Problem/Bug 1.8 server crash

Hi!
My server keeps crashing after a player logs on. Here is the log: [removed] http://hastebin.com/eyeqonesis.vhdl
Is there a fix for this?
Thanks!

 

Nevermind! According to http://www.minecraftforum.net/forums/support/server-support/2578436-server-killed, this is just because OOM killer is trying to free up memory
OLD POST:

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I removed Essentials XMPP, but this still happens a few seconds after I join the server. However, Essentials vTeamCity is no longer throwing an error.

LetItRain seems to also be crashing. The server just generated a crash log:

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Code:

---- Minecraft Crash Report ----                                                                                                                                       
// My bad.                                                                                                                                                             

Time: 6/20/16 3:51 PM                                                                                                                                                  
Description: Watching Server

java.lang.Error                                                                                                                                                        
        at java.net.SocketInputStream.socketRead0(Native Method)                                                                                                       
        at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)                                                                                           
        at java.net.SocketInputStream.read(SocketInputStream.java:170)                                                                                                 
        at java.net.SocketInputStream.read(SocketInputStream.java:141)                                                                                                 
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)                                                                                              
        at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:345)                                                                                              
        at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:704)                                                                                            
        at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:647)                                                                                                  
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1536)                                                                    
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)                                                                     
        at me.legault.LetItRain.Metrics.postPlugin(Metrics.java:451)                                                                                                   
        at me.legault.LetItRain.Metrics.access$500(Metrics.java:98)                                                                                                    
        at me.legault.LetItRain.Metrics$1.run(Metrics.java:285)                                                                                                        
        at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java:53)                                                                                   
        at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:349)                                                        
        at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:653)                                                                                    
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:284)                                                                                    
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:598)                                                                                    
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:506)                                                                                  
        at java.lang.Thread.run(Thread.java:745) 

This only happened once.