[SOLR-5991] SolrCloud: Add API to move leader off a Solr instance

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 4.7.1
• Component/s: SolrCloud
• Assignee: Unassigned
• Reporter: Rich Mayfield
• Created: 16/Apr/14 22:05
• Updated: 13/May/24 23:01
• Resolved: 13/May/24 23:01

Description

Common maintenance chores require restarting Solr instances.

The process of a shutdown becomes a whole lot more reliable if we can proactively move any leadership roles off of the Solr instance we are going to shut down. The leadership election process then runs immediately.

I am not sure what the semantics should be (either accomplishes the goal but one of these might be best):

• A call to tell a core to give up leadership (thus the next replica is chosen)
• A call to specify which core should become the leader

Issue Links

• is part of: SOLR-6491 Umbrella JIRA for managing the leader assignments
• is related to: SOLR-7569 Create an API to force a leader election between nodes
• is superceded by: SOLR-9320 A REPLACENODE command to decommission an existing node with another new node
• is superceded by: SOLR-6491 Umbrella JIRA for managing the leader assignments