I got a crash randomly when i started my server, with this:

java.lang.NoClassDefFoundError: Could not initialize class mods.railcraft.common.blocks.machine.alpha.TileBlastFurnace

Full crash-report: http://pastebin.com/R5xbU80F

Class loader errors are not something I can easily debug. You'll probably need to start removing stuff until it starts working.

These kinds of crashes are usually caused because something else broke during Forge initialization.

Could you then auto-remove these blocks? Forge "Remove Erroring Entities" didn't work with this, and the server is crashing a lot of times. Something to remove it automatically?

I have no way to detect when the classloader fails to load a class, nor any reasonable way to respond when it happens. These errors are fatal, the JVM cannot continue execution when classes are missing. You will need to first identify what mod is causing the classloader to fail (it's probably not Railcraft).

Okay :/

from the log it looks like you are running thermos, that's a pretty good candidate for being the cause