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Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to is-nn-01/192.168.248.128:8020. Exiting. org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:479)
org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to is-nn-01/192.168.248.128:8020. Exiting.
 org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:479)	at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1397)	at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1362)	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:316)	at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:227)	at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:839)	at java.lang.Thread.run(Thread.java:745)