Log debug process completion

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/OperationManagerImpl.java

@@ -190,8 +190,10 @@ public class OperationManagerImpl implements OperationManager {
 
                 if (pendingDeviceList.size() > 0) {
                     if (authorizedDeviceList.size() == pendingDeviceList.size()) {
-                        log.debug("All the devices contain a pending operation for the Operation Code: "
+                        if (log.isDebugEnabled()) {
-                                + operationCode);
+                            log.debug("All the devices contain a pending operation for the Operation Code: "
+                                    + operationCode);
+                        }
                         Activity activity = new Activity();
                         //Send the operation statuses only for admin triggered operations
                         String deviceType = validDeviceIds.get(0).getType();