Spark

Know more about the Spark roll back.

• The Spark application history lives in HDFS, and with the rollback of HDFS, the history at the time of the backup is restored. Any Spark applications run after the backup and rollback will not be visible.
• After the rollback, versions of Spark applications built against HDP 2 should be used instead of versions that are rebuilt against CDP.
• Start Spark in Ambari UI.