[jira] [Assigned] (HIVE-17609) Tool to manipulate delegation tokens

["Mithun Radhakrishnan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-17609?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mithun Radhakrishnan reassigned HIVE-17609:
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> 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
>
> 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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