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https://issues.apache.org/jira/browse/HDFS-15821?focusedWorklogId=552622&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-552622
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ASF GitHub Bot logged work on HDFS-15821:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 15/Feb/21 17:13
            Start Date: 15/Feb/21 17:13
    Worklog Time Spent: 10m 
      Work Description: jbrennan333 commented on pull request #2690:
URL: https://github.com/apache/hadoop/pull/2690#issuecomment-779355481


   @zehaoc2 verified that if he builds hadoop before running the failed 
hadoop-hdfs-rbf tests, it does not fail.
   


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

    Worklog Id:     (was: 552622)
    Time Spent: 1h 10m  (was: 1h)

> Add metrics for in-service datanodes
> ------------------------------------
>
>                 Key: HDFS-15821
>                 URL: https://issues.apache.org/jira/browse/HDFS-15821
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Zehao Chen
>            Assignee: Zehao Chen
>            Priority: Minor
>              Labels: pull-request-available
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> We currently have metrics for live datanodes but some of the datanodes may be 
> in decommissioning state or maintenance state. Adding this metric allows us 
> to know how many nodes are currently in service, where NumInServiceDatanodes 
> = NumLiveDataNodes - NumDecomLiveDataNodes - NumInMaintenanceLiveDataNodes.



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