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Merge pull request #1850 from yichengq/247

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raft: return 0 for term of compacted index
This commit is contained in:
Yicheng Qin
2014-12-03 17:23:32 -08:00
parent 2c0d323318 34a468de36
commit e344774c10
2 changed files with 35 additions and 3 deletions
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4
raft/log.go
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@@ -199,7 +199,9 @@ func (l *raftLog) stableSnapTo(i uint64) { l.unstable.stableSnapTo(i) }
func (l *raftLog) lastTerm() uint64 { return l.term(l.lastIndex()) }
func (l *raftLog) term(i uint64) uint64 {
if i > l.lastIndex() {
// the valid term range is [index of dummy entry, last index]
dummyIndex := l.firstIndex() - 1
if i < dummyIndex || i > l.lastIndex() {
return 0
}

34
raft/log_test.go
View File

@@ -634,7 +634,7 @@ func TestTerm(t *testing.T) {
num := uint64(100)
storage := NewMemoryStorage()
storage.ApplySnapshot(pb.Snapshot{Metadata: pb.SnapshotMetadata{Index: offset}})
storage.ApplySnapshot(pb.Snapshot{Metadata: pb.SnapshotMetadata{Index: offset, Term: 1}})
l := newLog(storage)
for i = 1; i < num; i++ {
l.append(pb.Entry{Index: offset + i, Term: i})
@@ -645,7 +645,7 @@ func TestTerm(t *testing.T) {
w uint64
}{
{offset - 1, 0},
{offset, 0},
{offset, 1},
{offset + num/2, num / 2},
{offset + num - 1, num - 1},
{offset + num, 0},
@@ -659,6 +659,36 @@ func TestTerm(t *testing.T) {
}
}
func TestTermWithUnstableSnapshot(t *testing.T) {
storagesnapi := uint64(100)
unstablesnapi := storagesnapi + 5
storage := NewMemoryStorage()
storage.ApplySnapshot(pb.Snapshot{Metadata: pb.SnapshotMetadata{Index: storagesnapi, Term: 1}})
l := newLog(storage)
l.restore(pb.Snapshot{Metadata: pb.SnapshotMetadata{Index: unstablesnapi, Term: 1}})
tests := []struct {
index uint64
w uint64
}{
// cannot get term from storage
{storagesnapi, 0},
// cannot get term from the gap between storage ents and unstable snapshot
{storagesnapi + 1, 0},
{unstablesnapi - 1, 0},
// get term from unstable snapshot index
{unstablesnapi, 1},
}
for i, tt := range tests {
term := l.term(tt.index)
if !reflect.DeepEqual(term, tt.w) {
t.Errorf("#%d: at = %d, want %d", i, term, tt.w)
}
}
}
func TestSlice(t *testing.T) {
var i uint64
offset := uint64(100)