hadoop 启动报错 Incompatible clusterIDs in /tmp/hadoop-root/dfs/data: namenode
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调用 start-dfs.sh 时候 报错如下,导致datanode无法启动:
ava.io.IOException: Incompatible clusterIDs in /tmp/hadoop-root/dfs/data: namenode clusterID = CID-3e3e295a-0dff-4d4c-ac57-ea965289a4ee; datanode clusterID = CID-092549d0-a8ff-4ad6-b93b-13079d654109at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:477)at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:226)at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:254)at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:975)at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:946)at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:278)at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:220)at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:812)at java.lang.Thread.run(Thread.java:745)解决办法:
You need to do something like this:
bin/stop-all.sh
rm -Rf /tmp/hadoop-your-username/* (所有datanode节点都要执行)
bin/hadoop namenode -format
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