alibaba/nacos · error · NacosException

400

400

Error message

Properties cannot be null

What it means

Error "Properties cannot be null" thrown in alibaba/nacos.

Source

Thrown at maintainer-client/src/main/java/com/alibaba/nacos/maintainer/client/config/ConfigMaintainerFactory.java:54

     */
    public static ConfigMaintainerService createConfigMaintainerService(String serverList)
        throws NacosException {
        Properties properties = new Properties();
        properties.setProperty("serverAddr", serverList);
        return new NacosConfigMaintainerServiceImpl(properties);
    }
    
    /**
     * create config maintainer service.
     *
     * @param properties properties
     * @return config maintainer service
     * @throws NacosException nacos exception
     */
    public static ConfigMaintainerService createConfigMaintainerService(Properties properties)
        throws NacosException {
        if (properties == null) {
            throw new NacosException(NacosException.INVALID_PARAM, "Properties cannot be null");
        }
        return new NacosConfigMaintainerServiceImpl(properties);
    }
}

View on GitHub (pinned to 9b989acdf1)

Solutions

1. Provide a non-null value for config maintainer properties null before invoking this operation.

When it happens

Trigger: Thrown at maintainer-client/src/main/java/com/alibaba/nacos/maintainer/client/config/ConfigMaintainerFactory.java:54 when the library encounters an invalid state.

Common situations: Creating the config maintainer factory with null properties.

AI-assisted analysis of alibaba/nacos@9b989acdf1 (2026-08-14). Data as JSON: /api/errors/eaee85a0eb5b5677. Report an issue: GitHub.