问题解决There are 0 datanode(s) running and no node(s) are excludedin this operation
出现问题:**
File/usr/root/input/file01.COPYING could only be replicated to 0 nodes instead ofminRepLication (=1) There are 0 datanode(s) running and no node(s) are excludedin this operation
**
分析:
我们在第一次执行#hadoop namenode –format 完然后在执行#sbin/start-all.sh
在执行#jps,能看到Datanode,在执行#hadoop namenode –format然后执行#jps这时看不到Datanode ,如图所示:
然后我们想把文本放到输入目录执行bin/hdfs dfs -put/usr/local/hadoop/hadoop-2.6.0/test/* /user/root/input 把/test/*文件上传到hdfs的/user/root/input中,出现这样的问题,
解决办法:
是我们执行太多次了hadoop namenode –format,创建了多个,因此在我们对应的hdfs目录删除hdfs-site.xml配置的保存datanode和namenode目录即可。
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