服务器无缘无故 出现以下代码 在后台刷屏  求大家帮我分析一下 到底哪里出问题了
[08:28:07] [pool-7-thread-1/INFO]: GroupManager - INFO -  Data files refreshed.
[08:28:07] [Async Chat Thread - #0/INFO]: [Lv.379]♂ 已婚 [主城世界]<[◎至死不渝◎]lidnog> 我去刷法老了
[08:28:08] [Server thread/INFO]: 5896s issued server command: /tpa WoWu
[08:28:09] [Craft Scheduler Thread - 559/WARN]: Exception in thread "Craft Scheduler Thread - 559"
[08:28:09] [Craft Scheduler Thread - 559/WARN]: org.apache.commons.lang.UnhandledException: Plugin MythicMobs v2.4.5 generated an exception while executing task 8276742
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
        at java.lang.String.replace(Unknown Source)
        at net.elseland.xikage.MythicMobs.Skills.SkillString.parseMobVariables(SkillString.java:54)
        at net.elseland.xikage.MythicMobs.Skills.Mechanics.SendActionMessageSkill.castAtEntity(SendActionMessageSkill.java:39)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.executeTargetedEntityTriggerSkill(SkillMechanic.java:390)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.executeSkills(SkillMechanic.java:313)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.execute(SkillMechanic.java:183)
        at net.elseland.xikage.MythicMobs.Skills.MetaSkill.execute(MetaSkill.java:108)
        at net.elseland.xikage.MythicMobs.Skills.MetaSkill.execute(MetaSkill.java:85)
        at net.elseland.xikage.MythicMobs.Skills.Mechanics.SkillSkill.cast(SkillSkill.java:60)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.executeMetaSkill(SkillMechanic.java:407)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.executeSkills(SkillMechanic.java:248)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.execute(SkillMechanic.java:183)
        at net.elseland.xikage.MythicMobs.Mobs.MythicMob.executeSkills(MythicMob.java:847)
        at net.elseland.xikage.MythicMobs.Skills.QueuedSkill.run(QueuedSkill.java:41)
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71)
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
        ... 3 more

[08:28:09] [Server thread/INFO]: lidnog issued server command: /cc open 菜单
[08:28:11] [Craft Scheduler Thread - 299/WARN]: Exception in thread "Craft Scheduler Thread - 299"
[08:28:11] [Craft Scheduler Thread - 299/WARN]: org.apache.commons.lang.UnhandledException: Plugin MythicMobs v2.4.5 generated an exception while executing task 8294303
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
        at java.lang.String.replace(Unknown Source)
        at net.elseland.xikage.MythicMobs.Skills.SkillString.parseMobVariables(SkillString.java:54)
        at net.elseland.xikage.MythicMobs.Skills.Mechanics.SendActionMessageSkill.castAtEntity(SendActionMessageSkill.java:39)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.executeTargetedEntityTriggerSkill(SkillMechanic.java:390)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.executeSkills(SkillMechanic.java:313)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.execute(SkillMechanic.java:183)
        at net.elseland.xikage.MythicMobs.Skills.MetaSkill.execute(MetaSkill.java:108)
        at net.elseland.xikage.MythicMobs.Skills.MetaSkill.execute(MetaSkill.java:85)
        at net.elseland.xikage.MythicMobs.Skills.Mechanics.SkillSkill.cast(SkillSkill.java:60)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.executeMetaSkill(SkillMechanic.java:407)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.executeSkills(SkillMechanic.java:248)
        at net.elseland.xikage.MythicMobs.Skills.SkillMechanic.execute(SkillMechanic.java:183)
        at net.elseland.xikage.MythicMobs.Mobs.MythicMob.executeSkills(MythicMob.java:847)
        at net.elseland.xikage.MythicMobs.Skills.QueuedSkill.run(QueuedSkill.java:41)
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71)
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
        ... 3 more

[08:28:11] [Server thread/INFO]: Da___Bai issued server command: /cc open 菜单

自定义怪物插件不兼容，更新一下版本即可。

好的我试试去