Bukkit

What steps will reproduce the problem?

I don't know.  It just randomly appeared.  I did not do anything to cause the console error.  I was sitting idle.

Do you have an error log of what happened?

Please provide any additional information below.

2:19:46 AM at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
2:19:46 AM at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
2:19:46 AM at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
2:19:46 AM at java.lang.Thread.run(Unknown Source)
2:19:46 AM Caused by: java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
2:19:46 AM at com.rojel.wesv.Metrics.postPlugin(Metrics.java:335)
2:19:46 AM at com.rojel.wesv.Metrics.access$400(Metrics.java:57)
2:19:46 AM at com.rojel.wesv.Metrics$1.run(Metrics.java:223)
2:19:46 AM at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftTask.run(CraftTask.java:71)
2:19:46 AM at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
2:19:46 AM ... 3 more

The MCStats plugin metrics included in v1.4.2 are incompatible with newer Bukkit API versions. The next release of this plugin will fix this.