[KUDU-528] Leader should proactively propagate commitIndex to followers

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: M4.5
• Component/s: consensus
• Target Version/s: Public beta
• Code Review: http://gerrit.sjc.cloudera.com:8080/8275
• Assignee: David Alves
• Reporter: Todd Lipcon
• Created: 02/Oct/14 14:54
• Updated: 26/Feb/16 11:49
• Resolved: 20/Sep/15 18:54

Description

Currently we only signal a request to peers if we have new replicate messages to send. This means that we don't aggressively push the commit index forward unless we are actively replicating new messages. We should probably do a SignalRequest() with the 'force' flag true when the commit index on the leader moves ahead.