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https://issues.apache.org/jira/browse/HDFS-14400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16808068#comment-16808068
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Karthik Palanisamy commented on HDFS-14400:
-------------------------------------------

Thanks for the confirmation [~goiri].

I thought it is point to current expired heartbeats but as it meant to total 
expired heartbeats.

Let me resolve this JIRA as Invalid. 

> Namenode ExpiredHeartbeats metric
> ---------------------------------
>
>                 Key: HDFS-14400
>                 URL: https://issues.apache.org/jira/browse/HDFS-14400
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs
>    Affects Versions: 3.1.2
>            Reporter: Karthik Palanisamy
>            Assignee: Karthik Palanisamy
>            Priority: Minor
>         Attachments: HDFS-14400-001.patch, HDFS-14400-002.patch, 
> HDFS-14400-003.patch
>
>
> Noticed incorrect value in ExpiredHeartbeats metrics under namenode JMX.
> We will increment ExpiredHeartbeats count when Datanode is dead but somehow 
> we missed to decrement when datanode is alive back.
> {code}
> { "name" : "Hadoop:service=NameNode,name=FSNamesystem", "modelerType" : 
> "FSNamesystem", "tag.Context" : "dfs", "tag.TotalSyncTimes" : "7 ", 
> "tag.HAState" : "active", ... "ExpiredHeartbeats" : 2, ... }
> {code}
>  



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