server crashed

03.06 01:43:00 [Server] ERROR The server has stopped responding!
03.06 01:43:00 [Server] ERROR Please report this to http://www.spigotmc.org/
03.06 01:43:00 [Server] ERROR Be sure to include ALL relevant console errors and Minecraft crash reports
03.06 01:43:00 [Server] ERROR Spigot version: git-Spigot-3fb9445-6e3cec8 (MC: 1.11.2)
03.06 01:43:00 [Server] ERROR ------------------------------
03.06 01:43:00 [Server] ERROR Server thread dump (Look for plugins here before reporting to Spigot!):
03.06 01:43:00 [Server] ERROR ------------------------------
03.06 01:43:00 [Server] ERROR Current Thread: Server thread
03.06 01:43:00 [Server] ERROR PID: 15 | Suspended: false | Native: false | State: RUNNABLE
03.06 01:43:00 [Server] ERROR Stack:
03.06 01:43:00 [Server] ERROR com.matsg.zombies.game.Game.getActivePlayers(Game.java:135)
03.06 01:43:00 [Server] ERROR com.matsg.zombies.game.Game.getNearestPlayer(Game.java:185)
03.06 01:43:00 [Server] ERROR com.matsg.zombies.game.WaveManager$1$1.run(WaveManager.java:141)
03.06 01:43:00 [Server] ERROR org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71)
03.06 01:43:00 [Server] ERROR org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:353)
03.06 01:43:00 [Server] ERROR net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:738)
03.06 01:43:00 [Server] ERROR net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399)
03.06 01:43:00 [Server] ERROR net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678)
03.06 01:43:00 [Server] ERROR net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576)
03.06 01:43:00 [Server] ERROR java.lang.Thread.run(Thread.java:748)
03.06 01:43:00 [Server] ERROR ------------------------------
03.06 01:43:00 [Server] ERROR Entire Thread Dump:
03.06 01:43:00 [Server] ERROR ------------------------------
03.06 01:43:00 [Server] ERROR Current Thread: Craft Scheduler Thread - 22
03.06 01:43:00 [Server] ERROR PID: 120 | Suspended: false | Native: false | State: TIMED_WAITING
03.06 01:43:00 [Server] ERROR Stack:
03.06 01:43:00 [Server] ERROR java.lang.Thread.sleep(Native Method)
03.06 01:43:00 [Server] ERROR com.boydti.fawe.database.RollbackDatabase$1.run(RollbackDatabase.java:79)
03.06 01:43:00 [Server] ERROR org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71)
03.06 01:43:00 [Server] ERROR org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52)