Tried without any plugins. Deleted config... But I can't get rid of this error: (my log) Code: 2012-02-02 08:27:06 [INFO] Starting minecraft server version 1.1 2012-02-02 08:27:06 [INFO] Loading properties 2012-02-02 08:27:06 [INFO] Starting Minecraft server on *:25565 2012-02-02 08:27:06 [WARNING] **** SERVER IS RUNNING IN OFFLINE/INSECURE MODE! 2012-02-02 08:27:06 [WARNING] The server will make no attempt to authenticate usernames. Beware. 2012-02-02 08:27:06 [WARNING] While this makes the game possible to play without internet access, it also opens up the ability for hackers to connect with any username they choose. 2012-02-02 08:27:06 [WARNING] To change this, set "online-mode" to "true" in the server.properties file. 2012-02-02 08:27:06 [INFO] This server is running CraftBukkit version git-Bukkit-1.1-R3-b1846jnks (MC: 1.1) (Implementing API version 1.1-R3) 2012-02-02 08:27:06 [SEVERE] java.lang.NoSuchMethodError: java.util.concurrent.locks.ReentrantLock.newCondition()Ljava/util/concurrent/locks/Condition: 2012-02-02 08:27:06 [SEVERE] at java.util.concurrent.ArrayBlockingQueue.<init>(ArrayBlockingQueue.java:167) 2012-02-02 08:27:06 [SEVERE] at java.util.concurrent.ArrayBlockingQueue.<init>(ArrayBlockingQueue.java:149) 2012-02-02 08:27:06 [SEVERE] at org.yaml.snakeyaml.emitter.Emitter.<init>(Emitter.java:160) 2012-02-02 08:27:06 [SEVERE] at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:265) 2012-02-02 08:27:06 [SEVERE] at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:261) 2012-02-02 08:27:06 [SEVERE] at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:233) 2012-02-02 08:27:06 [SEVERE] at org.yaml.snakeyaml.Yaml.dump(Yaml.java:209) 2012-02-02 08:27:06 [SEVERE] at org.bukkit.configuration.file.YamlConfiguration.saveToString(YamlConfiguration.java:36) 2012-02-02 08:27:06 [SEVERE] at org.bukkit.configuration.file.FileConfiguration.save(FileConfiguration.java:54) 2012-02-02 08:27:06 [SEVERE] at org.bukkit.craftbukkit.CraftServer.saveConfig(CraftServer.java:144) 2012-02-02 08:27:06 [SEVERE] at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:129) 2012-02-02 08:27:06 [SEVERE] at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigurationManager.java:52) 2012-02-02 08:27:06 [SEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:148) 2012-02-02 08:27:06 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:408) 2012-02-02 08:27:06 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) 2012-02-02 08:27:06 [SEVERE] Unexpected exception java.lang.NoSuchMethodError: java.util.concurrent.locks.ReentrantLock.newCondition()Ljava/util/concurrent/locks/Condition: at java.util.concurrent.ArrayBlockingQueue.<init>(ArrayBlockingQueue.java:167) at java.util.concurrent.ArrayBlockingQueue.<init>(ArrayBlockingQueue.java:149) at org.yaml.snakeyaml.emitter.Emitter.<init>(Emitter.java:160) at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:265) at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:261) at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:233) at org.yaml.snakeyaml.Yaml.dump(Yaml.java:209) at org.bukkit.configuration.file.YamlConfiguration.saveToString(YamlConfiguration.java:36) at org.bukkit.configuration.file.FileConfiguration.save(FileConfiguration.java:54) at org.bukkit.craftbukkit.CraftServer.saveConfig(CraftServer.java:144) at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:129) at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigurationManager.java:52) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:148) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:408) at net.minecraft.server.ThreadServerApplication.run(SourceFile:465) 2012-02-02 08:27:32 [INFO] Stopping server
Try to add a java parameter called "-server" to your startup script. e.g java -server -jar craftbukkit.jar nogui