could only be replicated to 0 nodes instead of minReplication (=1). There are 1 datanode(s) running and no node(s) are excluded in this operation.

hdfs dfsadmin -report

hadoop fsck -locations

 查看DataNode日志（vim  /usr/local/hadoop/logs/）

2021-04-01 10:15:31,969 WARN org.apache.hadoop.hdfs.server.common.Storage: Failed to add storage directory [DISK]file:/usr/local/hadoop/tmp/dfs/data/
org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /usr/local/hadoop/tmp/dfs/data is in an inconsistent state: Can't format the storage directory because the current directory is not empty.
        at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.checkEmptyCurrent(Storage.java:498)
        at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.analyzeStorage(Storage.java:603)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.loadStorageDirectory(DataStorage.java:270)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.loadDataStorage(DataStorage.java:409)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.addStorageLocations(DataStorage.java:388)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:564)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1659)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1620)
        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:388)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:282)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:821)
        at java.lang.Thread.run(Thread.java:748)
2021-04-01 10:15:31,971 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to Master/211.69.243.34:9000. Exiting.
java.io.IOException: All specified directories have failed to load.
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:565)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1659)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1620)
        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:388)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:282)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:821)
        at java.lang.Thread.run(Thread.java:748)
2021-04-01 10:15:31,971 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Ending block pool service for: Block pool <registering> (Datanode Uuid unassigned) service to Master/211.69.243.34:9000
2021-04-01 10:15:31,982 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Removed Block pool <registering> (Datanode Uuid unassigned)
2021-04-01 10:15:33,982 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Exiting Datanode
2021-04-01 10:15:33,988 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down DataNode at Master/211.69.243.34
************************************************************/