[FLINK-1290] Optimizer prunes all candidates when unable to reuse sort properties

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.8.0
• Fix Version/s: 0.8.0
• Component/s: API / DataSet
• Assignee: Stephan Ewen
• Reporter: Stephan Ewen
• Created: 27/Nov/14 12:21
• Updated: 28/Feb/19 14:30
• Resolved: 27/Nov/14 17:59

Description

Programs fail with an exception that no plan could be created.
The bug can be reproduced by the following code:

val data : DataSet[(Long, Long)] = ...

data.distinct(0, 1).groupBy(0).reduceGroup(...)