[22:44:01] [Craft Scheduler Thread - 12/WARN]: org.apache.commons.lang.UnhandledException: Plugin BanManager v5.8.0 generated an exception while executing task 51 at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player; at me.confuser.banmanager.internal.mcstats.MetricsLite.postPlugin(MetricsLite.java:285) at me.confuser.banmanager.internal.mcstats.MetricsLite.access$200(MetricsLite.java:51) at me.confuser.banmanager.internal.mcstats.MetricsLite$1.run(MetricsLite.java:173) at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftTask.run(CraftTask.java:71) at org.bukkit.craftbukkit.v1_9_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53) ... 3 more

Once http://ci.frostcast.net/job/BanManager/ is online, try a dev version from there.

Metrics dependency just needs bumping. I believe there's a patching tool you can run BM through to avoid this issue until I get a chance to sort Jenkins out.