[SOLR-11085] Improve resiliency of autoscaling actions

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.1, 8.0
• Component/s: AutoScaling, SolrCloud
• Security Level: Public (Default Security Level. Issues are Public)
• Assignee: Shalin Shekhar Mangar
• Reporter: Shalin Shekhar Mangar
• Created: 14/Jul/17 12:48
• Updated: 17/Oct/17 11:04
• Resolved: 09/Oct/17 16:53

Description

We need to improve resiliency of actions against:

1. Overseer restarts
2. Failed operations e.g. a move replica fails if target node is no longer live