Schema fetch error in case of tuned msgpack Tarantool serializer

[filonenko-mikhail]

Env:

pip3 show asynctnt
Name: asynctnt
Version: 1.2.1

Repro:

box.cfg{listen=3301}
require('msgpack').cfg{encode_use_tostring = true}

• Error

Tarantool[127.0.0.1:3301] Schema fetch failed: Lost connection to Tarantool
Future exception was never retrieved
future: <Future finished exception=TarantoolNotConnectedError('Lost connection to Tarantool')>
asynctnt.exceptions.TarantoolNotConnectedError: Lost connection to Tarantool

In the same case, sync tarantool connector works fine

[igorcoding]

Hello, sorry but I can't reproduce it. Used the following init.lua and python script

box.cfg{listen=3301}
require('msgpack').cfg{encode_use_tostring = true}

import asynctnt
import asyncio

import logging
logging.basicConfig(level=logging.DEBUG)


async def main():
    c = await asynctnt.connect()
    while True:
        try:
            print(await c.ping())
        except Exception as e:
            print(e)
        await asyncio.sleep(1)

asyncio.run(main())

I restarted tarantool several times and everything seems to be working correctly. Could you please provide some more info on how to reproduce it? Maybe there are some types that asynctnt does not support?
Tarantool version I used - Tarantool 2.7.2-0-g4d8c068
Python version - 3.9.4

[filonenko-mikhail]

Sorry, seems that repro a little bit harder

• os macosx 10.15.7
• Tarantool 2.8.1
• Python 3.9.6

I attach snap and xlogs

• Archive.zip
• init.lua

box.cfg({listen="127.0.0.1:3301"})
require('msgpack').cfg{encode_invalid_as_nil = true}

• ex.py

import asyncio
import asynctnt

async def main():
    conn = asynctnt.Connection(host='127.0.0.1', port=3301, username="storage", password="passw0rd")
    await conn.connect()

    await conn.call('box.schema.space.create', ['geo', {"if_not_exists":True}])
    await conn.call('box.space.geo:format', [ [{"name":"id", "type":"string"}] ])

    await conn.disconnect()
    
asyncio.run(main())