Hadoop 4 true false false Hadoop false Hadoop:service=NameNode,name=ReplicatedBlocksState dynamic Hadoop LowRedundancyReplicatedBlocks 1 long 1 CorruptReplicatedBlocks 1 long 2 MissingReplicatedBlocks 1 long 3 MissingReplicationOneBlocks 1 long 4 BytesInFutureReplicatedBlocks 1 long 5 PendingDeletionReplicatedBlocks 1 long 6 TotalReplicatedBlocks 1 long 7