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raft: address issues with election timeout

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This commit is contained in:
Xiang Li 2014-10-08 07:41:17 +08:00
parent f65d117462
commit 1cd3345e00
2 changed files with 6 additions and 7 deletions
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7
raft/raft.go
View File

@ -5,7 +5,6 @@ import (
"fmt"
"math/rand"
"sort"
"time"
pb "github.com/coreos/etcd/raft/raftpb"
)
@ -134,7 +133,7 @@ func newRaft(id int64, peers []int64, election, heartbeat int) *raft {
if id == None {
panic("cannot use none id")
}
rand.Seed(time.Now().UnixNano())
rand.Seed(id)
r := &raft{
id: id,
lead: None,
@ -589,12 +588,12 @@ func (r *raft) loadState(state pb.HardState) {
}
// isElectionTimeout returns true if r.elapsed is greater than the
// randomized election timeout in [electiontimeout, 2 * electiontimeout - 1).
// randomized election timeout in (electiontimeout, 2 * electiontimeout - 1).
// Otherwise, it returns false.
func (r *raft) isElectionTimeout() bool {
d := r.elapsed - r.electionTimeout
if d < 0 {
return false
}
return d > int(rand.Int31())%r.electionTimeout
return d > rand.Int()%r.electionTimeout
}

6
raft/raft_test.go
View File

@ -496,7 +496,7 @@ func TestCommit(t *testing.T) {
func TestIsElectionTimeout(t *testing.T) {
tests := []struct {
elapse int
wpossibility float64
wprobability float64
round bool
}{
{5, 0, false},
@ -519,8 +519,8 @@ func TestIsElectionTimeout(t *testing.T) {
if tt.round {
got = math.Floor(got*10+0.5) / 10.0
}
if got != tt.wpossibility {
t.Errorf("#%d: possibility = %v, want %v", i, got, tt.wpossibility)
if got != tt.wprobability {
t.Errorf("#%d: possibility = %v, want %v", i, got, tt.wprobability)
}
}
}