[SDFAB-98] Improve logging in several ONOS subsystems

Change-Id: Ic9a20af6da27c3cc5c219657f10999f6804b9334
diff --git a/core/net/src/main/java/org/onosproject/net/pi/impl/PiPipeconfWatchdogManager.java b/core/net/src/main/java/org/onosproject/net/pi/impl/PiPipeconfWatchdogManager.java
index 103d6cf..6dea30e 100644
--- a/core/net/src/main/java/org/onosproject/net/pi/impl/PiPipeconfWatchdogManager.java
+++ b/core/net/src/main/java/org/onosproject/net/pi/impl/PiPipeconfWatchdogManager.java
@@ -271,6 +271,7 @@
         final PiPipelineProgrammable pipelineProg = device.as(PiPipelineProgrammable.class);
         final DeviceHandshaker handshaker = device.as(DeviceHandshaker.class);
         if (!handshaker.hasConnection()) {
+            log.warn("There is no connectivity with {}", device.id());
             return false;
         }
         if (Futures.getUnchecked(pipelineProg.isPipeconfSet(pipeconf)) &&