Hadoop分布式DataNode节点启动失败

2018-06-15 23:01:55,872 INFO org.apache.hadoop.hdfs.server.common.Storage: Using 1 threads to upgrade data directories (dfs.datanode.parallel.volumes.load.threads.num=1, dataDirs=1)
2018-06-15 23:01:55,891 INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on /root/training/hadoop-2.7.3/tmp/dfs/data/in_use.lock acquired by nodename 57110@BigData14
2018-06-15 23:01:55,892 WARN org.apache.hadoop.hdfs.server.common.Storage: Failed to add storage directory [DISK]file:/root/training/hadoop-2.7.3/tmp/dfs/data/
java.io.IOException: Incompatible clusterIDs in /root/training/hadoop-2.7.3/tmp/dfs/data: namenode clusterID = CID-5e56d6ea-xxxx-xxxx-xxxx-xxxxxxxx3298; datanode clusterID = CID-30db0d7f-xxxx-xxxx-xxxx-xxxxxxxxa7fa
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:775)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.loadStorageDirectory(DataStorage.java:300)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.loadDataStorage(DataStorage.java:416)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.addStorageLocations(DataStorage.java:395)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:573)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1362)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1327)
        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:317)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:223)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:802)
        at java.lang.Thread.run(Thread.java:748)
2018-06-15 23:01:55,894 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to BigData11/192.168.163.11:9000. Exiting.
java.io.IOException: All specified directories are failed to load.
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:574)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1362)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1327)
        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:317)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:223)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:802)
        at java.lang.Thread.run(Thread.java:748)
2018-06-15 23:01:55,895 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Ending block pool service for: Block pool <registering> (Datanode Uuid unassigned) service to BigData11/192.168.163.11:9000
2018-06-15 23:01:55,996 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Removed Block pool <registering> (Datanode Uuid unassigned)
2018-06-15 23:01:57,996 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Exiting Datanode
2018-06-15 23:01:57,997 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 0

2018-06-15 23:01:57,998 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:

根据错误信息,发现是clusterID  不一致所致

解决方案:

hadoop安装目录下 hadoop-2.7.3/data/dfs/data里面的current文件夹删除即可.