ddl: remove wait time after canceling a job

ddl/db_test.go

@@ -4595,3 +4595,33 @@ func (s *testDBSuite) TestModifyColumnCharset(c *C) {
 			") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin"))
 
 }
+
+func (s *testDBSuite) TestCanceledJobTakeTime(c *C) {
+	tk := testkit.NewTestKit(c, s.store)
+	tk.MustExec("use test")
+	tk.MustExec("create table t_cjtt(a int)")
+
+	hook := &ddl.TestDDLCallback{}
+	once := sync.Once{}
+	hook.OnJobUpdatedExported = func(job *model.Job) {
+		once.Do(func() {
+			err := kv.RunInNewTxn(s.store, false, func(txn kv.Transaction) error {
+				t := meta.NewMeta(txn)
+				return t.DropTable(job.SchemaID, job.TableID, true)
+			})
+			c.Assert(err, IsNil)
+		})
+	}
+	s.dom.DDL().(ddl.DDLForTest).SetHook(hook)
+
+	originalWT := ddl.WaitTimeWhenErrorOccured
+	ddl.WaitTimeWhenErrorOccured = 1 * time.Second
+	defer func() { ddl.WaitTimeWhenErrorOccured = originalWT }()
+	startTime := time.Now()
+	s.testErrorCode(c, "alter table t_cjtt add column b int", mysql.ErrNoSuchTable)
+	sub := time.Since(startTime)
+	c.Assert(sub, Less, ddl.WaitTimeWhenErrorOccured)
+
+	hook = &ddl.TestDDLCallback{}
+	s.dom.DDL().(ddl.DDLForTest).SetHook(hook)
+}

ddl/ddl_worker.go

@@ -419,7 +419,7 @@ func (w *worker) handleDDLJobQueue(d *ddlCtx) error {
 		// If the job is done or still running or rolling back, we will wait 2 * lease time to guarantee other servers to update
 		// the newest schema.
 		w.waitSchemaChanged(nil, d, waitTime, schemaVer, job)
-		if job.IsSynced() {
+		if job.IsSynced() || job.IsCancelled() {
 			asyncNotify(d.ddlJobDoneCh)
 		}
 	}
@@ -519,15 +519,15 @@ func (w *worker) runDDLJob(d *ddlCtx, t *meta.Meta, job *model.Job) (ver int64,
 
 	// Save errors in job, so that others can know errors happened.
 	if err != nil {
-		// If job is not cancelled, we should log this error.
-		if job.State != model.JobStateCancelled {
-			log.Errorf("[ddl-%s] run DDL job err %v", w, errors.ErrorStack(err))
-		} else {
-			log.Infof("[ddl-%s] the DDL job is normal to cancel because %v", w, errors.ErrorStack(err))
-		}
-
 		job.Error = toTError(err)
 		job.ErrorCount++
+
+		// If job is cancelled, we shouldn't return this error.
+		if job.State == model.JobStateCancelled {
+			log.Infof("[ddl-%s] the DDL job is normal to cancel because %v", w, errors.ErrorStack(err))
+			return ver, nil
+		}
+		log.Errorf("[ddl-%s] run DDL job err %v", w, errors.ErrorStack(err))
 	}
 	return
 }