If you exit out of the map (be below the height of 0) on the server, then it crashes! Or if there is a "hole"that leads out of the map, the server crashes!
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kumasasa
Please attach crash reports ( [minecraft|http://hopper.minecraft.net/help/finding-minecraft-data-folder]/crash-reports/crash-XXXX.txt ) in the future to tickets about a crash.
Please read the Bug Report Guidelines Here.
kumasasa
Duplicate of MC-12949 - increase the RAM for Minecraft.
migrated
What to do if when raising it gives errors (I wrote-Xmx2G, -Xmx3G, -Xmx5G):
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
RAM I have enough - 5 Gb.
kumasasa
As you have a 32 bit OS, you have 3.5 GB available (the other 1.5 GB do only consume power...)
You can assign at max 1.5 GB to the JVM, sometimes even less.