關閉namenode的Hadoop集羣

Question

我試圖建立一個Hadoop集羣，並得到此以下錯誤： -

$HADOOP_PREFIX/bin/hdfs namenode -format 

Re-format filesystem in Storage Directory /var/hadoop/hadoop-namenode ? (Y or N) Y 
17/09/11 19:41:55 INFO namenode.FSImage: Allocated new BlockPoolId: BP-448039548-10.211.55.101-1505158915421 
17/09/11 19:41:55 INFO common.Storage: Storage directory /var/hadoop/hadoop-namenode has been successfully formatted. 
17/09/11 19:41:55 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >= 0 
17/09/11 19:41:55 INFO util.ExitUtil: Exiting with status 0 
17/09/11 19:41:55 INFO namenode.NameNode: SHUTDOWN_MSG: 
/************************************************************ 
SHUTDOWN_MSG: Shutting down NameNode at node1/10.211.55.101 

我試着按照本教程來設置集羣。

https://github.com/vangj/vagrant-hadoop-2.4.1-spark-1.0.1

Answer 1

這是不是一個錯誤。在啓動HDFS之前，您需要格式化namenode。這與運行Linux/Windows之前需要格式化磁盤相似。