Addressing review comments

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/operation/mgt/dao/impl/OperationMappingDAOImpl.java

@@ -264,8 +264,10 @@ public class OperationMappingDAOImpl implements OperationMappingDAO {
                 }
             }
         } catch (SQLException e) {
-            throw new OperationManagementDAOException("Error occurred while fetching pending operation mappings for " +
-                                                      "active devices of type '" + deviceTypeId + "'", e);
+            String msg = "Error occurred while fetching pending operation mappings for " +
+                         "active devices of type '" + deviceTypeId + "'";
+            log.error(msg, e);
+            throw new OperationManagementDAOException(msg, e);
         }
         return enrolmentOperationMappingList;
     }

components/heartbeat-management/io.entgra.server.bootup.heartbeat.beacon/src/main/java/io/entgra/server/bootup/heartbeat/beacon/dao/util/HeartBeatBeaconDAOUtil.java

@@ -62,29 +62,6 @@ public final class HeartBeatBeaconDAOUtil {
         }
     }
 
-    /**
-     * Cleanup resources used to transaction
-     *
-     * @param stmt Statement used
-     * @param rs   Obtained results set
-     */
-    public static void cleanupResources(Statement stmt, ResultSet rs) {
-        if (rs != null) {
-            try {
-                rs.close();
-            } catch (SQLException e) {
-                log.warn("Error occurred while closing result set", e);
-            }
-        }
-        if (stmt != null) {
-            try {
-                stmt.close();
-            } catch (SQLException e) {
-                log.warn("Error occurred while closing prepared statement", e);
-            }
-        }
-    }
-
     /**
      * Lookup datasource using name and jndi properties
      *

components/heartbeat-management/io.entgra.server.bootup.heartbeat.beacon/src/main/java/io/entgra/server/bootup/heartbeat/beacon/service/HeartBeatManagementServiceImpl.java

@@ -85,6 +85,7 @@ public class HeartBeatManagementServiceImpl implements HeartBeatManagementServic
             }
         } else {
             String msg = "Heart Beat Configuration Disabled. Server Context Information Not available.";
+            log.error(msg);
             throw new HeartBeatManagementException(msg);
         }
         return serverCtxInfo;
@@ -129,6 +130,7 @@ public class HeartBeatManagementServiceImpl implements HeartBeatManagementServic
             }
         } else {
             String msg = "Heart Beat Configuration Disabled. Updating Server Context Failed.";
+            log.error(msg);
             throw new HeartBeatManagementException(msg);
         }
         return uuid;
@@ -161,6 +163,7 @@ public class HeartBeatManagementServiceImpl implements HeartBeatManagementServic
             }
         } else {
             String msg = "Heart Beat Configuration Disabled. Error occurred while checking if server is qualified to execute randomly designated task.";
+            log.error(msg);
             throw new HeartBeatManagementException(msg);
         }
         return isQualified;
@@ -204,6 +207,7 @@ public class HeartBeatManagementServiceImpl implements HeartBeatManagementServic
             }
         } else {
             String msg = "Heart Beat Configuration Disabled. Updating acknowledged task list failed.";
+            log.error(msg);
             throw new HeartBeatManagementException(msg);
         }
         return result;
@@ -245,6 +249,7 @@ public class HeartBeatManagementServiceImpl implements HeartBeatManagementServic
             }
         } else {
             String msg = "Heart Beat Configuration Disabled. Error electing candidate for dynamic task execution.";
+            log.error(msg);
             throw new HeartBeatManagementException(msg);
         }
     }