Open Brand new server crashes with FTBUtilites error on startup

[Gmoff01]

Summary of the problem Brand new server crashes with FTBUtilites error on startup

Pack Version 1.0.0

What is the bug? When creating a brand new DW20 1.10.X server and starting it up, I get an exception from FTBUtilities. If I delete that mod, the server starts up fine and I can connect. This is obviously not the ideal fix.

Mod & Version FTBUtilities-1.10.2-3.1.4

Link to log file http://pastebin.com/z3qhEwQK

Is it repeatable? Just starting up the fresh server gets this error every time.

Known Fix Deleting FTBUtilities from the server allows a normal startup

 

[mrsmn]

Have you by any chance named your world: "world" (with quotes?)
Because if that's the case, FTBUtils doesn't seem to like that: Caused by: java.lang.NumberFormatException: For input string: "world"

 

[Henry Link]

Also, you need to take a serious look at your Java arguments.

    JVM Flags: 9 total; -Xms10G -Xmx20G -XX:PermSize=1G -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:+CMSClassUnloadingEnabled -XX:ParallelGCThreads=2 -XX:MinHeapFreeRatio=5 -XX:MaxHeapFreeRatio=10

PermSize is no longer used with java 8 and can be removed. Xms and XmX are way to high. This will cause java to spend more time doing memory management. Server will run fine with a lot less. May I suggest you try the following instead of using the outdated arguments that were used with java 7?

-Xms512M -Xmx6G -XX:+AggressiveOpts -XX:+UseG1GC -XX:+DisableExplicitGC -XX:MaxGCPauseMillis=10 -XX:SoftRefLRUPolicyMSPerMB=10000 -XX:ParallelGCThreads=3

 

[Henry Link]

Have you by any chance named your world: "world" (with quotes?)
Because if that's the case, FTBUtils doesn't seem to like that: Caused by: java.lang.NumberFormatException: For input string: "world"

I'm not sure I buy this. Servers always use "world" for game save data. Been that way for years going back to at least 1.4.7. And I have two 1.10 servers running now and both have FTBU in them and no issues with "world" for the game save.