diff --git a/src/main/scala/mesosphere/marathon/event/http/HttpEventActor.scala b/src/main/scala/mesosphere/marathon/event/http/HttpEventActor.scala
index ca0ed0c4e00..ad48c63bdb8 100644
--- a/src/main/scala/mesosphere/marathon/event/http/HttpEventActor.scala
+++ b/src/main/scala/mesosphere/marathon/event/http/HttpEventActor.scala
@@ -2,16 +2,15 @@ package mesosphere.marathon.event.http
 
 import akka.actor._
 import akka.pattern.ask
+import mesosphere.marathon.api.v2.json.Formats._
 import mesosphere.marathon.event._
 import mesosphere.marathon.event.http.SubscribersKeeperActor.GetSubscribers
-import play.api.libs.json.{ JsValue, Json }
-import spray.client.pipelining.{ sendReceive, _ }
-import spray.http.{ HttpRequest, HttpResponse }
+import spray.client.pipelining.{sendReceive, _}
+import spray.http.{HttpRequest, HttpResponse}
 import spray.httpx.PlayJsonSupport
-import mesosphere.marathon.api.v2.json.Formats._
 
 import scala.concurrent.Future
-import scala.util.{ Failure, Success }
+import scala.util.{Failure, Success}
 
 class HttpEventActor(val subscribersKeeper: ActorRef) extends Actor with ActorLogging with PlayJsonSupport {
 
@@ -45,10 +44,9 @@ class HttpEventActor(val subscribersKeeper: ActorRef) extends Actor with ActorLo
     response.onComplete {
       case Success(res) =>
         if (res.status.isFailure)
-          log.warning(s"Failed to post $event to $urlString")
-
+          log.warning(s"Post {} to {} resulted in error response {}", event, urlString, res.status)
       case Failure(t) =>
-        log.warning(s"Failed to post $event to $urlString", t)
+        log.warning("Failed to post {} to {} reason: {}", event, urlString, t)
     }
   }
 }
diff --git a/src/main/scala/mesosphere/marathon/event/http/HttpEventStreamHandleActor.scala b/src/main/scala/mesosphere/marathon/event/http/HttpEventStreamHandleActor.scala
index cafe4a75d09..2532635eeed 100644
--- a/src/main/scala/mesosphere/marathon/event/http/HttpEventStreamHandleActor.scala
+++ b/src/main/scala/mesosphere/marathon/event/http/HttpEventStreamHandleActor.scala
@@ -76,11 +76,11 @@ class HttpEventStreamHandleActor(
       //Do not act any longer on any event.
       context.become(Actor.emptyBehavior)
     case _ =>
-      log.warning(s"Could not send message to $handle", ex)
+      log.warning("Could not send message to {} reason: {}", handle, ex)
   }
 
   private[this] def dropEvent(event: MarathonEvent): Unit = {
-    log.warning(s"Ignore event $event for handle $handle (slow consumer)")
+    log.warning("Ignore event {} for handle {} (slow consumer)", event, handle)
   }
 }
 
diff --git a/src/main/scala/mesosphere/marathon/event/http/SubscribersKeeperActor.scala b/src/main/scala/mesosphere/marathon/event/http/SubscribersKeeperActor.scala
index 2fde0486b81..6fa4e216fc1 100644
--- a/src/main/scala/mesosphere/marathon/event/http/SubscribersKeeperActor.scala
+++ b/src/main/scala/mesosphere/marathon/event/http/SubscribersKeeperActor.scala
@@ -20,7 +20,7 @@ class SubscribersKeeperActor(val store: EntityStore[EventSubscribers]) extends A
       val subscription: Future[MarathonSubscriptionEvent] =
         addResult.map { subscribers =>
           if (subscribers.urls.contains(callbackUrl))
-            log.info("Callback [%s] subscribed." format callbackUrl)
+            log.info("Callback {} subscribed.", callbackUrl)
           event
         }
 
@@ -32,7 +32,7 @@ class SubscribersKeeperActor(val store: EntityStore[EventSubscribers]) extends A
       val subscription: Future[MarathonSubscriptionEvent] =
         removeResult.map { subscribers =>
           if (!subscribers.urls.contains(callbackUrl))
-            log.info("Callback [%s] unsubscribed." format callbackUrl)
+            log.info("Callback {} unsubscribed.", callbackUrl)
           event
         }
 
@@ -48,7 +48,7 @@ class SubscribersKeeperActor(val store: EntityStore[EventSubscribers]) extends A
     store.modify(Subscribers) { deserialize =>
       val existingSubscribers = deserialize()
       if (existingSubscribers.urls.contains(callbackUrl)) {
-        log.info("Existing callback [%s] resubscribed." format callbackUrl)
+        log.info("Existing callback {} resubscribed.", callbackUrl)
         existingSubscribers
       }
       else EventSubscribers(existingSubscribers.urls + callbackUrl)
@@ -62,7 +62,7 @@ class SubscribersKeeperActor(val store: EntityStore[EventSubscribers]) extends A
         EventSubscribers(existingSubscribers.urls - callbackUrl)
 
       else {
-        log.warning("Attempted to unsubscribe nonexistent callback [%s]." format callbackUrl)
+        log.warning("Attempted to unsubscribe nonexistent callback {}", callbackUrl)
         existingSubscribers
       }
     }