18:20:26 [WARNING] [Server] The main thread failed to respond after 10 seconds
18:20:26 [WARNING] [Server] Probable Plugin cause: 'Shield'
18:20:26 [WARNING] [Server] What follows is the stack trace of the main thread
18:20:26 [WARNING] [Server]     at java.lang.String.toLowerCase(String.java:2413)
18:20:26 [WARNING] [Server]     at java.lang.String.toLowerCase(String.java:2496)
18:20:26 [WARNING] [Server]     at org.bukkit.plugin.SimplePluginManager.getPermission(SimplePluginManager.java:566)
18:20:26 [WARNING] [Server]     at org.bukkit.permissions.PermissibleBase.calculateChildPermissions(PermissibleBase.java:182)
18:20:26 [WARNING] [Server]     at org.bukkit.permissions.PermissibleBase.calculateChildPermissions(PermissibleBase.java:190)
18:20:26 [WARNING] [Server]     at org.bukkit.permissions.PermissibleBase.recalculatePermissions(PermissibleBase.java:157)
18:20:26 [WARNING] [Server]     at org.bukkit.craftbukkit.v1_5_R3.command.ServerCommandSender.recalculatePermissions(ServerCommandSender.java:57)
18:20:26 [WARNING] [Server]     at org.bukkit.permissions.Permission.recalculatePermissibles(Permission.java:160)
18:20:26 [WARNING] [Server]     at org.bukkit.permissions.Permission.<init>(Permission.java:65)
18:20:26 [WARNING] [Server]     at org.bukkit.permissions.Permission.<init>(Permission.java:26)
18:20:26 [WARNING] [Server]     at com.hotmail.ooosssososos.Shield.onClick(Shield.java:108)
18:20:26 [WARNING] [Server]     at sun.reflect.GeneratedMethodAccessor305.invoke(Unknown Source)
18:20:26 [WARNING] [Server]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
18:20:26 [WARNING] [Server]     at java.lang.reflect.Method.invoke(Method.java:597)
18:20:26 [WARNING] [Server]     at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
18:20:26 [WARNING] [Server]     at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
18:20:26 [WARNING] [Server]     at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:30)
18:20:26 [WARNING] [Server]     at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:478)
18:20:26 [WARNING] [Server]     at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:463)
18:20:26 [WARNING] [Server]     at org.bukkit.craftbukkit.v1_5_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:186)
18:20:26 [WARNING] [Server]     at net.minecraft.server.v1_5_R3.PlayerInteractManager.interact(PlayerInteractManager.java:371)
18:20:26 [WARNING] [Server]     at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java:637)
18:20:26 [WARNING] [Server]     at net.minecraft.server.v1_5_R3.Packet15Place.handle(SourceFile:58)
18:20:26 [WARNING] [Server]     at org.spigotmc.netty.NettyNetworkManager.b(NettyNetworkManager.java:218)
18:20:26 [WARNING] [Server]     at net.minecraft.server.v1_5_R3.PlayerConnection.d(PlayerConnection.java:115)
18:20:26 [WARNING] [Server]     at net.minecraft.server.v1_5_R3.ServerConnection.b(SourceFile:35)
18:20:26 [WARNING] [Server]     at org.spigotmc.MultiplexingServerConnection.b(MultiplexingServerConnection.java:72)