diff --git a/internal/producer.go b/internal/producer.go
index a7d6c8b..766a020 100644
--- a/internal/producer.go
+++ b/internal/producer.go
@@ -1,10 +1,12 @@
 package internal
 
 import (
+	"errors"
 	"fmt"
 	"github.com/IBM/sarama"
 	"github.com/violetpay-org/queue-streamer/common"
 	"sync"
+	"time"
 )
 
 // ProducerPool is a pool of producers that can be used to produce messages to Kafka for one set of brokers.
@@ -18,6 +20,7 @@ type ProducerPool struct {
 	// For kafka
 	brokers        []string
 	configProvider func() *sarama.Config
+	monitoring     bool
 }
 
 // Take returns a producer for a given topic. If the producer does not exist, it creates a new one.
@@ -100,10 +103,15 @@ func (p *ProducerPool) generateProducer() sarama.AsyncProducer {
 	return producer
 }
 
+func (p *ProducerPool) isMonitoring() bool {
+	return p.monitoring
+}
+
 func (p *ProducerPool) monitorErrors(producer sarama.AsyncProducer) {
+	p.monitoring = true
 	for err := range producer.Errors() {
 		fmt.Println("ERROR! Failed to produce message:", err.Err)
-		if err.Err == sarama.ErrShuttingDown {
+		if errors.Is(err.Err, sarama.ErrShuttingDown) {
 			if err.Msg == nil {
 				// 프로듀서가 꺼졌는데 메시지가 남아있지 않은 경우에만 break 합니다.
 				// 메세지가 남아있는 경우 재발행해야 되기 때문에 break 하면 안됩니다.
@@ -115,6 +123,8 @@ func (p *ProducerPool) monitorErrors(producer sarama.AsyncProducer) {
 		msg := err.Msg
 		p.republishMessage(msg)
 	}
+
+	p.monitoring = false
 }
 
 // republishMessage republishes a message that failed to be produced.
@@ -122,6 +132,7 @@ func (p *ProducerPool) republishMessage(msg *sarama.ProducerMessage) {
 	// Republish message
 	producer := p.Take(common.Topic{Name: msg.Topic, Partition: msg.Partition})
 	if producer != nil {
+		time.Sleep(500 * time.Millisecond)
 		producer.Input() <- msg
 		p.Return(producer, common.Topic{Name: msg.Topic, Partition: msg.Partition})
 	} else {