Unity-Technologies / Unity-Technologies/com.unity.netcode.gameobjects

Potential bug. NGO causes Nintendo Switch to freeze.

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priority:high stat:imported type:bug
Dominant language
C#
Stars
2.3k
Forks
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Avg merge
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Merged PRs (30d)
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Description

Description

If you put the console to sleep for a long period of time the console will hang for a period of time.

Reproduce Steps
  1. Start the game or test project
  2. Start a host but do not let any client in
  3. Put the console sleep
  4. Wait a few hours (The longer it sleeps the longer will be the freeze)
  5. Turn the console back on and return to the game.
Actual Outcome

The game is frozen for a certain amount of time. After a while the game is playable again.

Expected Outcome

The game doesn't freeze and Gameplay continue, (Except when playing online)

Environment
  • Unity Version: 2022.3.30f
  • Netcode Version: 1.9
Additional Context

Looking at a nxdump, it seems like the game is freezing in some loop somewhere involving NetworkTime, I did not have the chance to look deeper but I wanted to bring more eyes on the issue. This was the "suspicious" part I found in the dump.

IL2CPP_EXTERN_C IL2CPP_METHOD_ATTR void NetworkTime__ctor_mD40214D6A925F3027C77DA7051C210F487C0CC55 (NetworkTime_t2E4697E4558B217C431021D2CC30A9306E778B5F* __this, uint32_t ___0_tickRate, int32_t ___1_tick, double ___2_tickOffset, const RuntimeMethod* method)

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the sleep-and-resume scenario with a host and no clients, then inspect the nxdump around NetworkTime__ctor_mD40214D6A925F3027C77DA7051C210F487C0CC55. Trace the suspected NetworkTime loop and verify the game resumes without a prolonged freeze after extended sleep on Nintendo Switch.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, unity
Domain
game-dev, networking
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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