mappjzc commented on code in PR #3764:
URL: 
https://github.com/apache/incubator-devlake/pull/3764#discussion_r1027761590


##########
models/migrationscripts/20221115_add_parallel_labels.go:
##########
@@ -0,0 +1,69 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package migrationscripts
+
+import (
+       "github.com/apache/incubator-devlake/errors"
+       "github.com/apache/incubator-devlake/plugins/core"
+       "time"
+)
+
+type DbPipelineLabel20221115 struct {
+       CreatedAt  time.Time `json:"createdAt"`
+       UpdatedAt  time.Time `json:"updatedAt"`
+       PipelineId uint64    `json:"pipeline_id" gorm:"primaryKey"`
+       Name       string    `json:"name" gorm:"primaryKey"`
+}
+
+func (DbPipelineLabel20221115) TableName() string {
+       return "_devlake_pipeline_labels"
+}
+
+type DbBlueprintLabel20221115 struct {
+       CreatedAt   time.Time `json:"createdAt"`
+       UpdatedAt   time.Time `json:"updatedAt"`
+       BlueprintId uint64    `json:"blueprint_id" gorm:"primaryKey"`
+       Name        string    `json:"name" gorm:"primaryKey"`
+}
+
+func (DbBlueprintLabel20221115) TableName() string {
+       return "_devlake_blueprint_labels"
+}
+
+type addLabels struct{}
+
+func (*addLabels) Up(res core.BasicRes) errors.Error {
+       db := res.GetDal()
+       err := db.AutoMigrate(&DbPipelineLabel20221115{})
+       if err != nil {
+               return err
+       }
+       err = db.AutoMigrate(&DbBlueprintLabel20221115{})

Review Comment:
   why don't use migrationhelper.AutoMigrateTables?



##########
services/pipeline.go:
##########
@@ -165,29 +167,57 @@ func RunPipelineInQueue(pipelineMaxParallel int64) {
                }
                globalPipelineLog.Info("get lock and wait next pipeline")
                dbPipeline := &models.DbPipeline{}
+               var dbLabels []models.DbPipelineLabel
                for {
                        cronLocker.Lock()
+                       // prepare query to find an appropriate pipeline to 
execute
                        db.Where("status IN ?", []string{models.TASK_CREATED, 
models.TASK_RERUN}).
+                               Joins(`left join _devlake_pipeline_labels ON
+                  _devlake_pipeline_labels.pipeline_id = _devlake_pipelines.id 
AND
+                  _devlake_pipeline_labels.name LIKE 'parallel/%' AND
+                  _devlake_pipeline_labels.name in ?`, runningParallelLabels).
+                               Group(`id`).
+                               
Having(`count(_devlake_pipeline_labels.name)=0`).
+                               Select("id").
                                Order("id ASC").Limit(1).Find(dbPipeline)
                        cronLocker.Unlock()
                        if dbPipeline.ID != 0 {
-                               db.Model(&models.DbPipeline{}).Where("id = ?", 
dbPipeline.ID).Updates(map[string]interface{}{
-                                       "status":   models.TASK_RUNNING,
-                                       "message":  "",
-                                       "began_at": time.Now(),
-                               })
                                break
                        }
                        time.Sleep(time.Second)
                }
-               go func(pipelineId uint64) {
+
+               db.Model(&models.DbPipeline{}).Where("id = ?", 
dbPipeline.ID).Updates(map[string]interface{}{
+                       "status":   models.TASK_RUNNING,
+                       "message":  "",
+                       "began_at": time.Now(),
+               })
+               dbPipeline, dbLabels, err = GetDbPipeline(dbPipeline.ID)
+               if err != nil {
+                       panic(err)
+               }
+
+               // add pipelineParallelLabels to runningParallelLabels
+               var pipelineParallelLabels []string
+               for _, dbLabel := range dbLabels {
+                       if strings.HasPrefix(dbLabel.Name, `parallel/`) {
+                               pipelineParallelLabels = 
append(pipelineParallelLabels, dbLabel.Name)
+                       }
+               }
+               runningParallelLabels = append(runningParallelLabels, 
pipelineParallelLabels...)
+
+               go func(pipelineId uint64, parallelLabels []string) {
                        defer sema.Release(1)
-                       globalPipelineLog.Info("run pipeline, %d", pipelineId)
+                       defer func() {
+                               runningParallelLabels = 
utils.SliceRemove(runningParallelLabels, parallelLabels...)

Review Comment:
   The append and SliceRemove operations on runningParallelLabels are not 
thread safe.



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