Bukkit

What steps will reproduce the problem?
1. using latest spigot
2. worked fine before the newest update
3.

[21:40:10] [Craft Scheduler Thread - 2549/WARN]: Exception in thread "Craft Scheduler Thread - 2549"
[21:40:10] [Craft Scheduler Thread - 2549/WARN]: org.apache.commons.lang.UnhandledException: Plugin AutoAnnouncer v1.7-03.23 generated an exception while executing task 59
    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.IllegalStateException: Asynchronous entity track!
    at org.spigotmc.AsyncCatcher.catchOp(AsyncCatcher.java:14)
    at net.minecraft.server.v1_9_R1.EntityTracker.addEntity(EntityTracker.java:105)
    at net.minecraft.server.v1_9_R1.EntityTracker.track(EntityTracker.java:81)
    at net.minecraft.server.v1_9_R1.WorldManager.a(WorldManager.java:18)
    at net.minecraft.server.v1_9_R1.World.b(World.java:1015)
    at net.minecraft.server.v1_9_R1.WorldServer.b(WorldServer.java:1120)
    at net.minecraft.server.v1_9_R1.WorldServer.a(WorldServer.java:1085)
    at net.minecraft.server.v1_9_R1.Chunk.addEntities(Chunk.java:753)
    at org.bukkit.craftbukkit.v1_9_R1.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:45)
    at org.bukkit.craftbukkit.v1_9_R1.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:1)
    at org.bukkit.craftbukkit.v1_9_R1.util.AsynchronousExecutor.skipQueue(AsynchronousExecutor.java:337)
    at org.bukkit.craftbukkit.v1_9_R1.util.AsynchronousExecutor.getSkipQueue(AsynchronousExecutor.java:295)
    at org.bukkit.craftbukkit.v1_9_R1.chunkio.ChunkIOExecutor.syncChunkLoad(ChunkIOExecutor.java:16)
    at net.minecraft.server.v1_9_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:136)
    at net.minecraft.server.v1_9_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:118)
    at net.minecraft.server.v1_9_R1.ChunkProviderServer.getOrCreateChunkFast(ChunkProviderServer.java:76)
    at net.minecraft.server.v1_9_R1.World.getChunkAt(World.java:324)
    at net.minecraft.server.v1_9_R1.World.getChunkAtWorldCoords(World.java:320)
    at net.minecraft.server.v1_9_R1.World.getType(World.java:743)
    at net.minecraft.server.v1_9_R1.TileEntityCommand$1.i(TileEntityCommand.java:31)
    at net.minecraft.server.v1_9_R1.CommandBlockListenerAbstract.sendMessage(CommandBlockListenerAbstract.java:270)
    at org.bukkit.craftbukkit.v1_9_R1.command.CraftBlockCommandSender.sendMessage(CraftBlockCommandSender.java:27)
    at org.bukkit.craftbukkit.v1_9_R1.CraftServer.broadcast(CraftServer.java:1284)
    at org.bukkit.craftbukkit.v1_9_R1.CraftServer.broadcastMessage(CraftServer.java:452)
    at com.sectorgamer.sharkiller.AutoAnnouncer.Announcer$printAnnounce.run(Announcer.java:269)
    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

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