@Tak567 There are some free courses available on same page which you can access for example: https://www.cloudera.com/about/training/courses/introduction-to-cloudera-manager.html   So you have to register and then you can avail this training similar for some other free courses as well. You can check below some free courses: https://www.cloudera.com/about/training.html#?fq=training%3Acomplimentary%2Ffree   There are also some videos on Youtube from Cloudera and Cloudera Blog is also something you can take a look.  At last the Cloudera Community is open to answers the question and you can find some articles here as well.    You can also purchase some courses, the same page will give you that details as well.  ... View more

@vijaypabothu You can resolve this using below steps. This seems somehow the directory is not exists which is causing the issue.  # hdfs dfs -mkdir -p /user/spark/applicationHistory // make sure it is owned by spark user/group # hdfs dfs -chown -R spark:spark /user/spark/ // set 777 access rights and sticky bit # hdfs dfs -chmod 1777 /user/spark/applicationHistory // restart the SHS process to test. CM > Spark > Instances > (select Spark History Server) > Actions > Restart   ... View more

@vijaypabothu Supervisor returned FATAL means the process is in hung state or something which is causing not come up the DN/NN.  I would suggest you to try hards stopping/starting agent or if you are okay then reboot the node itself. This should resolve the issue.  ... View more

@wert_1311 Cloudera Software will not adjust /etc/hosts entries. You have to manually fix that entries and all you need is to fulfil the network Requirements in below doc:  https://docs.cloudera.com/documentation/enterprise/latest/topics/configure_network_names.html   Also you can refer this doc for changing IPs/Hostname. https://docs.cloudera.com/documentation/enterprise/5-13-x/topics/cm_ag_change_hostnames.html ... View more

@Amn_468  This doc will give you good start on how you can change IPs and hostname. https://docs.cloudera.com/documentation/enterprise/5-13-x/topics/cm_ag_change_hostnames.html ... View more