[SPARK-34899] Use origin plan if can not coalesce shuffle partition

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.2.0
• Fix Version/s: 3.2.0
• Component/s: SQL
• Assignee: XiDuo You
• Reporter: XiDuo You
• Created: 29/Mar/21 10:25
• Updated: 06/May/21 01:34
• Resolved: 30/Mar/21 13:50

Description

The `CoalesceShufflePartitions` can not coalesce such case if the total shuffle partitions size of mappers are big enough. Then it's confused to use `CustomShuffleReaderExec` which marked as `coalesced` but has no affect with partition number.

Issue Links

• links to: [Github] Pull Request #31994 (ulysses-you)