Old leader election can elect a dead leader over and over again
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Key: ZOOKEEPER-131
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-131
Project: Zookeeper
Issue Type: Bug
Components: leaderElection
Reporter: Benjamin Reed
I think there is a race condition that is probably easy to get into with the
old leader election and a large number of servers:
1) Leader dies
2) Followers start looking for a new leader before all Followers have abandoned
the Leader
3) The Followers looking for a new leader see votes of Followers still
following the (now dead) Leader and start voting for the dead Leader
4) The dead Leader gets reelected.
For the old leader election a server should not vote for another server that is
not nominating himself.
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