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https://issues.apache.org/jira/browse/HADOOP-18167?focusedWorklogId=758077&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-758077
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ASF GitHub Bot logged work on HADOOP-18167:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 18/Apr/22 19:17
            Start Date: 18/Apr/22 19:17
    Worklog Time Spent: 10m 
      Work Description: hchaverri commented on code in PR #4092:
URL: https://github.com/apache/hadoop/pull/4092#discussion_r852347474


##########
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/token/delegation/AbstractDelegationTokenSecretManager.java:
##########
@@ -825,4 +859,68 @@ protected void syncTokenOwnerStats() {
       addTokenForOwnerStats(id);
     }
   }
+
+  /**
+   * DelegationTokenSecretManagerMetrics tracks token management operations
+   * and publishes them through the metrics interfaces.
+   */
+  @Metrics(about="Delegation token secret manager metrics", context="token")
+  static class DelegationTokenSecretManagerMetrics implements 
IOStatisticsSource {
+    private static final Logger LOG = 
LoggerFactory.getLogger(DelegationTokenSecretManagerMetrics.class);
+
+    final static String STORE_TOKEN_STAT = "storeToken";
+    final static String UPDATE_TOKEN_STAT = "updateToken";
+    final static String REMOVE_TOKEN_STAT = "removeToken";
+    final static String TOKEN_FAILURE_STAT = "tokenFailure";
+
+    final MetricsRegistry registry;
+    final IOStatisticsStore ioStatistics;
+
+    @Metric("Rate of storage of delegation tokens and latency (milliseconds)")
+    MutableRate storeToken;
+    @Metric("Rate of update of delegation tokens and latency (milliseconds)")
+    MutableRate updateToken;
+    @Metric("Rate of removal of delegation tokens and latency (milliseconds)")
+    MutableRate removeToken;
+    @Metric("Counter of delegation tokens operation failures")
+    MutableCounterLong tokenFailure;
+
+    static DelegationTokenSecretManagerMetrics create() {
+      return DefaultMetricsSystem.instance().register(new 
DelegationTokenSecretManagerMetrics());
+    }
+
+    public DelegationTokenSecretManagerMetrics() {
+      ioStatistics = iostatisticsStore()

Review Comment:
   Removed static import





Issue Time Tracking
-------------------

    Worklog Id:     (was: 758077)
    Time Spent: 3h 40m  (was: 3.5h)

> 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
>              Labels: pull-request-available
>         Attachments: HADOOP-18167-branch-2.10-2.patch, 
> HADOOP-18167-branch-2.10-3.patch, HADOOP-18167-branch-2.10.patch
>
>          Time Spent: 3h 40m
>  Remaining Estimate: 0h
>
> 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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