zepanv

It's a visualvm snapshot, how useful would a text log of the server saying "can't keep up" be. It looks to be an interaction with natura causing it. https://github.com/MinecraftForge/MinecraftForge/issues/777

We updated our server from 846 to 859 and ran into some lag issues (constant "can't keep up" messages), reverting to 846 "fixes" it. Forge 859 - https://dl.dropboxusercontent.com/u/3730226/snap.nps Forge 846 - https://dl.dropboxusercontent.com/u/3730226/snap2.nps Not sure what change exactly does this but it makes the game unplayable.

Edit your run configurations, Arguments tab, Program arguments: --version 1.6 --tweakClass cpw.mods.fml.common.launcher.FMLTweaker Also check to be sure your working directory on that tab also resolves to forge\mcp\jars

Configure the Java Build Path for your minecraft project. Source Tab, expand the project, set the "Native library location" to where your natives are (forge/mcp/jars/versions/x/x-natives).

append --nogui to your startup script Here is mine as an example screen java -Xmx2G -Xms2G -jar minecraftforge-universal-1.4.7-6.6.0.499.zip --nogui

We are having the same issue, just tried to update our server to 1.4.7 and can't log in. Works fine ssp, looking forward to the fix!