diff --git a/akka-actor/src/main/scala/akka/actor/FSM.scala b/akka-actor/src/main/scala/akka/actor/FSM.scala
index c697f28e5b..f521c77d53 100644
--- a/akka-actor/src/main/scala/akka/actor/FSM.scala
+++ b/akka-actor/src/main/scala/akka/actor/FSM.scala
@@ -646,11 +646,7 @@ trait FSM[S, D] extends Actor with Listeners with ActorLogging {
   private def terminate(nextState: State): Unit = {
     if (currentState.stopReason.isEmpty) {
       val reason = nextState.stopReason.get
-      reason match {
-        case Failure(ex: Throwable) ⇒ log.error(ex, "terminating due to Failure")
-        case Failure(msg: AnyRef)   ⇒ log.error(msg.toString)
-        case _                      ⇒
-      }
+      logTermination(reason)
       for (timer ← timers.values) timer.cancel()
       timers.clear()
       currentState = nextState
@@ -661,6 +657,16 @@ trait FSM[S, D] extends Actor with Listeners with ActorLogging {
     }
   }
 
+  /**
+   * By default [[Failure]] is logged at error level and other reason
+   * types are not logged. It is possible to override this behavior.
+   */
+  protected def logTermination(reason: Reason): Unit = reason match {
+    case Failure(ex: Throwable) ⇒ log.error(ex, "terminating due to Failure")
+    case Failure(msg: AnyRef)   ⇒ log.error(msg.toString)
+    case _                      ⇒
+  }
+
   /**
    * All messages sent to the [[akka.actor.FSM]] will be wrapped inside an
    * `Event`, which allows pattern matching to extract both state and data.
diff --git a/akka-remote/src/main/scala/akka/remote/Endpoint.scala b/akka-remote/src/main/scala/akka/remote/Endpoint.scala
index e728234edf..6ea7617e7d 100644
--- a/akka-remote/src/main/scala/akka/remote/Endpoint.scala
+++ b/akka-remote/src/main/scala/akka/remote/Endpoint.scala
@@ -82,11 +82,11 @@ private[remote] class DefaultMessageDispatcher(private val system: ExtendedActor
           // if it was originally addressed to us but is in fact remote from our point of view (i.e. remote-deployed)
           r.!(payload)(sender)
         else
-          log.error("dropping message {} for non-local recipient {} arriving at {} inbound addresses are {}",
-            payloadClass, r, recipientAddress, provider.transport.addresses)
+          log.error("dropping message [{}] for non-local recipient [{}] arriving at [{}] inbound addresses are [{}]",
+            payloadClass, r, recipientAddress, provider.transport.addresses.mkString(", "))
 
-      case r ⇒ log.error("dropping message {} for unknown recipient {} arriving at {} inbound addresses are {}",
-        payloadClass, r, recipientAddress, provider.transport.addresses)
+      case r ⇒ log.error("dropping message [{}] for unknown recipient [{}] arriving at [{}] inbound addresses are [{}]",
+        payloadClass, r, recipientAddress, provider.transport.addresses.mkString(", "))
 
     }
   }
@@ -592,8 +592,8 @@ private[remote] class EndpointWriter(
       Serialization.currentTransportInformation.withValue(Serialization.Information(h.localAddress, extendedSystem)) {
         (MessageSerializer.serialize(extendedSystem, msg.asInstanceOf[AnyRef]))
       }
-    case None ⇒ throw new EndpointException("Internal error: No handle was present during serialization of" +
-      "outbound message.")
+    case None ⇒
+      throw new EndpointException("Internal error: No handle was present during serialization of outbound message.")
   }
 
 }
diff --git a/akka-remote/src/main/scala/akka/remote/RemoteDeployer.scala b/akka-remote/src/main/scala/akka/remote/RemoteDeployer.scala
index 640f5c38bb..27317444e2 100644
--- a/akka-remote/src/main/scala/akka/remote/RemoteDeployer.scala
+++ b/akka-remote/src/main/scala/akka/remote/RemoteDeployer.scala
@@ -26,7 +26,7 @@ private[akka] class RemoteDeployer(_settings: ActorSystem.Settings, _pm: Dynamic
       case d @ Some(deploy) ⇒
         deploy.config.getString("remote") match {
           case AddressFromURIString(r) ⇒ Some(deploy.copy(scope = RemoteScope(r)))
-          case str if !str.isEmpty     ⇒ throw new ConfigurationException("unparseable remote node name " + str)
+          case str if !str.isEmpty     ⇒ throw new ConfigurationException(s"unparseable remote node name [${str}]")
           case _ ⇒
             val nodes = immutableSeq(deploy.config.getStringList("target.nodes")).map(AddressFromURIString(_))
             if (nodes.isEmpty || deploy.routerConfig == NoRouter) d
diff --git a/akka-remote/src/main/scala/akka/remote/Remoting.scala b/akka-remote/src/main/scala/akka/remote/Remoting.scala
index 90401ca176..fd02bc7108 100644
--- a/akka-remote/src/main/scala/akka/remote/Remoting.scala
+++ b/akka-remote/src/main/scala/akka/remote/Remoting.scala
@@ -208,7 +208,7 @@ private[remote] class Remoting(_system: ExtendedActorSystem, _provider: RemoteAc
   override def quarantine(remoteAddress: Address, uid: Int): Unit = endpointManager match {
     case Some(manager) ⇒ manager ! Quarantine(remoteAddress, uid)
     case _ ⇒ throw new RemoteTransportExceptionNoStackTrace(
-      s"Attempted to quarantine addres [$remoteAddress] with uid [$uid] but Remoting is not running", null)
+      s"Attempted to quarantine address [$remoteAddress] with uid [$uid] but Remoting is not running", null)
   }
 
   // Not used anywhere only to keep compatibility with RemoteTransport interface
diff --git a/akka-remote/src/main/scala/akka/remote/transport/AbstractTransportAdapter.scala b/akka-remote/src/main/scala/akka/remote/transport/AbstractTransportAdapter.scala
index d09f18c737..5b9e2fa893 100644
--- a/akka-remote/src/main/scala/akka/remote/transport/AbstractTransportAdapter.scala
+++ b/akka-remote/src/main/scala/akka/remote/transport/AbstractTransportAdapter.scala
@@ -26,13 +26,13 @@ class TransportAdapters(system: ExtendedActorSystem) extends Extension {
 
   private val adaptersTable: Map[String, TransportAdapterProvider] = for ((name, fqn) ← settings.Adapters) yield {
     name -> system.dynamicAccess.createInstanceFor[TransportAdapterProvider](fqn, immutable.Seq.empty).recover({
-      case exception ⇒ throw new IllegalArgumentException("Cannot instantiate transport adapter" + fqn, exception)
+      case e ⇒ throw new IllegalArgumentException(s"Cannot instantiate transport adapter [${fqn}]", e)
     }).get
   }
 
   def getAdapterProvider(name: String): TransportAdapterProvider = adaptersTable.get(name) match {
     case Some(provider) ⇒ provider
-    case None           ⇒ throw new IllegalArgumentException("There is no registered transport adapter provider with name: " + name)
+    case None           ⇒ throw new IllegalArgumentException(s"There is no registered transport adapter provider with name: [${name}]")
   }
 }
 
diff --git a/akka-remote/src/main/scala/akka/remote/transport/AkkaPduCodec.scala b/akka-remote/src/main/scala/akka/remote/transport/AkkaPduCodec.scala
index 979a22be97..1657d30c43 100644
--- a/akka-remote/src/main/scala/akka/remote/transport/AkkaPduCodec.scala
+++ b/akka-remote/src/main/scala/akka/remote/transport/AkkaPduCodec.scala
@@ -211,7 +211,8 @@ private[remote] object AkkaPduProtobufCodec extends AkkaPduCodec {
             cookie))
       case CommandType.SHUTDOWN  ⇒ Disassociate
       case CommandType.HEARTBEAT ⇒ Heartbeat
-      case _                     ⇒ throw new PduCodecException("Decoding of control PDU failed: format invalid", null)
+      case x ⇒
+        throw new PduCodecException(s"Decoding of control PDU failed, invalid format, unexpected: [${x}]", null)
     }
   }
 
diff --git a/akka-remote/src/main/scala/akka/remote/transport/AkkaProtocolTransport.scala b/akka-remote/src/main/scala/akka/remote/transport/AkkaProtocolTransport.scala
index 115ac04777..8e53ac9a29 100644
--- a/akka-remote/src/main/scala/akka/remote/transport/AkkaProtocolTransport.scala
+++ b/akka-remote/src/main/scala/akka/remote/transport/AkkaProtocolTransport.scala
@@ -328,8 +328,11 @@ private[transport] class ProtocolStateActor(initialData: InitialProtocolStateDat
               wrappedHandle,
               immutable.Queue.empty)
           } else {
-            log.warning(s"Association attempt with mismatching cookie from [{}]. Expected [{}] but received [{}].",
-              info.origin, localHandshakeInfo.cookie.getOrElse(""), info.cookie.getOrElse(""))
+            if (log.isDebugEnabled)
+              log.warning(s"Association attempt with mismatching cookie from [{}]. Expected [{}] but received [{}].",
+                info.origin, localHandshakeInfo.cookie.getOrElse(""), info.cookie.getOrElse(""))
+            else
+              log.warning(s"Association attempt with mismatching cookie from [{}].", info.origin)
             stop()
           }
 
@@ -362,7 +365,7 @@ private[transport] class ProtocolStateActor(initialData: InitialProtocolStateDat
             listener notify InboundPayload(payload)
             stay()
           case msg ⇒
-            throw new AkkaProtocolException("unhandled message in Open state with type " + (if (msg ne null) msg.getClass else "null"))
+            throw new AkkaProtocolException(s"unhandled message in state Open(InboundPayload) with type [${safeClassName(msg)}]")
         }
 
         case _ ⇒ stay()
@@ -376,7 +379,7 @@ private[transport] class ProtocolStateActor(initialData: InitialProtocolStateDat
         case ListenerReady(_, wrappedHandle)            ⇒ wrappedHandle
         case AssociatedWaitHandler(_, wrappedHandle, _) ⇒ wrappedHandle
         case msg ⇒
-          throw new AkkaProtocolException("unhandled message in Open state with type " + (if (msg ne null) msg.getClass else "null"))
+          throw new AkkaProtocolException(s"unhandled message in state Open(DisassociateUnderlying) with type [${safeClassName(msg)}]")
       }
       sendDisassociate(handle)
       stop()
@@ -401,6 +404,11 @@ private[transport] class ProtocolStateActor(initialData: InitialProtocolStateDat
     }
   }
 
+  private def safeClassName(obj: AnyRef): String = obj match {
+    case null ⇒ "null"
+    case _    ⇒ obj.getClass.getName
+  }
+
   override def postStop(): Unit = {
     cancelTimer("heartbeat-timer")
     super.postStop() // Pass to onTermination
@@ -428,6 +436,12 @@ private[transport] class ProtocolStateActor(initialData: InitialProtocolStateDat
 
     case StopEvent(_, _, InboundUnassociated(_, wrappedHandle)) ⇒
       wrappedHandle.disassociate()
+
+  }
+
+  override protected def logTermination(reason: FSM.Reason): Unit = reason match {
+    case FSM.Failure(TimeoutReason) ⇒ // no logging
+    case other                      ⇒ super.logTermination(reason)
   }
 
   private def listenForListenerRegistration(readHandlerPromise: Promise[HandleEventListener]): Unit =
diff --git a/akka-remote/src/main/scala/akka/remote/transport/netty/NettyTransport.scala b/akka-remote/src/main/scala/akka/remote/transport/netty/NettyTransport.scala
index 518b102844..da4220d4af 100644
--- a/akka-remote/src/main/scala/akka/remote/transport/netty/NettyTransport.scala
+++ b/akka-remote/src/main/scala/akka/remote/transport/netty/NettyTransport.scala
@@ -181,7 +181,7 @@ private[netty] abstract class ServerHandler(protected final val transport: Netty
       case listener: AssociationEventListener ⇒
         val remoteAddress = NettyTransport.addressFromSocketAddress(remoteSocketAddress, transport.schemeIdentifier,
           transport.system.name, hostName = None).getOrElse(
-            throw new NettyTransportException(s"Unknown remote address type [${remoteSocketAddress.getClass.getName}]"))
+            throw new NettyTransportException(s"Unknown inbound remote address type [${remoteSocketAddress.getClass.getName}]"))
         init(channel, remoteSocketAddress, remoteAddress, msg) { listener notify InboundAssociation(_) }
     }
   }
@@ -413,7 +413,7 @@ class NettyTransport(val settings: NettyTransportSettings, val system: ExtendedA
                   case listener ⇒ udpConnectionTable.put(addr, listener)
                 }
                 handle
-              case unknown ⇒ throw new NettyTransportException(s"Unknown remote address type [${unknown.getClass.getName}]")
+              case unknown ⇒ throw new NettyTransportException(s"Unknown outbound remote address type [${unknown.getClass.getName}]")
             }
           }
         else