Impala is part of CDH 5. So to upgrade impala, you upgrade all of CDH. You don't upgrade CDH "first". That's the only step. Be sure to follow the Cloudera Manager documentation for upgrades, as CDH5.2 has special upgrade steps. First upgrade Cloudera Manager: http://www.cloudera.com/content/cloudera/en/documentation/core/latest/topics/cm_ag_upgrading_cm.html Then upgrade CDH: http://www.cloudera.com/content/cloudera/en/documentation/core/latest/topics/cm_mc_upgrade_to_cdh52.html ... View more