util/admin: fix the error of "invalid list index" when cancel ddl jobs (#12402)

meta/meta.go

@@ -485,8 +485,13 @@ func (m *Meta) enQueueDDLJob(key []byte, job *model.Job) error {
 }
 
 // EnQueueDDLJob adds a DDL job to the list.
-func (m *Meta) EnQueueDDLJob(job *model.Job) error {
-	return m.enQueueDDLJob(m.jobListKey, job)
+func (m *Meta) EnQueueDDLJob(job *model.Job, jobListKeys ...JobListKeyType) error {
+	listKey := m.jobListKey
+	if len(jobListKeys) != 0 {
+		listKey = jobListKeys[0]
+	}
+
+	return m.enQueueDDLJob(listKey, job)
 }
 
 func (m *Meta) deQueueDDLJob(key []byte) (*model.Job, error) {

util/admin/admin.go

@@ -124,13 +124,18 @@ func CancelJobs(txn kv.Transaction, ids []int64) ([]error, error) {
 		return nil, nil
 	}
 
-	jobs, err := GetDDLJobs(txn)
+	errs := make([]error, len(ids))
+	t := meta.NewMeta(txn)
+	generalJobs, err := getDDLJobsInQueue(t, meta.DefaultJobListKey)
+	if err != nil {
+		return nil, errors.Trace(err)
+	}
+	addIdxJobs, err := getDDLJobsInQueue(t, meta.AddIndexJobListKey)
 	if err != nil {
 		return nil, errors.Trace(err)
 	}
+	jobs := append(generalJobs, addIdxJobs...)
 
-	errs := make([]error, len(ids))
-	t := meta.NewMeta(txn)
 	for i, id := range ids {
 		found := false
 		for j, job := range jobs {
@@ -163,7 +168,8 @@ func CancelJobs(txn kv.Transaction, ids []int64) ([]error, error) {
 				continue
 			}
 			if job.Type == model.ActionAddIndex {
-				err = t.UpdateDDLJob(int64(j), job, true, meta.AddIndexJobListKey)
+				offset := int64(j - len(generalJobs))
+				err = t.UpdateDDLJob(offset, job, true, meta.AddIndexJobListKey)
 			} else {
 				err = t.UpdateDDLJob(int64(j), job, true)
 			}

util/admin/admin_test.go

@@ -220,6 +220,38 @@ func (s *testSuite) TestCancelJobs(c *C) {
 		c.Assert(err, IsNil)
 	}
 
+	// When both types of jobs exist in the DDL queue,
+	// we first cancel the job with a larger ID.
+	job := &model.Job{
+		ID:       1000,
+		SchemaID: 1,
+		TableID:  2,
+		Type:     model.ActionAddIndex,
+	}
+	job1 := &model.Job{
+		ID:       1001,
+		SchemaID: 1,
+		TableID:  2,
+		Type:     model.ActionAddColumn,
+	}
+	job2 := &model.Job{
+		ID:       1002,
+		SchemaID: 1,
+		TableID:  2,
+		Type:     model.ActionAddIndex,
+	}
+	err = t.EnQueueDDLJob(job, meta.AddIndexJobListKey)
+	c.Assert(err, IsNil)
+	err = t.EnQueueDDLJob(job1)
+	c.Assert(err, IsNil)
+	err = t.EnQueueDDLJob(job2, meta.AddIndexJobListKey)
+	c.Assert(err, IsNil)
+	errs, err = CancelJobs(txn, []int64{job1.ID, job.ID, job2.ID})
+	c.Assert(err, IsNil)
+	for _, err := range errs {
+		c.Assert(err, IsNil)
+	}
+
 	err = txn.Rollback()
 	c.Assert(err, IsNil)
 }