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This article mainly introduces what problems will be encountered when debugging hadoop examples. It is very detailed and has a certain reference value. Friends who are interested must finish reading it!

After installing the plug-in for hadoop in eclipse, you cannot connect to dfs

Modify the localhost configured in etc/hadoop/core-site.xml to ip address

After connecting to dfs, the file cannot be uploaded or deleted

[root@localhost hadoop-2.6.3] # vi etc/hadoop/mapred-site.xml.template [root@localhost hadoop-2.6.3] # cp etc/hadoop/mapred-site.xml.template etc/hadoop/mapred-site.xml

Add the following configuration

Dfs.permissions false

When running remotely under windows 7, you need the winutils.exe corresponding to the version

Download address corresponding to hadoop2.6: http://down.51cto.com/data/1983230

Add the following variable settings to the code

System.setProperty ("hadoop.home.dir", "D:\ open_source\\ zip\\ hadoop\\ hadoop-2.6.3"); System.setProperty ("HADOOP_HOME", "D:\ open_source\\ zip\\ hadoop\\ hadoop-2.6.3")

Or add PATH,HADDOOP_HOME in the eclisep-> run-> Run Configurations-> Environment tab

HADOOP_HOME D:\ open_source\ zip\ hadoop\ hadoop-2.6.3

PATH% PATH%;D:\ open_source\ zip\ hadoop\ hadoop-2.6.3\ bin

The above is all the contents of the article "what problems you will encounter when debugging hadoop samples". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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