Is the response.body().asInputStream loads whole file into memory?

I encountered an Out of Memory (OOM) error when using the response as a receiver while attempting to download a 6GB file. Upon investigation, I discovered that Feign doesn't seem to support downloading large files as inputstream.

final boolean shouldDisconnectResponseBody = response.body() != null
    && response.body().length() != null
    && response.body().length() <= MAX_RESPONSE_BUFFER_SIZE;
if (!shouldDisconnectResponseBody) {
  return response;
}

Start by tracing response.body().asInputStream() and the MAX_RESPONSE_BUFFER_SIZE condition shown in the issue. Reproduce the 6GB download case and determine whether the response is buffered; done means large responses can be consumed as an input stream without an Out of Memory error.