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https://issues.apache.org/jira/browse/RATIS-983?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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runzhiwang updated RATIS-983:
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Issue Type: Improvement (was: Bug)
> Check leader before askForVotes
> -------------------------------
>
> Key: RATIS-983
> URL: https://issues.apache.org/jira/browse/RATIS-983
> Project: Ratis
> Issue Type: Improvement
> Reporter: runzhiwang
> Assignee: runzhiwang
> Priority: Major
>
> 1. There are server s0, s1, s2, all start leader election. But s2 has not
> start askForVotes.
> {code:java}
> 2020-06-21 03:46:27,958 [Thread-7] INFO impl.RoleInfo
> (RoleInfo.java:updateAndGet(143)) - s0: start LeaderElection
> 2020-06-21 03:46:27,963 [s0@group-D88B65C78887-LeaderElection1] INFO
> impl.LeaderElection (LeaderElection.java:askForVotes(206)) -
> s0@group-D88B65C78887-LeaderElection1: begin an election at term 1 for -1:
> [s0:0.0.0.0:40443, s1:0.0.0.0:46669, s2:0.0.0.0:41589], old=null
> {code}
> {code:java}
> 2020-06-21 03:46:27,990 [Thread-8] INFO impl.RoleInfo
> (RoleInfo.java:updateAndGet(143)) - s1: start LeaderElection
> 2020-06-21 03:46:27,998 [s1@group-D88B65C78887-LeaderElection2] INFO
> impl.LeaderElection (LeaderElection.java:askForVotes(206)) -
> s1@group-D88B65C78887-LeaderElection2: begin an election at term 1 for -1:
> [s0:0.0.0.0:40443, s1:0.0.0.0:46669, s2:0.0.0.0:41589], old=null
> {code}
> {code:java}
> 2020-06-21 03:46:28,064 [Thread-9] INFO impl.RoleInfo
> (RoleInfo.java:updateAndGet(143)) - s2: start LeaderElection
> {code}
> 2. s0 was elected as leader
> {code:java}
> 2020-06-21 03:46:28,093 [s0@group-D88B65C78887-LeaderElection1] INFO
> impl.LeaderElection (LeaderElection.java:logAndReturn(61)) -
> s0@group-D88B65C78887-LeaderElection1: Election PASSED; received 2
> response(s) [s0<-s1#0:FAIL-t1, s0<-s2#0:OK-t1] and 0 exception(s);
> s0@group-D88B65C78887:t1, leader=null, voted=s0,
> raftlog=s0@group-D88B65C78887-SegmentedRaftLog:OPENED:c-1,f-1,i0, conf=-1:
> [s0:0.0.0.0:40443, s1:0.0.0.0:46669, s2:0.0.0.0:41589], old=null
> 2020-06-21 03:46:28,093 [s0@group-D88B65C78887-LeaderElection1] INFO
> impl.RoleInfo (RoleInfo.java:shutdownLeaderElection(134)) - s0: shutdown
> LeaderElection
> 2020-06-21T03:46:28.0975768Z 2020-06-21 03:46:28,094
> [s0@group-D88B65C78887-LeaderElection1] INFO impl.RaftServerImpl
> (RaftServerImpl.java:setRole(174)) - s0@group-D88B65C78887: changes role from
> CANDIDATE to LEADER at term 1 for changeToLeader
> 2020-06-21 03:46:28,094 [s0@group-D88B65C78887-LeaderElection1] INFO
> impl.RaftServerImpl (ServerState.java:setLeader(255)) -
> s0@group-D88B65C78887: change Leader from null to s0 at term 1 for
> becomeLeader, leader elected after 474ms
> {code}
> 3. s2 start askForVotes which did start in step1. Then a new leader election
> happens.
> {code:java}
> 2020-06-21 03:46:28,096 [s2@group-D88B65C78887-LeaderElection3] INFO
> impl.LeaderElection (LeaderElection.java:askForVotes(206)) -
> s2@group-D88B65C78887-LeaderElection3: begin an election at term 2 for -1:
> [s0:0.0.0.0:40443, s1:0.0.0.0:46669, s2:0.0.0.0:41589], old=null
> {code}
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