diff --git a/internal/master/master.go b/internal/master/master.go
index 14ef3eb48e35645a2d9aa8a10e5aedece5a3060a..d73d8f29070ab8a5df9a0619e94a533266e30a45 100644
--- a/internal/master/master.go
+++ b/internal/master/master.go
@@ -113,9 +113,6 @@ func CreateServer(ctx context.Context) (*Master, error) {
 	pulsarProxyStream.Start()
 	var proxyStream ms.MsgStream = pulsarProxyStream
 	proxyTimeTickBarrier := newSoftTimeTickBarrier(ctx, &proxyStream, Params.ProxyIDList, Params.SoftTimeTickBarrierInterval)
-	if err := proxyTimeTickBarrier.Start(); err != nil {
-		return nil, err
-	}
 	tsMsgProducer.SetProxyTtBarrier(proxyTimeTickBarrier)
 
 	pulsarWriteStream := ms.NewPulsarMsgStream(ctx, 1024) //output stream
@@ -124,9 +121,6 @@ func CreateServer(ctx context.Context) (*Master, error) {
 	pulsarWriteStream.Start()
 	var writeStream ms.MsgStream = pulsarWriteStream
 	writeTimeTickBarrier := newHardTimeTickBarrier(ctx, &writeStream, Params.WriteNodeIDList)
-	if err := writeTimeTickBarrier.Start(); err != nil {
-		return nil, err
-	}
 	tsMsgProducer.SetWriteNodeTtBarrier(writeTimeTickBarrier)
 
 	pulsarDDStream := ms.NewPulsarMsgStream(ctx, 1024) //input stream
diff --git a/tests/python/requirements.txt b/tests/python/requirements.txt
index 7494bcd3e3926dc47225e343e0bc926f4e0185c3..b004de973fef827470342b21768803da3734ef2e 100644
--- a/tests/python/requirements.txt
+++ b/tests/python/requirements.txt
@@ -4,5 +4,5 @@ numpy==1.18.1
 pytest==5.3.4
 pytest-cov==2.8.1
 pytest-timeout==1.3.4
-pymilvus-distributed==0.0.6
+pymilvus-distributed==0.0.5
 sklearn==0.0