[IMPALA-8936] Make queuing reason for unhealthy executor groups more generic

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 3.4.0
• Component/s: Backend
• Labels: user-experience
• Epic Color: ghx-label-1
• Assignee: Lars Volker
• Reporter: Lars Volker
• Created: 11/Sep/19 03:13
• Updated: 16/Sep/19 00:36
• Resolved: 16/Sep/19 00:36

Description

In some situations, users might actually expect not having a healthy executor group around, e.g. when they're starting one and it takes a while to come online. We should make the queuing reason more generic and drop the "unhealthy" concept from it to reduce confusion.