Problem with hadoop start-dfs.sh


Mapreduce job stuck at map 0% reduce 0% 1

Error Scenario: Mapreduce job stuck at map 0% reduce 0%. : Could not resolve hostname

Mapreduce jobs are not running. And the below error message is coming when starting HDFS daemons.

Resolution: These above error messages are received when there is some issue with ssh communication. So, in these situations, we need to remove openssh-client and openssh-server and re-install them again.

Once the ssh is re-installed, we will […]


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Dharmeswaran ETL / Hadoop Developer Spark Nov 2016 September 21, 2017

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