fix(os/gcfg): ignore fsnotify event error to avoid package gcfg totally failing

os/gcfg/gcfg_adapter_file.go

@@ -297,7 +297,7 @@ func (a *AdapterFile) getJson(fileNameOrPath ...string) (configJson *gjson.Json,
 		// Add monitor for this configuration file,
 		// any changes of this file will refresh its cache in the Config object.
 		if filePath != "" && !gres.Contains(filePath) {
-			_, err = gfsnotify.Add(filePath, func(event *gfsnotify.Event) {
+			_, err := gfsnotify.Add(filePath, func(event *gfsnotify.Event) {
 				a.jsonMap.Remove(usedFileNameOrPath)
 				if event.IsWrite() || event.IsRemove() || event.IsCreate() || event.IsRename() || event.IsChmod() {
 					fileType := gfile.ExtName(usedFileNameOrPath)
@@ -316,9 +316,10 @@ func (a *AdapterFile) getJson(fileNameOrPath ...string) (configJson *gjson.Json,
 					}
 					a.notifyWatchers(adapterCtx.Ctx)
 				}
+				_ = event.Watcher.Remove(filePath)
 			})
 			if err != nil {
-				return nil
+				intlog.Errorf(context.TODO(), "failed listen config file event[%s]: %v", filePath, err)
 			}
 		}
 		return configJson

os/gfsnotify/gfsnotify_watcher.go

@@ -20,8 +20,7 @@ import (
 // The parameter `path` can be either a file or a directory path.
 // The optional parameter `recursive` specifies whether monitoring the `path` recursively,
 // which is true in default.
-func (w *Watcher) Add(
-	path string, callbackFunc func(event *Event), option ...WatchOption,
+func (w *Watcher) Add(path string, callbackFunc func(event *Event), option ...WatchOption,
 ) (callback *Callback, err error) {
 	return w.AddOnce("", path, callbackFunc, option...)
 }
@@ -35,8 +34,7 @@ func (w *Watcher) Add(
 // The parameter `path` can be either a file or a directory path.
 // The optional parameter `recursive` specifies whether monitoring the `path` recursively,
 // which is true in default.
-func (w *Watcher) AddOnce(
-	name, path string, callbackFunc func(event *Event), option ...WatchOption,
+func (w *Watcher) AddOnce(name, path string, callbackFunc func(event *Event), option ...WatchOption,
 ) (callback *Callback, err error) {
 	var watchOption = w.getWatchOption(option...)
 	w.nameSet.AddIfNotExistFuncLock(name, func() bool {
@@ -89,8 +87,7 @@ func (w *Watcher) getWatchOption(option ...WatchOption) WatchOption {
 
 // addWithCallbackFunc adds the path to underlying monitor, creates and returns a callback object.
 // Very note that if it calls multiple times with the same `path`, the latest one will overwrite the previous one.
-func (w *Watcher) addWithCallbackFunc(
-	name, path string, callbackFunc func(event *Event), option ...WatchOption,
+func (w *Watcher) addWithCallbackFunc(name, path string, callbackFunc func(event *Event), option ...WatchOption,
 ) (callback *Callback, err error) {
 	var watchOption = w.getWatchOption(option...)
 	// Check and convert the given path to absolute path.