[IMPALA-6756] Order children of profiles in a canonical way

• Type: Improvement
• Status: Open
• Priority: Trivial
• Resolution: Unresolved
• Affects Version/s: Impala 2.12.0
• Component/s: Backend
• Labels: supportability
• Epic Link: Improve Impala Profile User Experience
• Epic Color: ghx-label-6
• Assignee: Unassigned
• Reporter: Lars Volker
• Created: 28/Mar/18 17:52
• Updated: 14/Oct/21 11:32

Description

IMPALA-6694 addressed an issue where variations in the execution order across multiple backends changed the order of a fragment instance's profile children. Instead of relying on the order in which children are created on the worker nodes and reported to the coordinator, we should introduce a canonical order, e.g. have the non-exec-node children appear before the exec-nodes, and order them alphabetically. This discussion in the review has some more details.