Could you check your hdfs-site.xml for the below  parameter   dfs.namenode.resource.du.reserved looks like you have allocated only 100MB - i can see that in you error log. Increase it accordingly  and restart the namenode . it should fix the problem ... View more

That is strange .  I hope you are using  username: cloudera could you check on the home /Desktop directory of the user.    Could you please take a look into this quickly to make sure your setup is good. https://community.cloudera.com/t5/Hadoop-101-Training-Quickstart/How-to-setup-Cloudera-Quickstart-Virtual-Machine/ta-p/35056 ... View more

SInce you have mentioned that you are using CDH4.3.0  - it ships with  hive-0.10.0+121 please refer the link VARCHAR can be used with CDH 5.2 and higher (i,e Hive 0.12.0)   ... View more

if you have Cloudera manager , you could easily find the problem as to which job is creating lot of stress on the storage . Please take a peek in to the below link    https://www.cloudera.com/documentation/enterprise/latest/topics/cm_dg_disk_usage_reports.html   https://www.cloudera.com/documentation/enterprise/latest/topics/admin_directory_usage.html#concept_lz3_f5s_gv ... View more

CDH 5.5 password redaction is enabled by default .  Please check below link for more information.    https://blog.cloudera.com/blog/2015/06/new-in-cdh-5-4-sensitive-data-redaction/   https://www.cloudera.com/documentation/enterprise/5-4-x/topics/sg_redaction.html#concept_nnn_m13_fr   ... View more

I would say just Adding nodes would not result good performance all the time  , as you said there are some parameters thats needs to be take care . I would consider doing few things like Optimized joins , making the large table in the query as last when performing join or use hint like Streamtable . Enabling the Local mode , mainly tuning the number of mappers and reducers , JMV reuse and finally using the good old Index  ,sometimes help speed up the group by query in hive .   I also agree with @saranvisa and @mbigelow on their thoughts .  ... View more

great. Just curious to know if it reflecting the same in Resource manager Web Ui  ... View more

sounds good .    ... View more

could you use --verbose in your import and paste the logs.    ... View more

Stack trace tells us that there is a connection establishment issue  Impala accept connection via this port  21050 . Could you please make sure if this open and make sure you are using 21050 port in your code.   https://www.cloudera.com/documentation/enterprise/5-9-x/topics/impala_ports.html#ports     Are you using shared hive metastore  for impala . If so  please check the status of the below following on the host you are trying to connect  .      sudo service hive-metastore status sudo service hive-server2 status sudo service impala-state-store status sudo service impala-catalog status   ... View more