Send Buffer is full, ignoring error

[tarynkelley]

I'm sometimes getting the message:

Send Buffer is full, ignoring error:
A non-blocking socket operation could not be performed immediately.

And in this moment the rust server seems to freeze and lag very much.

Is this probably a Network attack on the server?

 

[BogdanWDK]

That error is caused by c# plugins/modules.
Please post your logs from the day you got the error.
@DreTaX can tell us more.

 

[Jakkee]

Could also be because you're upload speed is poor and can't handle that many players at once.
I used to get it wayyyy back when running off of my laptop.
Would only happen once I hit 25+players.
Could also have nothing to do with upload speed, that was just my take on it

 

[tarynkelley]

My Rust server is running on a VPS.

I get this message only very rare. They only appear for some seconds and then the server works fine again. So its not a big problem for me, I was only wondering what it means.

 

[tarynkelley]

I'm getting the
Send Buffer is full, ignoring error: A non-blocking socket operation could not b
e completed immediately error now very often on a dedicated server with Windows 2012 R2.

What could be the problem?

 

[Jakkee]

I'm getting the
Send Buffer is full, ignoring error: A non-blocking socket operation could not b
e completed immediately error now very often on a dedicated server with Windows 2012 R2.

What could be the problem?

I used to get that while hosting on a laptop, Anyway you've reached the "Sending buffer" as it say in the error, Maybe poor upload speed / connection to players?

 

[tarynkelley]

I'm not hosting on a low end device.

Its a 2.8 GHZ Quad Core i5 with 16 GB RAM and 100mbit up/down in a Datacenter.

 

[Jakkee]

I'm not hosting on a low end device.

Its a 2.8 GHZ Quad Core i5 with 16 GB RAM and 100mbit up/down in a Datacenter.

How many cores you got?
Or is a dedicated machine?

 

[tarynkelley]

It is a dedicated machine. I have 4 cores and CPU load is at 14 %. RAM load at 20%

Nothing else is running than Rust Server .

 

[Jakkee]

If I remember correctly, Rust only uses 1 core. Maybe it's maxing out one of your cores?
If not then I don't really have an answer sorry

 

[tarynkelley]

The core(s) can go upto 3,1 GHZ. I don't think its because of that. I changed in the Taskmanger to the Logical Processors and all CPU Cores are balanced

 

[tarynkelley]

I noticed there is always an Upload Throughput spike when this error is happening.
My max upload speed is 100Mbit.

 

[tarynkelley]

I increased the Transmit buffer size of the Intel Gigabit Adapter to 2048.

This seem to have fixed the problem.

 

[DreTaX]

I increased the Transmit buffer size of the Intel Gigabit Adapter to 2048.

This seem to have fixed the problem.

What does that mean?

 

[tarynkelley]

I followed this tutorial

http://www.intel.com/content/www/us/en/support/network-and-i-o/ethernet-products/000005811.html

but the send buffer messages are still there, but not so often as before.

 

[tarynkelley]

I noticed that this message is appearing when players are in an area with a lot of buildings / structures.

For example my Small Rads is looking like this:



When i teleport to this area and the structures get loaded the error message immediately show up.

I also noticed that there is a spike in the servers upload traffic.

Normal is around 500 Kbps but it goes up to 3-4 and upto 10 mbit.

 

[DreTaX]

I noticed that this message is appearing when players are in an area with a lot of buildings / structures.

For example my Small Rads is looking like this:

View attachment 1360

When i teleport to this area and the structures get loaded the error message immediately show up.

I also noticed that there is a spike in the servers upload traffic.

Normal is around 500 Kbps but it goes up to 3-4 and upto 10 mbit.

You might be right. I think the server tries to.send all the objects at once

Sent From My Samsung Galaxy S4

 

[tarynkelley]

I also tested it with the original uLink version. Same results.

 

[DreTaX]

I wonder which method is putting that error message up

Sent From My Samsung Galaxy S4

 

[tarynkelley]

The same error I also get on a more powerful dedicated server (Dual Xeon) and on a vanilla Rust Server.