[KAFKA-10634] LeaderChangeMessage should include the leader as one of the voters

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Assignee: Sagar Rao
• Reporter: Jose Armando Garcia Sancio
• Created: 22/Oct/20 19:59
• Updated: 09/Dec/20 01:38
• Resolved: 09/Dec/20 01:38

Description

When a leader is elect the leader writes a `LeaderChangeMessage` to the replicated log. This message is defined in KIP-595 as:

{
  "type": "data",
  "name": "LeaderChangeMessage",
  "validVersions": "0",
  "flexibleVersions": "0+",
  "fields": [
      {"name": "LeaderId", "type": "int32", "versions": "0+",
       "about": "The ID of the newly elected leader"},
      {"name": "VotedIds", "type": "[]int32", "versions": "0+",
       "about": "The IDs of the voters who voted for the current leader"},
   ]
}

The current implementation doesn't include the LeaderId in the set of VoterIds. In the protocol it is guarantee that the leader must have voted for itself.

Issue Links

• links to: GitHub Pull Request #9539