[SPARK-24297] Change default value for spark.maxRemoteBlockSizeFetchToMem to be < 2GB

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 2.4.0
• Component/s: Block Manager, Shuffle, Spark Core
• Assignee: Imran Rashid
• Reporter: Imran Rashid
• Created: 16/May/18 18:29
• Updated: 25/Jul/18 01:09
• Resolved: 25/Jul/18 01:09

Description

Any network request which does not use stream-to-disk that is sending over 2GB is doomed to fail, so we might as well at least set the default value of spark.maxRemoteBlockSizeFetchToMem to something < 2GB.

It probably makes sense to set it to something even lower still, but that might require more careful testing; this is a totally safe first step.

Issue Links

• links to: [Github] Pull Request #21474 (squito)