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From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-17609) Tool to manipulate delegation tokens
Date Mon, 16 Oct 2017 21:02:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-17609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16206592#comment-16206592
] 

Lefty Leverenz commented on HIVE-17609:
---------------------------------------

Can this be documented on an existing wiki page, or does it need a page of its own with links
from other pages?

Added TODOC2.4 and TODOC2.2 labels (note that it's 2.2.1, not 2.2.0).

> Tool to manipulate delegation tokens
> ------------------------------------
>
>                 Key: HIVE-17609
>                 URL: https://issues.apache.org/jira/browse/HIVE-17609
>             Project: Hive
>          Issue Type: Improvement
>          Components: Metastore, Security
>    Affects Versions: 2.2.0, 3.0.0
>            Reporter: Mithun Radhakrishnan
>            Assignee: Mithun Radhakrishnan
>              Labels: TODOC2.2, TODOC2.4
>             Fix For: 3.0.0, 2.4.0, 2.2.1
>
>         Attachments: HIVE-17609.1-branch-2.2.patch, HIVE-17609.1-branch-2.patch, HIVE-17609.1.patch,
HIVE-17609.2.patch
>
>
> This was precipitated by OOZIE-2797. We had a case in production where the number of
active metastore delegation tokens outstripped the ZooKeeper {{jute.maxBuffer}} size. Delegation
tokens could neither be fetched, nor be cancelled. 
> The root-cause turned out to be a miscommunication, causing delegation tokens fetched
by Oozie *not* to be cancelled automatically from HCat. This was sorted out as part of OOZIE-2797.
> The issue exposed how poor the log-messages were, in the code pertaining to token fetch/cancellation.
We also found need for a tool to query/list/purge delegation tokens that might have expired
already. This patch introduces such a tool, and improves the log-messages.



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