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https://issues.apache.org/jira/browse/HIVE-17609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16197661#comment-16197661
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Mithun Radhakrishnan commented on HIVE-17609:
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Committed to {{master}}, {{branch-2}}, and {{branch-2.2}}.
> 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
> 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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