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https://issues.apache.org/jira/browse/HDFS-1584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12983466#action_12983466
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Kan Zhang commented on HDFS-1584:
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attached a trivial that does the checking and renew if needed.
> Need to check TGT and renew if needed when fetching delegation tokens using
> HFTP
> --------------------------------------------------------------------------------
>
> Key: HDFS-1584
> URL: https://issues.apache.org/jira/browse/HDFS-1584
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: security
> Reporter: Kan Zhang
> Assignee: Kan Zhang
> Attachments: h1584-01.patch
>
>
> Currently, there is no checking on TGT validity when calling
> getDelegationToken(). The TGT may expire and the call will fail.
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