diff --git a/agent/connection.go b/agent/connection.go
index 34b73a9..0655392 100644
--- a/agent/connection.go
+++ b/agent/connection.go
@@ -86,7 +86,7 @@ func (a *Agent) sender(stream eventstreamapi.EventStream_SubscribeClient) error
 		return nil
 	}
 
-	logCtx.Trace("Adding an item to the event writer", "resourceID", event.ResourceID(ev), "eventID", event.EventID(ev))
+	logCtx.Tracef("Adding an item to the event writer: resourceID %s eventID %s", event.ResourceID(ev), event.EventID(ev))
 	a.eventWriter.Add(ev)
 
 	return nil
@@ -117,13 +117,13 @@ func (a *Agent) receiver(stream eventstreamapi.EventStream_SubscribeClient) erro
 	logCtx.Debugf("Received a new event from stream")
 
 	if ev.Target() == event.TargetEventAck {
-		logCtx.Trace("Received an ACK for an event", "resourceID", ev.ResourceID(), "eventID", ev.EventID())
+		logCtx.Tracef("Received an ACK for an event: resourceID %s eventID %s", ev.ResourceID(), ev.EventID())
 		rawEvent, err := format.FromProto(rcvd.Event)
 		if err != nil {
 			return err
 		}
 		a.eventWriter.Remove(rawEvent)
-		logCtx.Trace("Removed an event from the EventWriter", "resourceID", ev.ResourceID(), "eventID", ev.EventID())
+		logCtx.Tracef("Removed an event from the EventWriter: resourceID %s eventID %s", ev.ResourceID(), ev.EventID())
 		return nil
 	}
 
@@ -137,7 +137,7 @@ func (a *Agent) receiver(stream eventstreamapi.EventStream_SubscribeClient) erro
 			return fmt.Errorf("no send queue found for the remote principal")
 		}
 		sendQ.Add(a.emitter.ProcessedEvent(event.EventProcessed, ev))
-		logCtx.Info("Sent an ACK for an event", "resourceID", ev.ResourceID(), "eventID", ev.EventID())
+		logCtx.Tracef("Sent an ACK for an event: resourceID %s eventID %s", ev.ResourceID(), ev.EventID())
 	}
 	return nil
 }
diff --git a/internal/event/event.go b/internal/event/event.go
index c10bef7..85a7d44 100644
--- a/internal/event/event.go
+++ b/internal/event/event.go
@@ -307,6 +307,7 @@ func (ew *EventWriter) Add(ev *cloudevents.Event) {
 			event:   ev,
 			backoff: &defaultBackoff,
 		}
+		ew.log.Tracef("added a new event resourceID %s eventID %s", resID, EventID(ev))
 		return
 	}
 
@@ -316,6 +317,7 @@ func (ew *EventWriter) Add(ev *cloudevents.Event) {
 	eventMsg.backoff = &defaultBackoff
 	eventMsg.retryAfter = nil
 	eventMsg.mu.Unlock()
+	ew.log.Tracef("updated an existing event: resourceID %s eventID %s", resID, EventID(ev))
 }
 
 func (ew *EventWriter) Get(resID string) *eventMessage {
@@ -367,7 +369,7 @@ func (ew *EventWriter) sendEvent(resID string) {
 	// Check if the event is already ACK'd.
 	eventMsg := ew.Get(resID)
 	if eventMsg == nil {
-		ew.log.Trace("event is not found, perhaps it is already ACK'd", "resourceID", resID)
+		ew.log.Tracef("event is not found, perhaps it is already ACK'd: resourceID %s", resID)
 		return
 	}
 
@@ -375,8 +377,11 @@ func (ew *EventWriter) sendEvent(resID string) {
 	defer eventMsg.mu.Unlock()
 
 	// Check if it is time to resend the event.
-	if eventMsg.retryAfter != nil && eventMsg.retryAfter.After(time.Now()) {
-		return
+	if eventMsg.retryAfter != nil {
+		if eventMsg.retryAfter.After(time.Now()) {
+			return
+		}
+		ew.log.Tracef("resending an event: resourceID %s eventID %s", resID, EventID(eventMsg.event))
 	}
 
 	defer func() {
@@ -398,11 +403,11 @@ func (ew *EventWriter) sendEvent(resID string) {
 		return
 	}
 
-	ew.log.Trace("event sent to target", "resourceID", resID, "type", eventMsg.event.Type())
+	ew.log.Tracef("event sent to target: resourceID %s eventID %s", resID, EventID(eventMsg.event))
 
 	// We don't have to wait for an ACK if the current event is ACK. So, remove it from the EventWriter.
 	if Target(eventMsg.event) == TargetEventAck {
 		ew.Remove(eventMsg.event)
-		ew.log.Trace("ACK is removed from the EventWriter", "resourceID", resID, "eventID", EventID(eventMsg.event))
+		ew.log.Tracef("ACK is removed from the EventWriter: resourceID: %s eventID: %s", resID, EventID(eventMsg.event))
 	}
 }
diff --git a/principal/apis/eventstream/eventstream.go b/principal/apis/eventstream/eventstream.go
index 1ffae1f..e79c27d 100644
--- a/principal/apis/eventstream/eventstream.go
+++ b/principal/apis/eventstream/eventstream.go
@@ -193,7 +193,7 @@ func (s *Server) recvFunc(c *client, subs eventstreamapi.EventStream_SubscribeSe
 	}
 
 	if event.Target(incomingEvent) == event.TargetEventAck {
-		logCtx.Trace("Received an ACK event", "resourceID", event.ResourceID(incomingEvent), "eventID", event.EventID(incomingEvent))
+		logCtx.Tracef("Received an ACK: resourceID %s eventID %s", event.ResourceID(incomingEvent), event.EventID(incomingEvent))
 		s.eventWriter.Remove(incomingEvent)
 		logCtx.Trace("Removed the ACK from the EventWriter")
 		return nil
@@ -235,7 +235,7 @@ func (s *Server) sendFunc(c *client, subs eventstreamapi.EventStream_SubscribeSe
 		return fmt.Errorf("panic: invalid data in sendqueue: want: %T, have %T", cloudevents.Event{}, item)
 	}
 
-	logCtx.Trace("Adding an item to the event writer", "resourceID", event.ResourceID(ev), "eventID", event.EventID(ev))
+	logCtx.Tracef("Adding an item to the event writer: resourceID %s eventID %s", event.ResourceID(ev), event.EventID(ev))
 	s.eventWriter.Add(ev)
 
 	q.Done(item)
diff --git a/principal/event.go b/principal/event.go
index 5a56432..9944a2c 100644
--- a/principal/event.go
+++ b/principal/event.go
@@ -286,7 +286,7 @@ func (s *Server) eventProcessor(ctx context.Context) error {
 						logCtx.Debugf("Queue disappeared -- client probably has disconnected")
 						return
 					}
-					logCtx.Trace("sending an ACK", "resourceID", event.ResourceID(ev), "eventID", event.EventID(ev))
+					logCtx.Tracef("sending an ACK: resourceID %s eventID %s", event.ResourceID(ev), event.EventID(ev))
 					sendQ.Add(s.events.ProcessedEvent(event.EventProcessed, event.New(ev, event.TargetEventAck)))
 				}(queueName, q)
 			}