Assertion `(unsigned) fd < loop->nwatchers' failed.

[kolobovdg]

I have an error like

python: src/unix/linux-core.c:336: uv__io_poll: Assertion `(unsigned) fd < loop->nwatchers' failed.
Fatal Python error: Aborted

This problem only if I use workers > 1.
There is handler, that return a fixed response like

async def status(request):
    return request.Response(text="OK", code=200)

Any ideas?

Regards
Dmitrij

[squeaky-pl]

By the looks of it, it's an assertion that fails in libuv, so this coulud be potentially a bug in libuv or uvloop itself.

One more thing, do you do any operations on the loop before starting the server?

[squeaky-pl]

I think this is linked to this bug, MagicStack/uvloop#100

So basically to solve this somebody needs to contribute support for newer uvloop versions (0.9.0+). Japronto currently works only with 0.8 series of uvloop.

[squeaky-pl]

This should be solved by now as Japronto runs on latest uvloop versions as of now. Feel free to reopen if the issue persists.