[IMPALA-7062] Fix unsafe RuntimeProfile::SortChildren() API

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.12.0
• Fix Version/s: Impala 2.13.0, Impala 3.1.0
• Component/s: Backend
• Target Version: Product Backlog
• Epic Color: ghx-label-3
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 23/May/18 17:32
• Updated: 08/Jun/18 15:50
• Resolved: 07/Jun/18 23:07

Description

As a follow-up to IMPALA-6484, we should fix the broken SortChildren() API that is not thread-safe and dangerous. We should replace it with something that sorts the children by total time using stable values that can't be modified concurrently by other threads.

Issue Links

• relates to: IMPALA-6484 Crash in impala::RuntimeProfile::SortChildren