diff --git a/src/client/WFKafkaClient.cc b/src/client/WFKafkaClient.cc
index b55b93ff..4f010db1 100644
--- a/src/client/WFKafkaClient.cc
+++ b/src/client/WFKafkaClient.cc
@@ -1480,7 +1480,7 @@ SubTask *WFKafkaTask::done()
 	return series->pop();
 }
 
-void WFKafkaClient::init(const std::string& broker)
+int WFKafkaClient::init(const std::string& broker)
 {
 	std::vector<std::string> broker_hosts;
 	std::string::size_type pos = broker.find(',');
@@ -1514,21 +1514,24 @@ void WFKafkaClient::init(const std::string& broker)
 
 	this->member = new KafkaMember;
 	this->member->broker_hosts = std::move(broker_hosts);
+	return 0;
 }
 
-void WFKafkaClient::init(const std::string& broker, const std::string& group)
+int WFKafkaClient::init(const std::string& broker, const std::string& group)
 {
 	this->init(broker);
 	this->member->cgroup.set_group(group);
 	this->member->status |= KAFKA_CGROUP_INIT | KAFKA_HEARTBEAT_INIT;
+	return 0;
 }
 
-void WFKafkaClient::deinit()
+int WFKafkaClient::deinit()
 {
 	this->member->mutex.lock();
 	this->member->status |= KAFKA_DEINIT;
 	this->member->decref();
 	this->member->mutex.unlock();
+	return 0;
 }
 
 WFKafkaTask *WFKafkaClient::create_kafka_task(const std::string& query,
diff --git a/src/client/WFKafkaClient.h b/src/client/WFKafkaClient.h
index bf006d05..f36dd458 100644
--- a/src/client/WFKafkaClient.h
+++ b/src/client/WFKafkaClient.h
@@ -131,11 +131,11 @@ public:
 	// example: kafka://kafka.sogou
 	// example: kafka.sogou:9090
 	// example: kafka://10.160.23.23:9000,10.123.23.23,kafka://kafka.sogou
-	void init(const std::string& broker_url);
+	int init(const std::string& broker_url);
 
-	void init(const std::string& broker_url, const std::string& group);
+	int init(const std::string& broker_url, const std::string& group);
 
-	void deinit();
+	int deinit();
 
 	// example: topic=xxx&topic=yyy&api=fetch
 	// example: api=commit