diff --git a/plugins/affinity-group-processors/host-anti-affinity/src/org/apache/cloudstack/affinity/HostAntiAffinityProcessor.java b/plugins/affinity-group-processors/host-anti-affinity/src/org/apache/cloudstack/affinity/HostAntiAffinityProcessor.java
index 4049571635a..4011c028546 100644
--- a/plugins/affinity-group-processors/host-anti-affinity/src/org/apache/cloudstack/affinity/HostAntiAffinityProcessor.java
+++ b/plugins/affinity-group-processors/host-anti-affinity/src/org/apache/cloudstack/affinity/HostAntiAffinityProcessor.java
@@ -68,9 +68,18 @@ public class HostAntiAffinityProcessor extends AffinityProcessorBase implements
                 if (groupVM != null && !groupVM.isRemoved()) {
                     if (groupVM.getHostId() != null) {
                         avoid.addHost(groupVM.getHostId());
+                        if (s_logger.isDebugEnabled()) {
+                            s_logger.debug("Added host " + groupVM.getHostId() + " to avoid set, since VM "
+                                    + groupVM.getId() + " is present on the host");
+                        }
                     } else if (VirtualMachine.State.Stopped.equals(groupVM.getState())
                             && groupVM.getLastHostId() != null) {
                         avoid.addHost(groupVM.getLastHostId());
+                        if (s_logger.isDebugEnabled()) {
+                            s_logger.debug("Added host " + groupVM.getLastHostId() + " to avoid set, since VM "
+                                    + groupVM.getId() + " is present on the host, in Stopped state");
+                        }
+
                     }
                 }
             }
diff --git a/server/src/org/apache/cloudstack/affinity/AffinityGroupServiceImpl.java b/server/src/org/apache/cloudstack/affinity/AffinityGroupServiceImpl.java
index e6a1254da20..559c5b2cf1e 100644
--- a/server/src/org/apache/cloudstack/affinity/AffinityGroupServiceImpl.java
+++ b/server/src/org/apache/cloudstack/affinity/AffinityGroupServiceImpl.java
@@ -327,6 +327,9 @@ public class AffinityGroupServiceImpl extends ManagerBase implements AffinityGro
             }
         }
         _affinityGroupVMMapDao.updateMap(vmId, affinityGroupIds);
+        if (s_logger.isDebugEnabled()) {
+            s_logger.debug("Updated VM :" + vmId + " affinity groups to =" + affinityGroupIds);
+        }
         // APIResponseHelper will pull out the updated affinitygroups.
         return vmInstance;