A sample text widget

Etiam pulvinar consectetur dolor sed malesuada. Ut convallis euismod dolor nec pretium. Nunc ut tristique massa.

Nam sodales mi vitae dolor ullamcorper et vulputate enim accumsan. Morbi orci magna, tincidunt vitae molestie nec, molestie at mi. Nulla nulla lorem, suscipit in posuere in, interdum non magna.

WARN appmaster.SliderAppMaster – python: error while loading shared libraries: libpython2.7.so.1.0: cannot open shared object file: No such file or directory” when starting LLAP while loading shared libraries

Cause

This field indicates the primary cause of the issue solved in this KB article. This issue occurs because, the Hive user launching the Slider application picks up environment variables from Ambari-agent for newer version of Python configured, while the Slider application looks for the new Python libraries in the location of the older […]

How to kill a Hive query that does not have a YARN application_ID?

ometimes, when running CREATE and SELECT queries, YARN application ID is not created. These queries may have to be killed manually. To achieve this, do the following:

Take the query ID from the Beeline / Hive CLI console: hive> select * from firsttable; Query ID = mapr_20170523134547_2c04d119-5495-401e-b7b7-2ad87f0f5627 Total jobs = 1 Launching Job 1 […]

Migrate/Transfer/Copy AWS Data from volumes or S3 to Hadoop

Hadoop distcp s3n://bucketname/directoryname/test.csv /user/myuser/mydirectory/

 

Detail information can be found at following link.

https://hortonworks.github.io/hdp-aws/s3-copy-data/index.html

Placing Namenode in safemode and Perform checkpoint

Normally in real environment secondary node performs checkpoint operation and keep syncing with active namenode to keep latest FSimage. In HA environment active namenode writes edit log into journal node and standby node go and get the edit log and create new FSimage.

[hdfs@datanode1 ~]$ hdfs dfsadmin -safemode get Safe mode is OFF

[hdfs@datanode1 ~]$ […]