Problem/Bug Server randomly kept crashing

---- Minecraft Crash Report ----
// Why is it breaking

Time: 1/15/19 12:13 PM
Description: Watching Server

java.lang.Error
at sun.misc.Unsafe.park(Native Method)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:967)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1283)
at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:727)
at com.earth2me.essentials.storage.AsyncStorageObjectHolder.acquireReadLock(AsyncStorageObjectHolder.java:38)
at com.earth2me.essentials.spawn.SpawnStorage.getSpawn(SpawnStorage.java:50)
at com.earth2me.essentials.spawn.Commandspawn.respawn(Commandspawn.java:51)
at com.earth2me.essentials.spawn.Commandspawn.run(Commandspawn.java:33)
at com.earth2me.essentials.commands.EssentialsCommand.run(EssentialsCommand.java:157)
at com.earth2me.essentials.Essentials.onCommandEssentials(Essentials.java:514)
at com.earth2me.essentials.spawn.EssentialsSpawn.onCommand(EssentialsSpawn.java:64)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140)
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:628)
at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1338)
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1198)
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:37)
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:9)
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46)
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:696)
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:371)
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:651)
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:555)
at java.lang.Thread.run(Thread.java:748)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server Watchdog
Stacktrace:
at sun.misc.Unsafe.park(Native Method)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:967)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1283)
at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:727)
at com.earth2me.essentials.storage.AsyncStorageObjectHolder.acquireReadLock(AsyncStorageObjectHolder.java:38)
at com.earth2me.essentials.spawn.SpawnStorage.getSpawn(SpawnStorage.java:50)
at com.earth2me.essentials.spawn.Commandspawn.respawn(Commandspawn.java:51)
at com.earth2me.essentials.spawn.Commandspawn.run(Commandspawn.java:33)
at com.earth2me.essentials.commands.EssentialsCommand.run(EssentialsCommand.java:157)
at com.earth2me.essentials.Essentials.onCommandEssentials(Essentials.java:514)
at com.earth2me.essentials.spawn.EssentialsSpawn.onCommand(EssentialsSpawn.java:64)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140)
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:628)
at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1338)
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1198)
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:37)
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:9)
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46)
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:696)
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:371)
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:651)

-- Thread Dump --
Details:
Threads: "Netty Epoll Server IO #4" Id=82 RUNNABLE (in native)
at io.netty.channel.epoll.Native.epollWait0(Native Method)
at io.netty.channel.epoll.Native.epollWait(Native.java:114)
at io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:235)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:252)
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886)
at java.lang.Thread.run(Thread.java:748)


"Netty Epoll Server IO #3" Id=78 RUNNABLE (in native)
at io.netty.channel.epoll.Native.epollWait0(Native Method)
at io.netty.channel.epoll.Native.epollWait(Native.java:114)
at io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:235)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:252)
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886)
at java.lang.Thread.run(Thread.java:748)


"Netty Epoll Server IO #2" Id=74 BLOCKED on java.util.ArrayDeque@5a8bac0 owned by "Server thread" Id=21
at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:1416)
- blocked on java.util.ArrayDeque@5a8bac0
at net.minecraft.server.v1_12_R1.MinecraftServer.postToMainThread(MinecraftServer.java:1430)
at net.minecraft.server.v1_12_R1.WorldServer.postToMainThread(WorldServer.java:1391)
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.ensureMainThread(SourceFile:10)
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:478)
at net.minecraft.server.v1_12_R1.PacketPlayInFlying.a(SourceFile:126)
at net.minecraft.server.v1_12_R1.PacketPlayInFlying$PacketPlayInPosition.a(SourceFile:57)
at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:117)
...


"File IO Thread" Id=72 TIMED_WAITING
at java.lang.Thread.sleep(Native Method)
at net.minecraft.server.v1_12_R1.FileIOThread.c(SourceFile:51)
at net.minecraft.server.v1_12_R1.FileIOThread.run(SourceFile:30)
at java.lang.Thread.run(Thread.java:748)


"Orebfuscator ProximityHider Thread" Id=71 TIMED_WAITING
at java.lang.Thread.sleep(Native Method)
at com.lishid.orebfuscator.obfuscation.ProximityHider.run(ProximityHider.java:72)