diff --git a/plugin/migration/index_comparison/index_comparison.go b/plugin/migration/index_comparison/index_comparison.go
index 3505a75a..f31d6ffe 100644
--- a/plugin/migration/index_comparison/index_comparison.go
+++ b/plugin/migration/index_comparison/index_comparison.go
@@ -344,6 +344,7 @@ func (p *processor) handleRunningSubTask(taskItem *task.Task) error {
 			p.saveTaskAndWriteLog(taskItem, &task.TaskResult{
 				Success: false,
 			}, fmt.Sprintf("index comparison failed, source/target doc count unmatch: %d / %d", sourceDocs, targetDocs))
+			p.cleanGatewayQueue(taskItem)
 			p.scheduler.DecrInstanceJobs(instanceID)
 			return nil
 		}
@@ -372,6 +373,7 @@ func (p *processor) handleRunningSubTask(taskItem *task.Task) error {
 					Success: false,
 					Error:   "data unmatch",
 				}, fmt.Sprintf("index comparison failed, only in source: %d, only in target: %d, diff in both: %d (sample doc ids: [%s], [%s] [%s])", onlyInSource, onlyInTarget, diffBoth, onlyInSourceKeys, onlyInTargetKeys, diffBothKeys))
+				p.cleanGatewayQueue(taskItem)
 				p.scheduler.DecrInstanceJobs(instanceID)
 				return nil
 			}
@@ -385,6 +387,7 @@ func (p *processor) handleRunningSubTask(taskItem *task.Task) error {
 			Success: false,
 			Error:   "pipeline task failed",
 		}, "index comparison failed")
+		p.cleanGatewayQueue(taskItem)
 		p.scheduler.DecrInstanceJobs(instanceID)
 		return nil
 	}
@@ -395,6 +398,7 @@ func (p *processor) handleRunningSubTask(taskItem *task.Task) error {
 	p.saveTaskAndWriteLog(taskItem, &task.TaskResult{
 		Success: true,
 	}, "index comparison completed")
+	p.cleanGatewayQueue(taskItem)
 	p.scheduler.DecrInstanceJobs(instanceID)
 
 	return nil