2018-01-09 09:47:38,297 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to controller/192.168.1.183:9000. Exiting.
java.io.IOException: Incompatible clusterIDs in /usr/hadoop/hdfs/data: namenode clusterID = CID-732f0394-d671-4cf9-a482-6b96d1f3ffcb; datanode clusterID = CID-9a5c576a-5911-4358-b7b4-9d855841d0a0
at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:646)
at org.apache.hadoop.hdfs.server.datanode.DataStorage.addStorageLocations(DataStorage.java:320)
at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:403)
at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:422)
at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1311)
at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1276)
at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:314)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:220)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:828)
at java.lang.Thread.run(Thread.java:748)
2018-01-09 09:47:38,298 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Ending block pool service for: Block pool <registering> (Datanode Uuid unassigned) service to controller/192.168.1.183:9000
2018-01-09 09:47:38,399 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Removed Block pool <registering> (Datanode Uuid unassigned)
2018-01-09 09:47:40,399 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Exiting Datanode
2018-01-09 09:47:40,400 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 0
2018-01-09 09:47:40,401 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down DataNode at hett-OptiPlex-7040/127.0.1.1
************************************************************/
发现datanode没有起来，所以查看了一下日志，从而发现配置文件没有中的文件没有配置完整
<name>dfs.name.dir</name>
<value>/usr/local/src/hadoop/hdfs/name</value>
<description>namenode上存储hdfs名字空间元数据 </description>
</property>
<property>
<name>dfs.data.dir</name>
<value>/usr/local/src/hadoop/hdfs/data</value>
<description>datanode上数据块的物理存储位置</description>
</property>
<property>
<name>dfs.replication</name>
<value>1</value>
<description>副本个数，配置默认是3,应小于datanode机器数量</description>
</property>