CODEWITHSUNDEEP
hadoopdistributed
LMHadoop
LMHadoop

Reputation: 57

formatting namenode, node is lost

I'am trying to set up the pseudo distributed mode for Hadoop. all first steps are ok, but when I format the namenode and browse the filesystem (50070), it shows "there are no datanode in the cluster"

http://hadoop.apache.org/docs/stable/single_node_setup.html

should I do other configuration? change directory path?

thanks

Upvotes: 0

Views: 1070

Answers (1)

Chris White
Chris White

Reputation: 30089

From your comments it looks like you've formatted your name node twice, but not deleted the underlying data for the data node.

I suggest you clean up as follows:

  • Ensure that all hadoop services are stopped (bin/stop-all.sh)
  • Remove all data in the directories named in conf/hdfs-site.xml conf file
    • dfs.name.dir
    • dfs.data.dir
  • Reformat the name node again
  • Start HDFS only (bin/start-dfs.sh)
  • Check the logs for both the name node and data node to ensure that everything started without error

If you're still having problems, post your name node and data node logs back into your original question

Upvotes: 1

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