forge server crash caused by entities

[Ewe Loon]

build,  forge_1.13.0.1180 server running on ubuntu

 

 

if there are too many (less than 300) entities

and a cleien with a slow internet connection trys to connect

this error occurs about 200 times per second, flooding memory and causing so much lag that even the console is almost unresponsive

 

[16:02:02] [Netty IO #2/ERROR] [FML/]: NetworkDispatcher exception
java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcher.writev0(Native Method) ~[?:1.6.0_24]
at sun.nio.ch.SocketDispatcher.writev(SocketDispatcher.java:51) ~[?:1.6.0_24]
at sun.nio.ch.IOUtil.write(IOUtil.java:182) ~[?:1.6.0_24]
at sun.nio.ch.SocketChannelImpl.write0(SocketChannelImpl.java:383) ~[?:1.6.0_24]
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:406) ~[?:1.6.0_24]
at io.netty.channel.socket.nio.NioSocketChannel.doWrite(NioSocketChannel.java:249) ~[NioSocketChannel.class:?]
at io.netty.channel.AbstractChannel$AbstractUnsafe.flush0(AbstractChannel.java:680) [AbstractChannel$AbstractUnsafe.class:?]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.forceFlush(AbstractNioChannel.java:266) [AbstractNioChannel$AbstractNioUnsafe.class:?]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:488) [NioEventLoop.class:?]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:447) [NioEventLoop.class:?]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:341) [NioEventLoop.class:?]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101) [singleThreadEventExecutor$2.class:?]
at java.lang.Thread.run(Thread.java:679) [?:1.6.0_24]
[16:02:02] [Netty IO #2/ERROR] [FML/]: NetworkDispatcher exception
java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcher.writev0(Native Method) ~[?:1.6.0_24]
at sun.nio.ch.SocketDispatcher.writev(SocketDispatcher.java:51) ~[?:1.6.0_24]
at sun.nio.ch.IOUtil.write(IOUtil.java:182) ~[?:1.6.0_24]
at sun.nio.ch.SocketChannelImpl.write0(SocketChannelImpl.java:383) ~[?:1.6.0_24]
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:406) ~[?:1.6.0_24]
at io.netty.channel.socket.nio.NioSocketChannel.doWrite(NioSocketChannel.java:249) ~[NioSocketChannel.class:?]
at io.netty.channel.AbstractChannel$AbstractUnsafe.flush0(AbstractChannel.java:680) [AbstractChannel$AbstractUnsafe.class:?]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.forceFlush(AbstractNioChannel.java:266) [AbstractNioChannel$AbstractNioUnsafe.class:?]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:488) [NioEventLoop.class:?]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:447) [NioEventLoop.class:?]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:341) [NioEventLoop.class:?]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101) [singleThreadEventExecutor$2.class:?]
at java.lang.Thread.run(Thread.java:679) [?:1.6.0_24]
[16:02:02] [Netty IO #2/ERROR] [FML/]: NetworkDispatcher exception

 

this was tested on a server with clients having no mods

 

Note. connecting from lan has no problem

 

just tested with latest recommended build forge server 1.13.2.1230 

problem still occurs though error messages didnot appear on the console

however the errors are still in logs\fml-server-latest.log

 

[LexManos]

How do you know this is caused by entities.

This is caused by the client having bad internet and disconnecting.

[Ewe Loon]

entities do cause it, but might not be the only thing that can

 

I spawned lots of entities (chickens) and the crash occurred every time,

killed them off, no crashes

spawned lots of cows , and got crashes again

It will be something to do with the network traffic they are causing

 

 

[LexManos]

Well they are obviously going to cause a larger amount of traffic then if there were none there.

Which would exacerbate the problem of having a bad connection.