hadoop单机启动时datanode没有启动

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1.具体错误描述

2018-11-27 23:45:34,356 WARN org.apache.hadoop.hdfs.server.common.Storage: Failed to add storage directory [DISK]file:/usr/local/temp/hadoop/datanode/
java.io.IOException: Incompatible clusterIDs in /usr/local/temp/hadoop/datanode: namenode clusterID = CID-f52422a5-0ee9-46a2-bb8b-e7cc19771af5; datanode clusterID = CID-52f393e6-2bd3-4b93-9f42-da52c1581305
	at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:760)
	at org.apache.hadoop.hdfs.server.datanode.DataStorage.loadStorageDirectory(DataStorage.java:293)
	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:556)
	at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1649)
	at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1610)
	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:374)
	at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:280)
	at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:816)
	at java.lang.Thread.run(Thread.java:745)
2018-11-27 23:45:34,360 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool <registering> (Datanode Uuid 559dc6f6-6c85-41b9-afc0-07c5672a64da) service to localhost/10.203.128.10:9000. Exiting. 

然后去网上查资料的时候解释了解到，在hadoop启动hdf服务的时候，会分别启动namenode和datanode两个节点，在hdfs-site.xml文件中设置的namenode和datanode里面会有对应的路径，我的路径分别是

<configuration>
<property>  
        <name>dfs.name.dir</name>  
        <value>/usr/local/temp/hadoop/namenode</value>  
    </property>  
    <property>  
        <name>dfs.data.dir</name>  
        <value>/usr/local/temp/hadoop/datanode</value>  
    </property>  
    <property>  
        <name>dfs.replication</name>  
        <value>1</value>  
    </property>  

</configuration>

然后去对应的目录
下面时datanode的VERSION

root@ubuntu:/usr/local/temp/hadoop/datanode/current# cat VERSION 
#Wed Nov 28 00:13:54 PST 2018
storageID=DS-7c51b817-fffc-4cdf-8baa-ac119fec47af
clusterID=CID-f52422a5-0ee9-46a2-bb8b-e7cc19771af5
cTime=0
datanodeUuid=559dc6f6-6c85-41b9-afc0-07c5672a64da
storageType=DATA_NODE
layoutVersion=-57
root@ubuntu:/usr/local/temp/hadoop/datanode/current# 

namenode 的VERSION

root@ubuntu:/usr/local/temp/hadoop/namenode/current# cat VERSION 
#Tue Nov 27 23:06:20 PST 2018
namespaceID=203824828
clusterID=CID-f52422a5-0ee9-46a2-bb8b-e7cc19771af4
cTime=1543388780695
storageType=NAME_NODE
blockpoolID=BP-1502030832-127.0.0.1-1543388780695
layoutVersion=-63

然后把两个clusterID改成一样的话，重启启动就欧克了