[Artifact Regression] Sync thread and network thread hitch spam on newer artifacts

[Whisperisgod]

What happened?

After updating our FiveM server from artifact b25770/Win to newer artifacts, we started experiencing frequent and continuous sync thread and network thread hitch/warning messages.

The server does not exhibit this behavior when running artifact b25770/Win. The issue appears after switching to newer artifact versions.

The warnings occur repeatedly and can spam the server console, even though the server configuration and resources remain unchanged.

Expected result

The server should maintain normal sync and network thread performance after updating to a newer artifact, without continuous sync thread and network thread hitch warnings. At minimum, the behavior should be consistent between artifact versions when using the same server configuration and resources.

Reproduction steps

Run the server using artifact b25770/Win.
Use the same server configuration, resources, database, and player load.
Observe the server performance and console output.
Update the server to a newer/current artifact.
Start the server using exactly the same configuration and resources.
Observe the server console and thread performance.
sync thread and network thread hitch/warning messages begin occurring repeatedly and are heavily spammed.

The issue appears to be artifact-version dependent, as reverting back to b25770/Win removes the behavior.

Importancy

Unknown

Area(s)

FiveM

Specific version(s)

b25770/Win

Additional information

The server configuration and resources are kept unchanged when switching between artifact versions.

The main difference is the FiveM artifact version itself.

The behavior strongly suggests a regression introduced in newer artifacts, as the same server environment operates normally on b25770/Win.

I can provide console logs, profiler information, server configuration, and additional testing results if needed.

[normal88]

Hi, Sometimes, if the logo is too large, it can cause this to happen. Please check it.

[Whisperisgod]

Hi, Sometimes, if the logo is too large, it can cause this to happen. Please check it.

Which logo?

There is a 512x512 logo

[Gogsi]

Hello, if you can record an ETW trace while the hitches are happening and send them to me on Discord @Gogsi123. Applies for everyone having these.

[ShamZy9]

Same issue here randomly network hitch, and mass disconnects.
(only with new artifacts, when i switch back to 25770 it stops)

[VenomSA]

Can confirm, same issue here.

[czsquizer]

To help effectively Cfx team debug this issue, I would suggest providing a server-side ETW from time of the issue:
https://support.cfx.re/hc/en-us/articles/8366604193436-Creating-an-Event-Tracing-for-Windows-ETW-trace-log-for-FiveM-Troubleshooting

[Whisperisgod]

This issue has been fixed in artifacts 35574.

[anvu23198]

@ShamZy9 were u able to figure out the issue with mass disconnect?

[constanciooeste]

Hi, I’m experiencing a very similar issue on my RedM/FXServer server.

In my case, the problem only happens when I use newer FXServer artifacts.

With artifact 25770, the server remains stable and this problem does not happen.

When I use a recent artifact, the behavior is:

• After a server restart, svNetwork / svSync / svMain start around 1–3 ms.
• As uptime increases, especially after a few hours, svNetwork starts increasing progressively.
• It can go from ~2 ms to 10–15 ms, then 30–60+ ms.
• Eventually I start getting repeated warnings like:

network thread hitch warning: timer interval of 301 milliseconds
network thread hitch warning: timer interval of 392 milliseconds
network thread hitch warning: timer interval of 530 milliseconds
network thread hitch warning: timer interval of 458 milliseconds
network thread hitch warning: timer interval of 514 milliseconds
network thread hitch warning: timer interval of 542 milliseconds

• At that point, players start disconnecting / timing out in large numbers.
• After restarting the server, everything immediately goes back to normal.

The issue can start happening with around 90+ players on the newer artifacts.

However, I have tested the exact same server, resources, database and configuration using artifact 25770, and the issue does not occur.

With artifact 25770, this same server has handled up to approximately 300 simultaneous players without this progressive svNetwork degradation, without repeated network thread hitch warnings, and without these mass disconnections.

Because of this, the difference between artifact 25770 and newer artifacts has been very consistent in my tests.

I also captured an FXServer profiler exactly while the network thread hitches were happening. I could not identify any single Lua resource blocking for 300–500 ms, which makes me suspect that the issue may be related to the native network/sync thread rather than one specific Lua script.

I saw that this issue was marked as fixed in artifact 35574, so I wanted to report that I am still able to reproduce very similar behavior when using newer artifacts.

Could this be another regression, or is there anything specific you would like me to capture to help diagnose it?

I can provide:

• svNetwork / svSync / svMain graphs
• FXServer profiler captures taken while the issue is happening
• Console logs showing the network thread hitch warnings
• Player count and server uptime information
• Comparison tests between artifact 25770 and newer artifacts

If needed, I can also run additional tests on specific artifact versions to help identify where the regression starts.

[ShamZy9]

should be fixed on 35574, if not make sure to do a server side etw trace ( https://support.cfx.re/hc/en-us/articles/8366604193436-Creating-an-Event-Tracing-for-Windows-ETW-trace-log-for-FiveM-Troubleshooting ) ) and send it to gogsi or upload it here

[anvu23198]

should be fixed on 35574, if not make sure to do a server side etw trace ( https://support.cfx.re/hc/en-us/articles/8366604193436-Creating-an-Event-Tracing-for-Windows-ETW-trace-log-for-FiveM-Troubleshooting ) ) and send it to gogsi or upload it here

are you on windows? or linux?