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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HIVE-16777) LLAP: Use separate tokens and UGI instances when an external client is used
Date Sat, 27 May 2017 00:09:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16027050#comment-16027050
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Sergey Shelukhin edited comment on HIVE-16777 at 5/27/17 12:08 AM:
-------------------------------------------------------------------

+1 as a quick fix... however
1) it would be better to add field to the protocol promising single AM (or not, as in case
with external interface); relying on external flag itself is hacky since, potentially, other
clients could use external record reader from a single "AM", allowing them to utilize the
UGI pool.
2) also, the comment might not be correct w.r.t. it being temporary; even if Spark thing uses
a single port per instance, it can still have multiple spark tasks for the same query as far
as I understand. That would make this solution permanent :) 


was (Author: sershe):
+1 as a quick fix... however
1) it would be better to add field to the protocol promising single AM (or not, as in case
with external interface); relying on external flag itself is hacky.
2) also, the comment might not be correct w.r.t. it being temporary; even if Spark thing uses
a single port per instance, it can still have multiple spark tasks for the same query as far
as I understand. That would make this solution permanent :) 

> LLAP: Use separate tokens and UGI instances when an external client is used
> ---------------------------------------------------------------------------
>
>                 Key: HIVE-16777
>                 URL: https://issues.apache.org/jira/browse/HIVE-16777
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>         Attachments: HIVE-16777.01.patch
>
>
> Otherwise leads to errors since the token is shared, and there's different nodes running
Umbilical.



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