fix: retry when connect to eventbus in sensor (#816)

sensors/listener.go

@@ -33,6 +33,7 @@ import (
 	"github.com/argoproj/argo-events/common/logging"
 	"github.com/argoproj/argo-events/eventbus"
 	eventbusdriver "github.com/argoproj/argo-events/eventbus/driver"
+	"github.com/argoproj/argo-events/eventsources/sources"
 	"github.com/argoproj/argo-events/pkg/apis/sensor/v1alpha1"
 	sensordependencies "github.com/argoproj/argo-events/sensors/dependencies"
 	sensortriggers "github.com/argoproj/argo-events/sensors/triggers"
@@ -102,9 +103,14 @@ func (sensorCtx *SensorContext) ListenEvents(ctx context.Context, stopCh <-chan
 			for _, t := range triggers {
 				triggerNames = append(triggerNames, t.Template.Name)
 			}
-			conn, err := ebDriver.Connect()
+			var conn eventbusdriver.Connection
+			err = sources.Connect(&common.DefaultRetry, func() error {
+				var err error
+				conn, err = ebDriver.Connect()
+				return err
+			})
 			if err != nil {
-				logger.Error("failed to connect to event bus", zap.Error(err))
+				logger.Fatal("failed to connect to event bus", zap.Error(err))
 				return
 			}
 			defer conn.Close()