Thanks for your answer. I cannot see anything on documentations that clarify if I need to delete all data. And I'm not using Cloudera Manager but Ambari (it's Hortonworks 2.6.5 hadoop 2.7.3). For what I understand deleting all data would be better to balance in node disks (I had to change a faulty disk). As I'm stuck on hadoop 2.7.3 there is no internal balance facility. ... View more

You may be hittung this bug https://issues.apache.org/jira/browse/AMBARI-22652   A workaround is to delete the line of code:   package_version = None  in all agents in file: /usr/lib/ambari-agent/lib/resource_management/libraries/script/script.py  at line 541 in ambari 2.6.2.2   then compile the script with: python -O -m compileall script.py ... View more