hadoop 集群 master datanode 没有启动

2018-02-07 02:47:50,377 WARN org.apache.hadoop.hdfs.server.common.Storage: java.io.IOException: Incompatible clusterIDs in /opt/app/hadoop-2.5.0/data/temp/dfs/data: namenode clusterID = CID-e36bedae-9a49-49cc-99bb-fc0bab2397c6; datanode clusterID = CID-39879bff-87ca-4127-ba35-d3ba57188748
2018-02-07 02:47:50,378 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to master/192.168.80.130:8020. Exiting. 
java.io.IOException: All specified directories are failed to load.
    at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:477)
    at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1322)
    at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1292)
    at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:321)
    at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:225)
    at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:862)
    at java.lang.Thread.run(Thread.java:748)
2018-02-07 02:47:50,387 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Ending block pool service for: Block pool <registering> (Datanode Uuid unassigned) service to master/192.168.80.130:8020
2018-02-07 02:47:50,391 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Removed Block pool <registering> (Datanode Uuid unassigned)
2018-02-07 02:47:52,392 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Exiting Datanode
2018-02-07 02:47:52,394 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 0
2018-02-07 02:47:52,399 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: 

• 启动hadoop 集群时候发现master datanode 没有启动 查看日志发现是datanode 和namenode 的集群ID 不一样
• 然后将namenode的集群ID 复制到 dadanode 集群
• cd /data/temp/data/ 
• vim VERSION

• storageID=DS-26514c3d-3305-4468-b555-8e3a0c3e8316
  clusterID=CID-39879bff-87ca-4127-ba35-d3ba57188748-->修改这个
  cTime=0
  datanodeUuid=61ad9229-5274-44eb-8585-37f2ce4933c9
  storageType=DATA_NODE
  layoutVersion=-56