a {{TThreadPoolServer}} which is multi-threaded.
* The {{ThriftHiveProcessorFactory}} overrides the {{getProcessor()}} call and returns a new instance of {{HiveServerHandler}} on every invokation.
* Every instance of {{HiveServerHandler}} has its own thread local session state and a private driver instance.
* Query execution is thread safe thanks to HIVE-77.

Give the above, I believe that this JIRA should be marked closed and resolved. If you think I missed something in my analysis, can you please point that out?

> Allow Hive Server to run multiple queries simulteneously
> --------------------------------------------------------
>
>                 Key: HIVE-80
>                 URL: https://issues.apache.org/jira/browse/HIVE-80
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Server Infrastructure
>            Reporter: Raghotham Murthy
>            Assignee: Neil Conway
>            Priority: Critical
>         Attachments: hive_input_format_race-2.patch
>
>
> Can use one driver object per query.

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