Program: 34396
Project: 34396
Buggy source:
/** 
 * Adds an entry in the log of diagnostic information for the device.  The log may be pruned as the new entry is added. If no date is supplied,  the entry is added with the current date and time. <p> Refer to   <a href="https://docs.internetofthings.ibmcloud.com/swagger/v0002.html#!/Device_Diagnostics/post_device_types_typeId_devices_deviceId_diag_logs">link</a>  for more information about the schema to be used </p>
 * @param deviceType String which contains device type
 * @param deviceId String which contains device id
 * @return boolean containing the status of the load addition.
 * @throws IoTFCReSTException Failure in adding the diagnostic logs
 */
public boolean addDiagnosticLog(String deviceType,String deviceId,JsonElement log) throws IoTFCReSTException {
  final String METHOD="String_Node_Str";
  StringBuilder sb=new StringBuilder("String_Node_Str");
  sb.append(orgId).append('.').append(BASIC_API_V0002_URL).append("String_Node_Str").append(deviceType).append("String_Node_Str").append(deviceId).append("String_Node_Str");
  int code=0;
  HttpResponse response=null;
  try {
    response=connect("String_Node_Str",sb.toString(),log.toString(),null);
    code=response.getStatusLine().getStatusCode();
    if (code == 201) {
      return true;
    }
  }
 catch (  Exception e) {
    IoTFCReSTException ex=new IoTFCReSTException("String_Node_Str" + "String_Node_Str" + e.getMessage());
    ex.initCause(e);
    throw ex;
  }
  if (code == 500) {
    throw new IoTFCReSTException(500,"String_Node_Str");
  }
  throwException(response,METHOD);
  return false;
}

Fixed version (ground truth):
/** 
 * Adds an entry in the log of diagnostic information for the device.  The log may be pruned as the new entry is added. If no date is supplied,  the entry is added with the current date and time. <p> Refer to   <a href="https://docs.internetofthings.ibmcloud.com/swagger/v0002.html#!/Device_Diagnostics/post_device_types_typeId_devices_deviceId_diag_logs">link</a>  for more information about the schema to be used </p>
 * @param deviceType String which contains device type
 * @param deviceId String which contains device id
 * @param log the Log message to be added
 * @return boolean containing the status of the load addition.
 * @throws IoTFCReSTException Failure in adding the diagnostic logs
 */
public boolean addDiagnosticLog(String deviceType,String deviceId,JsonElement log) throws IoTFCReSTException {
  final String METHOD="String_Node_Str";
  StringBuilder sb=new StringBuilder("String_Node_Str");
  sb.append(orgId).append('.').append(BASIC_API_V0002_URL).append("String_Node_Str").append(deviceType).append("String_Node_Str").append(deviceId).append("String_Node_Str");
  int code=0;
  HttpResponse response=null;
  try {
    response=connect("String_Node_Str",sb.toString(),log.toString(),null);
    code=response.getStatusLine().getStatusCode();
    if (code == 201) {
      return true;
    }
  }
 catch (  Exception e) {
    IoTFCReSTException ex=new IoTFCReSTException("String_Node_Str" + "String_Node_Str" + e.getMessage());
    ex.initCause(e);
    throw ex;
  }
  if (code == 500) {
    throw new IoTFCReSTException(500,"String_Node_Str");
  }
  throwException(response,METHOD);
  return false;
}