dubbo-configcenter/dubbo-configcenter-nacos/src/main/java/org/apache/dubbo/configcenter/support/nacos/NacosDynamicConfiguration.java [122:155]:
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                                    + (i < retryTimes
                                            ? "Dubbo will try to retry in " + sleepMsBetweenRetries + ". "
                                            : "Exceed retry max times.")
                                    + "Try times: "
                                    + (i + 1));
                }
                tmpConfigServices.shutDown();
                tmpConfigServices = null;
                Thread.sleep(sleepMsBetweenRetries);
            }
        } catch (NacosException e) {
            logger.error(CONFIG_ERROR_NACOS, "", "", e.getErrMsg(), e);
            throw new IllegalStateException(e);
        } catch (InterruptedException e) {
            logger.error(INTERNAL_INTERRUPTED, "", "", "Interrupted when creating nacos config service client.", e);
            Thread.currentThread().interrupt();
            throw new IllegalStateException(e);
        }

        if (tmpConfigServices == null) {
            logger.error(
                    CONFIG_ERROR_NACOS,
                    "",
                    "",
                    "Failed to create nacos config service client. Reason: server status check failed.");
            throw new IllegalStateException(
                    "Failed to create nacos config service client. Reason: server status check failed.");
        }

        return new NacosConfigServiceWrapper(tmpConfigServices);
    }

    private boolean testConfigService(ConfigService configService) {
        try {
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dubbo-metadata/dubbo-metadata-report-nacos/src/main/java/org/apache/dubbo/metadata/store/nacos/NacosMetadataReport.java [118:151]:
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                                    + (i < retryTimes
                                            ? "Dubbo will try to retry in " + sleepMsBetweenRetries + ". "
                                            : "Exceed retry max times.")
                                    + "Try times: "
                                    + (i + 1));
                }
                tmpConfigServices.shutDown();
                tmpConfigServices = null;
                Thread.sleep(sleepMsBetweenRetries);
            }
        } catch (NacosException e) {
            logger.error(CONFIG_ERROR_NACOS, "", "", e.getErrMsg(), e);
            throw new IllegalStateException(e);
        } catch (InterruptedException e) {
            logger.error(INTERNAL_INTERRUPTED, "", "", "Interrupted when creating nacos config service client.", e);
            Thread.currentThread().interrupt();
            throw new IllegalStateException(e);
        }

        if (tmpConfigServices == null) {
            logger.error(
                    CONFIG_ERROR_NACOS,
                    "",
                    "",
                    "Failed to create nacos config service client. Reason: server status check failed.");
            throw new IllegalStateException(
                    "Failed to create nacos config service client. Reason: server status check failed.");
        }

        return new NacosConfigServiceWrapper(tmpConfigServices);
    }

    private boolean testConfigService(ConfigService configService) {
        try {
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