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https://issues.apache.org/jira/browse/HADOOP-18167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17510424#comment-17510424
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Steve Loughran commented on HADOOP-18167:
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might be nice to have it implement IOStatistic and so collect per instance
stats which can be aggregated/reported
> Add metrics to track delegation token secret manager operations
> ---------------------------------------------------------------
>
> Key: HADOOP-18167
> URL: https://issues.apache.org/jira/browse/HADOOP-18167
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Hector Sandoval Chaverri
> Priority: Major
>
> New metrics to track operations that store, update and remove delegation
> tokens in implementations of AbstractDelegationTokenSecretManager. This will
> help evaluate the impact of using different secret managers and add
> optimizations.
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