[SPARK-16775] Remove deprecated accumulator v1 APIs

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: PySpark, Spark Core, SQL
• Labels: release-notes
• Target Version/s: 3.0.0
• Docs Text: The deprecated v1 Accumulator API (org.apache.spark.Accumulator and related classes) has been removed in Spark 3.0. Users should use the v2 API.
• Assignee: Sean R. Owen
• Reporter: Holden Karau
• Created: 28/Jul/16 18:04
• Updated: 25/Oct/18 15:40
• Resolved: 24/Oct/18 14:08

Description

Deprecating the old accumulator API added a large number of warnings - many of these could be fixed with a bit of refactoring to offer a non-deprecated internal class while still preserving the external deprecation warnings.

... but we can also just remove the old deprecated API entirely in Spark 3.0.0.

Issue Links

• contains: SPARK-16861 Refactor PySpark accumulator API to be on top of AccumulatorV2 API
• links to: [Github] Pull Request #22730 (srowen)