Exception in thread "pool-3-thread-5" MultiWorld v5.2.2

Full Error code:

Code:

[23:06:19] [Server thread/INFO]: Done (6.464s)! For help, type "help" or "?"
[23:06:19] [pool-3-thread-5/WARN]: Exception in thread "pool-3-thread-5"
[23:06:19] [pool-3-thread-5/WARN]: org.apache.commons.lang.UnhandledException: Plugin MultiWorld v5.2.2 generated an exception while executing task 4
    at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()Ljava/util/Collection;
    at multiworld.metrics.Metrics.postPlugin(Metrics.java:372)
    at multiworld.metrics.Metrics.access$400(Metrics.java:56)
    at multiworld.metrics.Metrics$1.run(Metrics.java:238)
    at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftTask.run(CraftTask.java:53)
    at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
    ... 3 more

Plugins:

PHP:

AntiCheat
ChestShop
ClearLagg
GriefPrevention
homespawnwarp
iconomy
MFP
minigames
wultiworld
PermissionsEX
Simpleautomessage
vault
Worldedit
WorldGuarrd

​

Any one know what happened? the error will occurs when ever I start the server

 

Its caused by Multiworld trying to connect to metrics, for some reason metrics either changed their code or went down, i know the plugin maintainer personally and already forwarded the issue, this error can be ignored tough since it doesn't affect the plugin itself.

 

harleyknd1 Thank you!

 

Official comment of the developer: "the bug is caused by running a older version of bukkit, update to the 1.7.10 and the error should be fixed"