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Explorer
Posts: 22
Registered: ‎02-01-2017

Re: Not able to access HDFS, getting Connection exception.

Hi thanks for the docs. I actually needed to boot it from the cloudera manager. I could not do it from the commandline must have something to do with my setup.
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Expert Contributor
Posts: 176
Registered: ‎05-16-2016

Re: Not able to access HDFS, getting Connection exception.

[ Edited ]
WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: 0.0.0.0/0.0.0.0:8022

From the above error it is clear that the external datanode is having trouble connecting to Namenode.

You can do one thing. 

 

Check the status of the namenode you are connect by

Sudo Service hadoop-hdfs-namenode status
Sudo Service hadoop-hdfs-secondarynamenode status

if it has not started then you may start it by replacing the status with start if you dont have authorization you should contact the hadoop admin . Also please check the same for Secondarynamenode. 

 

Thanks

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