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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-10574) Metastore to handle expired tokens inline
Date Wed, 20 Jul 2016 16:10:21 GMT

    [ https://issues.apache.org/jira/browse/HIVE-10574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15386117#comment-15386117
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Aihua Xu commented on HIVE-10574:
---------------------------------

I spent some time understanding the logic. Seems like we are only doing the token validation
when the client connects to the metastore. After the client gets the token, it's free to talk
to metastore, while the token could have expired. 

To fully solve the issue, similar to http request, we need to carry token for each request
to the metastore, the metastore needs to validate the token before processing each request.
If the token is expired, then the client should get notified and try to get a new token. If
the token is near-expired (e.g., half-way of the token life time), then we should renew the
token to expend to a full life time. 

Hope it makes sense.

> Metastore to handle expired tokens inline
> -----------------------------------------
>
>                 Key: HIVE-10574
>                 URL: https://issues.apache.org/jira/browse/HIVE-10574
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore
>            Reporter: Xuefu Zhang
>            Assignee: Aihua Xu
>
> This is a followup for HIVE-9625.
> Metastore has a garbage collection thread that removes expired tokens. However that still
leaves a window (1 hour by default) where clients could retrieve a token that's expired or
about to expire. An option is for metastore handle expired tokens inline. 



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