Datanode 未正确启动 [英] Datanode not starts correctly

问题描述

我正在尝试以伪分布式模式安装 Hadoop 2.2.0.当我尝试启动 datanode 服务时，它显示以下错误，谁能告诉我如何解决这个问题?

I am trying to install Hadoop 2.2.0 in pseudo-distributed mode. While I am trying to start the datanode services it is showing the following error, can anyone please tell how to resolve this?

**2**014-03-11 08:48:15,916 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Block pool <registering> (storage id unknown) service to localhost/127.0.0.1:9000 starting to offer service
2014-03-11 08:48:15,922 INFO org.apache.hadoop.ipc.Server: IPC Server Responder: starting
2014-03-11 08:48:15,922 INFO org.apache.hadoop.ipc.Server: IPC Server listener on 50020: starting
2014-03-11 08:48:16,406 INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on /home/prassanna/usr/local/hadoop/yarn_data/hdfs/datanode/in_use.lock acquired by nodename 3627@prassanna-Studio-1558
2014-03-11 08:48:16,426 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for block pool Block pool BP-611836968-127.0.1.1-1394507838610 (storage id DS-1960076343-127.0.1.1-50010-1394127604582) service to localhost/127.0.0.1:9000
java.io.IOException: Incompatible clusterIDs in /home/prassanna/usr/local/hadoop/yarn_data/hdfs/datanode: namenode clusterID = CID-fb61aa70-4b15-470e-a1d0-12653e357a10; datanode clusterID = CID-8bf63244-0510-4db6-a949-8f74b50f2be9
    at**** org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:391)
    at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:191)
    at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:219)
    at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:837)
    at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:808)
    at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:280)
    at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:222)
    at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:664)
    at java.lang.Thread.run(Thread.java:662)
2014-03-11 08:48:16,427 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Ending block pool service for: Block pool BP-611836968-127.0.1.1-1394507838610 (storage id DS-1960076343-127.0.1.1-50010-1394127604582) service to localhost/127.0.0.1:9000
2014-03-11 08:48:16,532 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Removed Block pool BP-611836968-127.0.1.1-1394507838610 (storage id DS-1960076343-127.0.1.1-50010-1394127604582)
2014-03-11 08:48:18,532 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Exiting Datanode
2014-03-11 08:48:18,534 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 0
2014-03-11 08:48:18,536 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: 

推荐答案

可以按照下面的方法，

复制到剪贴板数据节点 clusterID 作为示例，CID-8bf63244-0510-4db6-a949-8f74b50f2be9

copy to clipboard datanode clusterID for your example, CID-8bf63244-0510-4db6-a949-8f74b50f2be9

并在 HADOOP_HOME/bin 目录下运行以下命令

and run following command under HADOOP_HOME/bin directory

./hdfs namenode -format -clusterId CID-8bf63244-0510-4db6-a949-8f74b50f2be9

然后这段代码用 datanode 集群 ID 格式化了 namenode.

then this code formatted the namenode with datanode cluster ids.

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