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id: fix the bug that id may be duplicated #3322

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merged 3 commits into from
Jan 4, 2021
Merged

id: fix the bug that id may be duplicated #3322

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ba1055b
id: fix the bug that id may be duplicated
HunDunDM Jan 4, 2021
ba5257e
add test
HunDunDM Jan 4, 2021
4d6d298
fix test
HunDunDM Jan 4, 2021
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3 changes: 1 addition & 2 deletions server/id/id.go
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Original file line number Diff line number Diff line change
Expand Up @@ -58,8 +58,6 @@ func (alloc *AllocatorImpl) Alloc() (uint64, error) {
if err := alloc.generateLocked(); err != nil {
return 0, err
}

alloc.base = alloc.end - allocStep
}

alloc.base++
Expand Down Expand Up @@ -116,6 +114,7 @@ func (alloc *AllocatorImpl) generateLocked() error {
log.Info("idAllocator allocates a new id", zap.Uint64("alloc-id", end))
idGauge.WithLabelValues("idalloc").Set(float64(end))
alloc.end = end
alloc.base = end - allocStep
return nil
}

Expand Down
40 changes: 34 additions & 6 deletions tests/server/id/id_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -51,11 +51,11 @@ func (s *testAllocIDSuite) SetUpSuite(c *C) {
func (s *testAllocIDSuite) TearDownSuite(c *C) {
s.cancel()
}

func (s *testAllocIDSuite) TestID(c *C) {
var err error
cluster, err := tests.NewTestCluster(s.ctx, 1)
defer cluster.Destroy()
c.Assert(err, IsNil)
defer cluster.Destroy()

err = cluster.RunInitialServers()
c.Assert(err, IsNil)
Expand Down Expand Up @@ -96,10 +96,9 @@ func (s *testAllocIDSuite) TestID(c *C) {
}

func (s *testAllocIDSuite) TestCommand(c *C) {
var err error
cluster, err := tests.NewTestCluster(s.ctx, 1)
defer cluster.Destroy()
c.Assert(err, IsNil)
defer cluster.Destroy()

err = cluster.RunInitialServers()
c.Assert(err, IsNil)
Expand All @@ -121,10 +120,9 @@ func (s *testAllocIDSuite) TestCommand(c *C) {
}

func (s *testAllocIDSuite) TestMonotonicID(c *C) {
var err error
cluster, err := tests.NewTestCluster(s.ctx, 2)
defer cluster.Destroy()
c.Assert(err, IsNil)
defer cluster.Destroy()

err = cluster.RunInitialServers()
c.Assert(err, IsNil)
Expand Down Expand Up @@ -164,3 +162,33 @@ func (s *testAllocIDSuite) TestMonotonicID(c *C) {
last3 = id
}
}

func (s *testAllocIDSuite) TestPDRestart(c *C) {
cluster, err := tests.NewTestCluster(s.ctx, 1)
c.Assert(err, IsNil)
defer cluster.Destroy()

err = cluster.RunInitialServers()
c.Assert(err, IsNil)
cluster.WaitLeader()
leaderServer := cluster.GetServer(cluster.GetLeader())

var last uint64
for i := uint64(0); i < 10; i++ {
id, err := leaderServer.GetAllocator().Alloc()
c.Assert(err, IsNil)
c.Assert(id, Greater, last)
last = id
}

c.Assert(leaderServer.Stop(), IsNil)
c.Assert(leaderServer.Run(), IsNil)
cluster.WaitLeader()

for i := uint64(0); i < 10; i++ {
id, err := leaderServer.GetAllocator().Alloc()
c.Assert(err, IsNil)
c.Assert(id, Greater, last)
last = id
}
}