hadoop ssh name or service not known

Mapreduce job stuck at map 0% reduce 0%

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 […]

What Experts say ?

Wow… that took a lot of reading to go over all those great posts; but I learned a great deal :)
thanks for taking the time to put together such a super articles :)