Merge "Replace exception.printStacktrace with write to log."

diff --combined opendaylight/switchmanager/implementation/src/main/java/org/opendaylight/controller/switchmanager/internal/SwitchManager.java
index 1390f94b494c423198abde7736b4e77f965046d0,dd89954db248f3a5a8cf4d694f6ba7b680e0f4a4..d82c9967425839dcc1fbd10efe74120c03efd03f
--- 1/opendaylight/switchmanager/implementation/src/main/java/org/opendaylight/controller/switchmanager/internal/SwitchManager.java
--- 2/opendaylight/switchmanager/implementation/src/main/java/org/opendaylight/controller/switchmanager/internal/SwitchManager.java
+++ b/opendaylight/switchmanager/implementation/src/main/java/org/opendaylight/controller/switchmanager/internal/SwitchManager.java
@@@ -1104,7 -1104,7 +1104,7 @@@ public class SwitchManager implements I
      @Override
      public Set<Node> getNodes() {
          return (nodeProps != null) ? new HashSet<Node>(nodeProps.keySet())
 -                : null;
 +                : new HashSet<Node>();
      }
  
      /*
@@@ -1382,7 -1382,7 +1382,7 @@@
                          try {
                              map.put(s, new NodeConnector(entry.getValue()));
                          } catch (ConstructionException e) {
-                             e.printStackTrace();
+                             log.error("An error occured",e);
                          }
                      }
                  }
@@@ -1444,7 -1444,7 +1444,7 @@@
                              try {
                                  map.put(s, new NodeConnector(entry.getValue()));
                              } catch (ConstructionException e) {
-                                 e.printStackTrace();
+                                 log.error("An error occured",e);
                              }
                          }
                          map.remove(name.getValue());
@@@ -1481,7 -1481,7 +1481,7 @@@
                          try {
                              map.put(s, new NodeConnector(entry.getValue()));
                          } catch (ConstructionException e) {
-                             e.printStackTrace();
+                             log.error("An error occured",e);
                          }
                      }
                      map.remove(name.getValue());