Improved redis plug-in configuration check

Signed-off-by: hedengfeng <894220128@qq.com>

extensions/sinks/redis/redis.go

@@ -61,6 +61,8 @@ func (r *RedisSink) Configure(props map[string]interface{}) error {
 		if i, ok := i.(string); ok {
 			r.key = i
 		}
+	} else {
+		return errors.New("not config data key for redis")
 	}
 
 	if i, ok := props["field"]; ok {
@@ -187,9 +189,6 @@ func (r *RedisSink) Collect(ctx api.StreamContext, data interface{}) error {
 				}
 				logger.Debugf("send redis string success, key:%s data: %s", r.key, string(v))
 			}
-
-		} else {
-			logger.Debug("not config data key for redis")
 		}
 
 		logger.Debug("insert success", string(v))