Fix: don't break the loop, retry.

pkg/acquisition/modules/loki/loki.go

@@ -337,6 +337,7 @@ func (l *LokiSource) StreamingAcquisition(out chan types.Event, t *tomb.Tomb) er
 	if err != nil {
 		return errors.Wrap(err, "error while getting StreamingAcquisition")
 	}
+	ll := l.logger.WithField("websocket url", l.lokiWebsocket)
 	t.Go(func() error {
 		for {
 			ctx, cancel := context.WithTimeout(context.TODO(), readyTimeout)
@@ -352,19 +353,22 @@ func (l *LokiSource) StreamingAcquisition(out chan types.Event, t *tomb.Tomb) er
 					return nil
 				}
 				if res == nil { // no body, it's a network error, not a HTTP error
-					return errors.Wrap(err, "loki StreamingAcquisition error before HTTP stack")
+					ll.WithError(err).Error("loki StreamingAcquisition error before HTTP stack")
+					break
 				}
 				buf, err2 := ioutil.ReadAll(res.Body)
 				if err2 == nil {
-					return fmt.Errorf("loki websocket (%s) error %v : %s", l.lokiWebsocket, err, string(buf))
+					ll.WithField("body", string(buf)).WithField("status", res.StatusCode).Error("loki http error")
+					break
 				}
-
-				return err2
+				ll.WithError(err2).Error("can't read loki http body")
+				break
 			}
 			defer c.Close()
 			_, reader, err := c.NextReader()
 			if err != nil {
-				return errors.Wrap(err, "loki StreamingAcquisition error while reading JSON websocket")
+				ll.WithError(err).Error("loki StreamingAcquisition error while reading JSON websocket")
+				break
 			}
 			var resp Tail
 			decoder := json.NewDecoder(reader)
@@ -377,7 +381,7 @@ func (l *LokiSource) StreamingAcquisition(out chan types.Event, t *tomb.Tomb) er
 					if err == io.EOF { // the websocket is closed
 						break
 					}
-					return errors.Wrap(err, "loki StreamingAcquisition error while parsing JSON websocket")
+					ll.WithError(err).Error("loki StreamingAcquisition error while parsing JSON websocket")
 				}
 				l.logger.WithField("type", t).WithField("message", resp).Debug("Message receveid")
 				l.readOneTail(resp, out)