Review Request 38100: After stopping Ambari Metrics some dfs/FSNamesystem properties are missing

[Vitalyi Brodetskyi]

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https://reviews.apache.org/r/38100/
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Review request for Ambari, Andrew Onischuk and Dmytro Sen.


Bugs: AMBARI-12993
    https://issues.apache.org/jira/browse/AMBARI-12993


Repository: ambari


Description
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*Ambari Metrics is started:*
metrics from NameNode:


"metrics" : {
        "dfs" : {
          "FSNamesystem" : {
            "BlockCapacity" : 2097152,
            "BlocksTotal" : 35,
            "CapacityNonDFSUsed" : 93786386432,
            "CapacityRemaining" : 1477442187264,
            "CapacityRemainingGB" : 1376.0,
            "CapacityTotal" : 1572626841600,
            "CapacityTotalGB" : 1465.0,
            "CapacityUsed" : 1398267904,
            "CapacityUsedGB" : 1.0,
            "CorruptBlocks" : 0,
            "ExcessBlocks" : 0,
            "ExpiredHeartbeats" : 0.0,
            "FilesTotal" : 91,
            "HAState" : "active",
            "LastCheckpointTime" : 1.44079309E12,
            "LastWrittenTransactionId" : 3825.0,
            "MillisSinceLastLoadedEdits" : 119469.0,
            "MissingBlocks" : 0,
            "MissingReplOneBlocks" : 0.0,
            "PendingDataNodeMessageCount" : 0.0,
            "PendingDeletionBlocks" : 0,
            "PendingReplicationBlocks" : 0,
            "PostponedMisreplicatedBlocks" : 0.0,
            "ScheduledReplicationBlocks" : 0,
            "Snapshots" : 0.0,
            "SnapshottableDirectories" : 0.0,
            "StaleDataNodes" : 0.0,
            "TotalFiles" : 91.0,
            "TotalLoad" : 6,
            "TransactionsSinceLastCheckpoint" : 700.0,
            "TransactionsSinceLastLogRoll" : 0.0,
            "UnderReplicatedBlocks" : 4
          }
        }
      }


*Ambari Metrics is stopped:*
metrics from NameNode:

"metrics" : {
        "dfs" : {
          "FSNamesystem" : {
            "BlockCapacity" : 2097152,
            "BlocksTotal" : 35,
            "CapacityNonDFSUsed" : 93781352448,
            "CapacityRemaining" : 1477447221248,
            "CapacityRemainingGB" : 1376.0,
            "CapacityTotal" : 1572626841600,
            "CapacityTotalGB" : 1465.0,
            "CapacityUsed" : 1398267904,
            "CapacityUsedGB" : 1.0,
            "CorruptBlocks" : 0,
            "ExcessBlocks" : 0,
            "FilesTotal" : 91,
            "HAState" : "active",
            "MissingBlocks" : 0,
            "PendingDeletionBlocks" : 0,
            "PendingReplicationBlocks" : 0,
            "ScheduledReplicationBlocks" : 0,
            "TotalLoad" : 6,
            "UnderReplicatedBlocks" : 4
          }
        }
      }


Diffs
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  ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/metrics.json 
b1e95fe 

Diff: https://reviews.apache.org/r/38100/diff/


Testing
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mvn clean test


Thanks,

Vitalyi Brodetskyi