returns.json decorator results in "Too many open files" error with AiohttpClient

[selimt]

If I use the returns.json decorator with a consumer method that uses an AiohttpClient consumer then I get the following error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/var/tmp/doNotRemove/projects/catalog-client/catalog/utils.py", line 186, in async_create_namespace
    results = loop.run_until_complete(asyncio.gather(*futures))
  File "/usr/lib64/python3.7/asyncio/base_events.py", line 587, in run_until_complete
    return future.result()
  File "/var/tmp/doNotRemove/projects/catalog-client/catalog/api.py", line 1264, in create_namespace_async
    return await self.__create_namespace_async(namespace)
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/clients/io/asyncio_strategy.py", line 38, in execute
    response = yield from executable.execute()
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/clients/io/asyncio_strategy.py", line 22, in invoke
    response = yield from callback.on_success(response)
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/clients/io/asyncio_strategy.py", line 20, in invoke
    response = yield from callback.on_failure(type(error), error, tb)
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/clients/io/execution.py", line 108, in on_failure
    return self._io.fail(exc_type, exc_val, exc_tb)
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/clients/io/interfaces.py", line 303, in fail
    compat.reraise(exc_type, exc_val, exc_tb)
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/six.py", line 719, in reraise
    raise value
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/clients/io/asyncio_strategy.py", line 17, in invoke
    response = yield from func(*args, **kwargs)
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/clients/aiohttp_.py", line 29, in new_callback
    response = yield from coroutine_callback(response)
  File "/usr/lib64/python3.7/asyncio/coroutines.py", line 120, in coro
    res = func(*args, **kw)
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/hooks.py", line 20, in wrapper
    return hook(*args, **kwargs)
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/returns.py", line 39, in __call__
    return self._strategy(*args, **kwargs)
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/returns.py", line 87, in __call__
    content = response.json()
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/clients/aiohttp_.py", line 155, in __call__
    with AsyncioExecutor() as executor:
  File "/var/tmp/doNotRemove/venvs/catalog_client_python3.7/lib64/python3.7/site-packages/uplink/clients/aiohttp_.py", line 184, in __init__
    self._loop = asyncio.new_event_loop()
  File "/usr/lib64/python3.7/asyncio/events.py", line 762, in new_event_loop
    return get_event_loop_policy().new_event_loop()
  File "/usr/lib64/python3.7/asyncio/events.py", line 660, in new_event_loop
    return self._loop_factory()
  File "/usr/lib64/python3.7/asyncio/unix_events.py", line 51, in __init__
    super().__init__(selector)
  File "/usr/lib64/python3.7/asyncio/selector_events.py", line 60, in __init__
    self._make_self_pipe()
  File "/usr/lib64/python3.7/asyncio/selector_events.py", line 107, in _make_self_pipe
    self._ssock, self._csock = socket.socketpair()
  File "/usr/lib64/python3.7/socket.py", line 491, in socketpair
    a, b = _socket.socketpair(family, type, proto)
OSError: [Errno 24] Too many open files

To Reproduce
Create an AiohttpClient with a POST consumer method

create about 1000 futures like this:

    loop = asyncio.get_event_loop()
    for i in range(count):
         futures.append(consumer_instance.consumer_method())
    results = loop.run_until_complete(asyncio.gather(*futures))

Expected behavior
I should be able to pass as many as futures as needed for it to be processed through asyncio

Additional context
As a workaround I removed that decorator and I am now retrieving the json results as a separate gather step like this:

    futures = []
    for r in results:
        futures.append(r.json())
    jsons = loop.run_until_complete(asyncio.gather(*futures))

I am running with uplink 0.9.4 aiohttp 3.7.4.post0 and Python 3.7.7