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https://issues.apache.org/jira/browse/HADOOP-14987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16238526#comment-16238526
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Xiaoyu Yao commented on HADOOP-14987:
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No worries, let's save Jenkins from another run just to verify removing the
unused import. I will do local build along with checkstyle check.
+1 for the v5 patch and I will remove the unused import when committing.
> Improve KMSClientProvider log around delegation token checking
> --------------------------------------------------------------
>
> Key: HADOOP-14987
> URL: https://issues.apache.org/jira/browse/HADOOP-14987
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 2.7.3
> Reporter: Xiaoyu Yao
> Assignee: Xiaoyu Yao
> Priority: Major
> Attachments: HADOOP-14987.001.patch, HADOOP-14987.002.patch,
> HADOOP-14987.003.patch, HADOOP-14987.004.patch, HADOOP-14987.005.patch
>
>
> KMSClientProvider#containsKmsDt uses SecurityUtil.buildTokenService(addr) to
> build the key to look for KMS-DT from the UGI's token map. The token lookup
> key here varies depending on the KMSClientProvider's configuration value for
> hadoop.security.token.service.use_ip. In certain cases, the token obtained
> with non-matching hadoop.security.token.service.use_ip setting will not be
> recognized by KMSClientProvider. This ticket is opened to improve logs for
> troubleshooting KMS delegation token related issues like this.
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