Bukkit

What is the issue?
It keeps printing this message onto the console. I'm not sure if this is causing my memory leak. Please advise:

Please provide any additional information below.

... 3 more
29.08 06:29:48 [Server] INFO at org.bukkit.craftbukkit.v1_9_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
29.08 06:29:48 [Server] INFO at org.bukkit.craftbukkit.v1_9_R2.scheduler.CraftTask.run(CraftTask.java:71)
29.08 06:29:48 [Server] INFO at com.rogue.adminchat.metrics.Metrics$1.run(Metrics.java:245)
29.08 06:29:48 [Server] INFO at com.rogue.adminchat.metrics.Metrics.access$400(Metrics.java:64)
29.08 06:29:48 [Server] INFO at com.rogue.adminchat.metrics.Metrics.postPlugin(Metrics.java:357)
29.08 06:29:48 [Server] INFO Caused by: java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
29.08 06:29:48 [Server] INFO at java.lang.Thread.run(Unknown Source)
29.08 06:29:48 [Server] INFO at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
29.08 06:29:48 [Server] INFO at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
29.08 06:29:48 [Server] INFO at org.bukkit.craftbukkit.v1_9_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
29.08 06:29:48 [Server] WARN org.apache.commons.lang.UnhandledException: Plugin Admin-Chat v1.4.3 generated an exception while executing task 23
29.08 06:29:48 [Server] WARN Exception in thread "Craft Scheduler Thread - 11766

29.08 06:29:48 [Server] INFO Caused by: java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;

If i am good the lastest version fix this. (1.4.4)

So far i know it is caused by using the old Metrics. 

• Update Metrics

This shouldn't be an issue in 1.4.4.