improve the message log

Signed-off-by: Gabriele Santomaggio <g.santomaggio@gmail.com>

Author: Gsantomaggio

pkg/stream/server_frame.go

@@ -415,7 +415,8 @@ func (c *Client) handleDeliver(r *bufio.Reader) {
 	if consumer.getStatus() == open {
 		consumer.response.chunkForConsumer <- chunk
 	} else {
-		logs.LogWarn("Consumer %s is closed", consumer.GetStreamName())
+		logs.LogDebug("The consumer %s for the stream %s is closed during the chunk dispatching. "+
+			"Messages won't dispatched", consumer.GetName(), consumer.GetStreamName())
 	}
 
 }
@@ -439,7 +440,17 @@ func (c *Client) creditNotificationFrameHandler(readProtocol *ReaderProtocol,
 	r *bufio.Reader) {
 	readProtocol.ResponseCode = uShortExtractResponseCode(readUShort(r))
 	subscriptionId := readByte(r)
-	logs.LogWarn("received a credit for an unknown subscriptionId: %d", subscriptionId)
+	consumer, err := c.coordinator.GetConsumerById(subscriptionId)
+	if err != nil {
+		logs.LogWarn("received a credit for an unknown subscriptionId: %d", subscriptionId)
+		return
+	}
+
+	if consumer != nil && consumer.getStatus() == closed {
+		logs.LogDebug("received a credit for a closed consumer %d", subscriptionId)
+		return
+	}
+
 }
 
 func (c *Client) queryOffsetFrameHandler(readProtocol *ReaderProtocol,