It show Meteor._wrapAsync has been renamed to Meteor.wrapAsync when I run meteor.
How to solve??
Every time you use Meteor._wrapAsync change it to Meteor.wrapAsync
It used to be an internal function form the framework, which is why it had the underscore, but they removed in when they moved into the public API.
If You didn’t call Meteor._wrapAsync then it’s likely a package… I know the CollectionFS causes this in one of my applications. For now it’s just a deprecation warning and you don’t have to worry about it too much. The next release though could completely remove it and then it would break your app. I suggest finding the culprit and filing an issue on github.