[IMPALA-5852] Improve MINIMUM_RESERVATION_UNAVAILABLE message

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.10.0
• Fix Version/s: Impala 2.10.0
• Component/s: Backend
• Labels: usability
• Target Version: Impala 2.11.0
• Epic Color: ghx-label-6
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 28/Aug/17 22:02
• Updated: 31/Aug/17 21:50
• Resolved: 29/Aug/17 15:43

Description

Now that queries with too-low mem_limits are rejected in admission control, we can refine this error message.

Assuming that admission control is enabled (which is the default and only recommended configuration), the only reason that query startup should fail is if memory is oversubscribed on the Impala daemon.