Server error message question.

[Ronbob55]

Pardon my ignorance but I'd like to know what causes this to happen. I'm not sure which forum category this should go in so I'm asking here.

So I'm playing the Horizons mod pack and everything is going fine and not getting hardly any lag (for a change). I create my Nether portal and port over. Seems ok, I ended up on top of a long Nether fort corridor (lucky me) and build a wall around the portal. So then I dig down into the corridor and start looking around a few corners. It starts getting laggy, I move a few feet and get lag, rinse repeat.

And then the screen just freezes and I'm just stuck at that spot. The only thing I can do is alt-tab to get back to my desktop, which takes a long time. I look at the console logs and see this message several times:

2014-03-20 22:53:02 [WARNING] [Minecraft-Server] Can't keep up! Did the system time change, or is the server overloaded?

I eventually had to end the program using task manager since it was reporting the game as not responding. So this is is what I'm actually asking, what causes this to happen?

I probably included more than what was needed but I wanted to provide the lead up to when it happened.

Thanks for any help on this.

 

[kaovalin]

Pardon my ignorance but I'd like to know what causes this to happen. I'm not sure which forum category this should go in so I'm asking here.

So I'm playing the Horizons mod pack and everything is going fine and not getting hardly any lag (for a change). I create my Nether portal and port over. Seems ok, I ended up on top of a long Nether fort corridor (lucky me) and build a wall around the portal. So then I dig down into the corridor and start looking around a few corners. It starts getting laggy, I move a few feet and get lag, rinse repeat.

And then the screen just freezes and I'm just stuck at that spot. The only thing I can do is alt-tab to get back to my desktop, which takes a long time. I look at the console logs and see this message several times:
2014-03-20 22:53:02 [WARNING] [Minecraft-Server] Can't keep up! Did the system time change, or is the server overloaded?

I eventually had to end the program using task manager since it was reporting the game as not responding. So this is is what I'm actually asking, what causes this to happen?

I probably included more than what was needed but I wanted to provide the lead up to when it happened.

Thanks for any help on this.

There is a section for server admins to post support questions.

As to your question, please add in addition to this your server logs so we can see if there were any errors. As it stands, what I see is you arent able to keep up with new chunk generation and maybe that slowed you down. Also what kind of RAM does your system have, how much is allocated to the FTB client, and how much is allocated to the server?

Edit: please use

Spoiler

tags for the logs

 

[Connor Gavitt]

This isn't related to RAM usage, if the RAM was truly used up it will crash and not lag and post errors.

This warning means that the server is lagging because the CPU is overloaded, too much going on in game could be the cause or the CPU may not be able to handle FTB or however many players you have. Please post your server specs.