Server Crash

---- Minecraft Crash Report ----
// I feel sad now :(

Time: 6/14/17 4:01 PM
Description: Exception in server tick loop

java.lang.RuntimeException: Failed to check session lock, aborting
	at net.minecraft.server.v1_11_R1.WorldNBTStorage.i(WorldNBTStorage.java:63)
	at net.minecraft.server.v1_11_R1.WorldNBTStorage.<init>(WorldNBTStorage.java:47)
	at net.minecraft.server.v1_11_R1.ServerNBTManager.<init>(SourceFile:21)
	at net.minecraft.server.v1_11_R1.MinecraftServer.a(MinecraftServer.java:254)
	at net.minecraft.server.v1_11_R1.DedicatedServer.init(DedicatedServer.java:244)
	at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:521)
	at java.lang.Thread.run(Thread.java:745)


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

-- System Details --
Details:
	Minecraft Version: 1.11.2
	Operating System: Linux (amd64) version 2.6.32-042stab116.1
	Java Version: 1.7.0_131, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 3665500024 bytes (3495 MB) / 4116709376 bytes (3926 MB) up to 4116709376 bytes (3926 MB)
	JVM Flags: 2 total; -Xms4096M -Xmx4096M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	CraftBukkit Information:
   Running: CraftBukkit version git-Bukkit-6e3cec8 (MC: 1.11.2) (Implementing API version 1.11.2-R0.1-SNAPSHOT) true
   Plugins: {}
   Warnings: DEFAULT
   Reload Count: 0
   Threads: { RUNNABLE Netty Epoll Server IO #0: [io.netty.channel.epoll.Native.epollWait(Native Method), io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:194), io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:219), io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116), java.lang.Thread.run(Thread.java:745)], RUNNABLE Server console handler: [java.io.FileInputStream.readBytes(Native Method), java.io.FileInputStream.read(FileInputStream.java:272), java.io.BufferedInputStream.fill(BufferedInputStream.java:235), java.io.BufferedInputStream.read(BufferedInputStream.java:254), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:169), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:137), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:246), org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:261), org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:198), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readCharacter(ConsoleReader.java:2145), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readLine(ConsoleReader.java:2349), net.minecraft.server.v1_11_R1.DedicatedServer$2.run(DedicatedServer.java:83)], RUNNABLE Server thread: [java.lang.Thread.dumpThreads(Native Method), java.lang.Thread.getAllStackTraces(Thread.java:1640), org.bukkit.craftbukkit.v1_11_R1.CraftCrashReport.call(CraftCrashReport.java:30), net.minecraft.server.v1_11_R1.CrashReportSystemDetails.a(SourceFile:78), net.minecraft.server.v1_11_R1.CrashReport.h(CrashReport.java:126), net.minecraft.server.v1_11_R1.CrashReport.<init>(CrashReport.java:33), net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:571), java.lang.Thread.run(Thread.java:745)], RUNNABLE Signal Dispatcher: [], RUNNABLE DestroyJavaVM: [], WAITING Thread-5: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(LockSupport.java:186), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043), java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442), com.mojang.util.QueueLogAppender.getNextLogEvent(QueueLogAppender.java:77), org.bukkit.craftbukkit.v1_11_R1.util.TerminalConsoleWriterThread.run(TerminalConsoleWriterThread.java:27), java.lang.Thread.run(Thread.java:745)], TIMED_WAITING process reaper: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226), java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460), java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:359), java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:942), java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068), java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130), java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615), java.lang.Thread.run(Thread.java:745)], TIMED_WAITING Server Infinisleeper: [java.lang.Thread.sleep(Native Method), net.minecraft.server.v1_11_R1.DedicatedServer$1.run(DedicatedServer.java:58)], WAITING Reference Handler: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:503), java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)], WAITING Snooper Timer: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:503), java.util.TimerThread.mainLoop(Timer.java:526), java.util.TimerThread.run(Timer.java:505)], WAITING NonBlockingInputStreamThread: [java.lang.Object.wait(Native Method), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.run(NonBlockingInputStream.java:278), java.lang.Thread.run(Thread.java:745)], WAITING Finalizer: [java.lang.Object.wait(Native Method), java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135), java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151), java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)],}
   Recent tasks from -31--1{}
	Profiler Position: N/A (disabled)
	Player Count: 0 / 20; []
	Is Modded: Definitely; Server brand changed to 'CraftBukkit'
	Type: Dedicated Server (map_server.txt)