1.增加对sender不存在的情况判断
1.增加对sender不存在的情况判断

andrewei1316/logkit,andrewei1316/logkit,wonderflow/logkit-1,qiniu/logkit,andrewei1316/logkit,qiniu/logkit,qiniu/logkit,andrewei1316/logkit,qiniu/logkit,wonderflow/logkit-1,wonderflow/logkit-1,qiniu/logkit,wonderflow/logkit-1