Cloudera Docs

Behavioral Changes in Spark

Behavioral changes denote a marked change in behavior from the previously released version to this version of Spark.

Cloudera Runtime 7.3.2

Cloudera Runtime 7.3.2 introduces functional adjustments, behavioral updates for Spark, and includes all service packs and cumulative hotfixes from 7.3.1.100 through 7.3.1.706. For a comprehensive record of all functional adjustments in Cloudera Runtime 7.3.1.x, see Spark Behavioral Changes.

Summary: Enhanced the security of Spark by implementing new default configuration settings
Previous behavior:
  1. spark.ui.enabled=true: possible initiation of an HTTP service that can be accessed from external hosts.
  2. spark.io.encryption.keySizeBits=128: the default Spark keySizeBits
New behavior:
  1. spark.ui.enabled=false: preventing initiation of an HTTP service that can be accessed from external hosts.
  2. spark.io.encryption.keySizeBits=256: the default Spark keySizeBits has been increased from 128 to 256