🐊tinybrain: katago deser & illegal move error

[Terkwood]

KataGo deser fails

Found these errors logged in tinybrain:

  [ redact ERROR tinybrain::katago] Deser error in katago response: Error("missing field `moveInfos`", line: 1, column: 100)
     raw: {"error":"Illegal move 10: G5","field":"moves","id":"aaaa-redact_12_WHITE"}
 
  [ redact ERROR tinybrain::katago] Deser error in katago response: Error("missing field `moveInfos`", line: 1, column: 103)
     raw: {"error":"Illegal move 147: O15","field":"moves","id":"bbbb-redact_149_BLACK"}

To reproduce, check journalctl after some time passes

why is it missing that field?

We should improve the logging of these failed requests

what is the illegal move error?

does this cause system downtime?

It seems so. But the downtime can also occur without the illegal move error. See #510

[Terkwood]

More of these around Mar 17.

I'm not sure if this is the cause, but, the service stopped functioning and had to be restarted ⚰️ We also changed local DNS config at the hosting site, around the same time -- but that seems unlikely to impact an existing WebSocket connection

I have some private logs dated Mar 25 which can be examined if necessary

[Terkwood]

KataGo unresponsive again, this time after doing another DNS switch at its hosting site!