Crashing when someone joins the server


New user
I haven't a clue why this just crashed, working fine for a few hours and all of a sudden my completely vanilla minecraft server crashes and makes this error in the crash reports. I literally changed nothing on the server, just downloaded today and was working. Anyone know what's going on here, and how to fix?
---- Minecraft Crash Report ----
// Why did you do that?
Time: 5/9/15 9:22 PM Description: Exception in server tick loop
java.lang.Error: Failed to create temporary file for jnidispatch library: Access is denied at com.sun.jna.Native.loadNativeLibraryFromJar( at com.sun.jna.Native.loadNativeLibrary( at com.sun.jna.Native.( at com.sun.jna.Pointer.( at com.sun.jna.platform.win32.WinReg$HKEY.( at com.sun.jna.platform.win32.WinReg.( at at g.(SourceFile:16) at net.minecraft.server.MinecraftServer.B(SourceFile:579) at ko.B(SourceFile:299) at net.minecraft.server.MinecraftServer.A(SourceFile:535) at at Source)
A detailed walkthrough of the error, its code path and all known details is as follows:
-- System Details -- Details: Minecraft Version: 1.8.4 Operating System: Windows 8.1 (x86) version 6.3 CPU: ~~ERROR~~ NoClassDefFoundError: Could not initialize class g Java Version: 1.8.0_45, Oracle Corporation Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation Memory: 407319672 bytes (388 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB) JVM Flags: 2 total; -Xms512m -Xmx1024m IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94 Profiler Position: N/A (disabled) Player Count: 1 / 20; [lf['Leon1717'/942, l='world', x=166.50, y=64.00, z=250.50]] Is Modded: Unknown (can't tell) Type: Dedicated Server (map_server.txt)


Regular user
Forum Supporter
You have to start a new world. It happens sometimes. A weird object gets placed and deleted but not registered its deletion.

Backup the current world tho. I could be wrong. Ticking loops are weird things.

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