> Writing a synchronous downloader script was a breeze: > [https://gitlab.com/snippets/1967018](https://gitlab.com/snippets/1967018)
Is this a wrong link? because that doesn't look synchronous. You're doing a number of things incorrectly here. One important thing to know is that you should never use waitFor in an async procedure, use await. What I believe is the problem though, is that you are reusing the same AsyncHttpClient instance for multiple concurrent requests. You need to create one AsyncHttpClient instance for each request that you want to be running concurrently. I'm going to create an issue on GitHub to show a better error message for this case. The easiest way to make this work would probably be to split up parseJson(j)["posts"] into x many lists, then run x async procs on each list which create their own AsyncHttpClient and iterate through the list downloading each one-by-one (using await instead of storing each future and awaiting them all).
