When the heartbeat stream to the leader failed, currentMaster kept the
lost master until a new stream answered, so lookups on a cache miss
kept dialing it through the retry delay even with a new leader already
elected.
On a regular heartbeat error, ask the configured masters for the raft
leader and publish it, within the retry delay rather than on top of it.
Without an answer the last known leader stays: clearing it would only
trade a dead address for an empty one.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Lisandro PinandClaude Opus 5.5
a5925906c8