awc@1.0.1 No file descriptor available

awc doesn't seem to be stable enough for production. While using it for more than one month on a production server, I got too much unexpected errors.

For the same request, **curl** and **reqwest** are able to give me data, but **awc** cannot

I get also too much errors like: **No file descriptor available**, but if I send the same request with curl, I can get data, with **awc** not, everytime in this case, I restart the server, things come back to normal but it's really really annoying....

Also when I check the file descriptors, there are around `1028` **CLOSE WAIT**, even without any coming requests