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Posted to hdfs-dev@hadoop.apache.org by "Karthik Palanisamy (JIRA)" <ji...@apache.org> on 2019/03/30 01:24:00 UTC

[jira] [Created] (HDFS-14400) Namenode ExpiredHeartbeats metric

Karthik Palanisamy created HDFS-14400:
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             Summary: 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


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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