RCON times out 88% of the time when using "rcon" pip package

[TomyLobo]

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• Reproduction steps:

pip install rcon
rconclt <my rcon password>@127.0.0.1:27033 help

The rconclt command hangs forver in about half of the cases.
server log when it succeeds:
 

LOG  : General     , 1645268810174> 1,664,515> RCON: new connection Socket[addr=/127.0.0.1,port=54546,localport=27033]
LOG  : General     , 1645268810176> 1,664,517> RCON: ID=1393758552 Type=3 Body='<my rcon password>' Socket[addr=/127.0.0.1,port=54546,localport=27033]
LOG  : General     , 1645268810177> 1,664,518> RCON: ID=252286249 Type=2 Body='help' Socket[addr=/127.0.0.1,port=54546,localport=27033]
LOG  : General     , 1645268810229> 1,664,570> help
LOG  : General     , 1645268810278> 1,664,619> RCON: connection closed Socket[addr=/127.0.0.1,port=54546,localport=27033]

server log when it fails:
 

LOG  : General     , 1645268909960> 1,764,301> RCON: new connection Socket[addr=/127.0.0.1,port=54550,localport=27033]
LOG  : General     , 1645268909961> 1,764,302> RCON: ID=1006733196 Type=3 Body='<my rcon password>' Socket[addr=/127.0.0.1,port=54550,localport=27033]

I ran it 100 times (with a timeout of 1s) and it timed out 88 out of 100 attempts.

I ran it 1000 times (with a timeout of 300ms) and it timed out 891 out of 1000 attempts.

 

Using https://github.com/gorcon/rcon-cli, it works every single time.

So there must be some incompatibility specifically with the rcon client from the pip package.

Edited February 19, 2022 by TomyLobo