alibaba/nacos · error · PluginConfigApplyException

Plugin config source was updated but failed to apply, plugin

Error message

Plugin config source was updated but failed to apply, pluginId={pluginId}, source={sourceType}

What it means

Error "Plugin config source was updated but failed to apply, pluginId={pluginId}, source={sourceType}" thrown in alibaba/nacos.

Source

Thrown at core/src/main/java/com/alibaba/nacos/core/plugin/config/PluginConfigService.java:254

        synchronized (getPluginLock(pluginId)) {
            Map<String, String> normalizedConfig = normalizeConfig(pluginInfo, config);
            if (validateRuntimeUpdate && pluginInfo != null) {
                normalizedConfig = preserveMaskedSensitiveValues(pluginInfo, normalizedConfig,
                    sourceType);
                validateRuntimeUpdate(pluginInfo, normalizedConfig, sourceType);
            }
            resolver.updateConfig(sourceType, pluginId, normalizedConfig);
            if (pluginInfo == null) {
                return;
            }
            PluginConfigResolution resolution = resolver.resolve(pluginInfo, false);
            try {
                checker.validateEffectiveConfig(pluginInfo, resolution.getConfig());
                applier.apply(pluginId, pluginInstance, resolution.getConfig());
            } catch (RuntimeException e) {
                LOGGER.error("[PluginConfigService] Plugin config source was updated but failed "
                    + "to apply, pluginId={}, source={}", pluginId, sourceType, e);
                throw new PluginConfigApplyException("Plugin config source was updated but failed "
                    + "to apply, pluginId=" + pluginId + ", source=" + sourceType, e);
            }
            pluginInfo.setConfig(copyConfig(resolution.getConfig()));
        }
    }
    
    private void validateRuntimeUpdate(PluginInfo pluginInfo, Map<String, String> config,
        PluginConfigSourceType sourceType) {
        Map<String, String> currentConfig = resolver.getConfig(sourceType, pluginInfo);
        checker.validateRuntimeUpdate(pluginInfo, currentConfig, config);
    }
    
    private Map<String, String> preserveMaskedSensitiveValues(PluginInfo pluginInfo,
        Map<String, String> config, PluginConfigSourceType sourceType) {
        List<ConfigItemDefinition> definitions = pluginInfo.getConfigDefinitions();
        if (definitions == null || definitions.isEmpty()) {
            return config;
        }

View on GitHub (pinned to 9b989acdf1)

Solutions

1. Inspect the server logs for the underlying cause, fix it, and retry the operation.

When it happens

Trigger: Thrown at core/src/main/java/com/alibaba/nacos/core/plugin/config/PluginConfigService.java:254 when the library encounters an invalid state.

Common situations: A plugin config source update could not be applied to the plugin.

AI-assisted analysis of alibaba/nacos@9b989acdf1 (2026-08-14). Data as JSON: /api/errors/6b74ad771f76d200. Report an issue: GitHub.