});
                } catch (final Exception e) {
                    logger.warn("Failed to send a test mail.", e);
                } finally {
                    SMailCallbackContext.clearPreparedMessageHookOnThread();
                }
            }
            resultBuf.append("Status of ").append(ping.getClusterName()).append(" is changed to ").append(ping.getClusterStatus())
                    .append('.');

                    }
                    postcard.setJobname(systemProperties.getProperty("job.runtime.name", StringUtil.EMPTY));
                });
            } finally {
                SMailCallbackContext.clearPreparedMessageHookOnThread();
            }
        }
    }

    private String getValueFromMap(final Map<String, String> dataMap, final String key, final String defaultValue) {
        final String value = dataMap.get(key);