[SPARK-21683] "TaskKilled (another attempt succeeded)" log message should be INFO level, not WARN

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Incomplete
• Affects Version/s: 2.2.0
• Component/s: Spark Core
• Labels: bulk-closed
• Assignee: Unassigned
• Reporter: Ryan Williams
• Created: 09/Aug/17 18:14
• Updated: 21/May/19 04:11
• Resolved: 21/May/19 04:11

Description

Under other circumstances, it makes sense for TaskKilled to prompt a WARN log, but in speculative mode, when another attempt finishes first, that's not worth warning about, and should be INFO level.

This partly matters because when running with root log level WARN, and following progress using the console progress bar, these messages are a large amount and proportion of logspam that messes with the console progress display.