I don't know how to describe my issue. But.. I try.

 

The client connection seems slow / not receiving some packets / stuck at some packets.

 

I mean the following:

1. If I type "f" in chat, the server immediately receives it, but the same client that type it in takes ~2-3 Minutes to display (sometimes it doesn't do it at all.)

2. Some entities are moving, some are stuck staying in one place.

3. TPS is fine. TPS is in the overworld at 20.

4. Server ping to my client is ~100ms.

 

Example:

 

Log doesn't help in this case..

http://pastebin.com/6Ydt6HuX (last 922 lines)

 

If I disconnect I'll get something like (spamming on the server):

[04:14:17] [Netty IO #11/ERROR] [FML]: NetworkDispatcher exception

java.io.IOException: An existing connection was forcibly closed by the remote ho

st

        at sun.nio.ch.SocketDispatcher.writev0(Native Method) ~[?:1.8.0_66]

        at sun.nio.ch.SocketDispatcher.writev(Unknown Source) ~[?:1.8.0_66]

        at sun.nio.ch.IOUtil.write(Unknown Source) ~[?:1.8.0_66]

        at sun.nio.ch.SocketChannelImpl.write(Unknown Source) ~[?:1.8.0_66]

        at io.netty.channel.socket.nio.NioSocketChannel.doWrite(NioSocketChannel

.java:249) ~[NioSocketChannel.class:?]

        at io.netty.channel.AbstractChannel$AbstractUnsafe.flush0(AbstractChanne

l.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.jav

a:488) [NioEventLoop.class:?]

        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEve

ntLoop.java:447) [NioEventLoop.class:?]

        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:341) [NioEven

tLoop.class:?]

        at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThread

EventExecutor.java:101) [singleThreadEventExecutor$2.class:?]

        at java.lang.Thread.run(Unknown Source) [?:1.8.0_66]

You mean without mods installed? I honestly don't know. I didn't tried that yet. I was suspecting forge tbh.

Okay I tested it with just Forge. It's not as bad as with my ~170 mods. But still losing some packets sometimes....

 

It does NOT happen local. (Server on local & client on local).

It sounds like, but it isn't. Because why should the server receive the message INSTANTLY, but the client not?

 

Also the ping to the server says 80ms. Which isn't bad considering the client is in germany and the server in the us.

 

"Some entities are moving, some are stuck staying in one place." <-- This is also a proof that a bad connection is not the case. If I had a bad connection all entities would be stuck. Not just a few.

 

It has to be some kind of problem with the MC Server. Because If I "do stuff" like breaking blocks, die etc. and then disconnect, the console spams Netty packet errors.

 

[04:14:17] [Netty IO #11/ERROR] [FML]: NetworkDispatcher exception

java.io.IOException: An existing connection was forcibly closed by the remote ho

st

<-- This. So the server is queuing all packets up, and when I disconnect it cancels the packets.

 

EDIT:

Also I was stupid. I've removed all mods and started the wrong server before. With no mods. I have no problem whatsoever. So not a forge problem. Guess that means disabling mods until it doesn't happen anymore.

 

EDIT2:

It doesn't happen with other big modpacks, such as Direwolf20, FTB Infinity.

I narrowed it down to opencomputers. Whenever opencomputers is installed it does that.