for_instance to support more concurrent spawning

binderhub/launcher.py

@@ -109,7 +109,7 @@ async def api_request(self, url, *args, **kwargs):
         retry_delay = self.retry_delay
         for i in range(1, self.retries + 1):
             try:
-                return await AsyncHTTPClient().fetch(req)
+                return await AsyncHTTPClient(force_instance=True).fetch(req)
             except HTTPError as e:
                 # swallow 409 errors on retry only (not first attempt)
                 if i > 1 and e.code == 409 and e.response:
@@ -190,7 +190,6 @@ async def launch(
           - `token`: the token for the server
         """
         # TODO: validate the image argument?
-
         #get gpu availability data
         config = generate_config()
 

binderhub/main.py

@@ -97,7 +97,7 @@ async def get(self, provider_prefix, _unescaped_spec):
 
             # Check if the nbviewer URL is valid and would display something
             # useful to the reader, if not we don't show it
-            client = AsyncHTTPClient()
+            client = AsyncHTTPClient(force_instance=True)
             # quote any unicode characters in the URL
             proto, rest = nbviewer_url.split("://")
             rest = urllib.parse.quote(rest)