Well - Few hours in that was not the source of the issue - Will continue to troubleshoot and will update once a confirmed source to this issue is found (If it can be found on the client/host and not in the actual code) Unfortunately I am not deeply versed in JAVA - Thanks

Can someone confirm this happens with an online-mode=true, vanilla server?

All defaults in place for Vanilla server. Confirmed that this is Online-mode=True

I don't want to Jinx it - but this appears to be an issue with Windows updates! After working with my buddy on his box where we are hosting this, it was found that there were several "Optional" updates available. He had recently put a fresh install of Win7 prior to adding the server to that box back in Jan, and while he did the windows updates...there were several optional ones clearly overlooked and/or he just didn't verify all were complete after each restart.

After completing this, it has been 24 hours without an error... I have also kept my character logged in now for 10 hours straight... jump in and play some, but have allowed it to hang out in a corner and have yet to lose connection. I do not have an exact update as he just selected to install all updates+optional. Alex, Matthew, Sean etc... can you check (If you are the server host or have a direct connection with the host) if there are updates available. My guess is there were some .net framework updates... but again I don't have a list. After you check, can you confirm that there are updates available... and if after updating that it corrects it.

I will update again tomorrow - allowing the character to stay in 24 hours straight before I completely am sold. The error was occuring within a couple hours (Usually the first 30 min) so, so far this has been the most successful change....

Resolved as invalid for now. Please comment if this issue is still present.

I have this problem in Minecraft 1.7.9 on Windows 8 with the latest Java version..
I try to connect to a server. I log in, but then, after a few seconds, there appears a message like in the title of this report and it disconnects me.
perhaps my english isn't 100% correct

I have this exact problem and have had it for months now with no fix to be found.

It is your PC/SERVER - we took the server files (No alterations) and migrated to a new box. The error has completely gone away - anyone having this issue should address the box they are working on - it is a setting within the computer that MC/JIRA will have no control over - could be anything from a win update, Java install/path(Location) to anti-virus program... after months of trouble shooting to no positive source, we have thrown out the other box even though it was much bigger as there was an issue in the win7 environment that was not accepting the newest MC server updates and/or allowing them to be played.

So suggestion, ask someone else to host with the same exact files and you will find that it runs like a champ again! Sad but true....

I appear to be having this same issue, the weird thing is, It was working perfectly fine yesterday, no issues ran perfectly smoothly, but when I try it today it will not work. As far as I know when I shut down my machine yesterday there was no updates queued up and waiting to be installed so I will be ruling out that. The other weird thing is that i'm playing using Minecraft version 1.7.5...from what I see above it seems that other people are using a new version and having the same issue, so I think it is a long standing dormant bug that awakens at some points due to some system change or something. I don't know, I am far from a technical annalist.

Started having this issue today. No windows updates were installed since yesterday (Win8, 64). Can't stay in a server for more than about 15 seconds and cannot interact with chests and pressure plates. Can I do anything or is this server-side? What's this "resolved as invalid"? Is there no support for this issue?

I dont think this is specific to a person's PC at all.

I just started having this issue recently on a Mojang Realms run server. I do not have the issue happen on any of the other Realms they operate that I log into. Just one of them. That to me makes me suspect a bug or something about their server. I tried updating Java. I allow Minecraft and Java through the firewall. I have been playing on my friends Realm for hours today no issue after being booted repeatedly with the above Java Exception immediately prior multiple times on another Mojang Realm. I think this is clearly an issue they need to reopen. I have been looking at forums all day. Do the owners of Realms even have access to timeout commands?

and for clarity I was mid actions when I was booted like chopping down trees.

Still getting this problem with idle timeout=0. Happens randomly and not very often but can keep me from playing for as long as two days, both in snapshots and 1.7.4. Problems are as everybody else stated: log in for 10-20 seconds, can't interact with chests and pressure plates, for instance, then disconnect.

I have this problem in 1.7.10, but not on my server.

I have the same problem. https://bugs.mojang.com/browse/MC-72222

This is an issue for me in all versions and even when I switched accounts. I cannot join servers or LAN at all. This issue is also exclusive to one computer on my house hold. EDIT: Still an issue in 1.8.1

I've just noticed that this is a java.io.IOException, and every time I start up my server I get the following error:

[10:55:10] [Server thread/INFO]: Starting minecraft server version 1.8
[10:55:10] [Server thread/INFO]: Loading properties
[10:55:10] [Server console handler/ERROR]: Exception handling console input
java.io.IOException: The handle is invalid
at java.io.FileInputStream.readBytes(Native Method) ~[?:1.8.0_25]
at java.io.FileInputStream.read(Unknown Source) ~[?:1.8.0_25]
at java.io.BufferedInputStream.read1(Unknown Source) ~[?:1.8.0_25]
at java.io.BufferedInputStream.read(Unknown Source) ~[?:1.8.0_25]
at sun.nio.cs.StreamDecoder.readBytes(Unknown Source) ~[?:1.8.0_25]
at sun.nio.cs.StreamDecoder.implRead(Unknown Source) ~[?:1.8.0_25]
at sun.nio.cs.StreamDecoder.read(Unknown Source) ~[?:1.8.0_25]
at java.io.InputStreamReader.read(Unknown Source) ~[?:1.8.0_25]
at java.io.BufferedReader.fill(Unknown Source) ~[?:1.8.0_25]
at java.io.BufferedReader.readLine(Unknown Source) ~[?:1.8.0_25]
at java.io.BufferedReader.readLine(Unknown Source) ~[?:1.8.0_25]
at pq.run(SourceFile:80) [minecraft_server.1.8.exe:?]
[10:55:10] [Server thread/INFO]: Default game type: SURVIVAL
[10:55:10] [Server thread/INFO]: Generating keypair
[10:55:10] [Server thread/INFO]: Starting Minecraft server on *:25565
[10:55:11] [Server thread/INFO]: Preparing level "Block Land"
[10:55:11] [Server thread/INFO]: Preparing start region for level 0
[10:55:13] [Server thread/INFO]: Preparing spawn area: 2%
[10:55:14] [Server thread/INFO]: Preparing spawn area: 36%
[10:55:15] [Server thread/INFO]: Preparing spawn area: 86%
[10:55:15] [Server thread/INFO]: Done (4.469s)! For help, type "help" or "?"

This error seems to cause no problems, but if everyone having the "java.io.IOException: An existing connection was forcibly closed by the remote host" error is also having the invalid handle error, maybe there's something connected. Does anyone know if these errors are related?

I know nothing about java or technical aspects of computers, but this has been an annoying issue. It periodically disconnects everyone (except me) from the server I'm running. It happens whether or not I'm playing on the server too. Sometimes it happens every 2 minutes, and other times it runs fine for an hour or more. I'm using Windows 8.1, have the latest java updates and no old versions of java installed, and I am running a vanilla server 1.8.1 with onlinemode=true.

@Alex Darlow, the issue in your log is MC-33041, which has nothing to do with connection issues.

My bad, thanks! Hopefully something else will be figured out about this issue then.

This randomly started happening to me a few days ago. I try to join this server i play on all the time. All of a sudden the ping goes up over 1000 and i get that error message after about 10-30seconds of not being able to do anything. This keeps happening to me over and over and idk why it's happening. Sometimes i also just get the message Disconnected or the message that is something like io.netty.handler.timeout.readtimeoutexception. None of this has ever happened out of my years of playing Minecraft and this server until just a few days ago on 1.8.1 pls help

I am having this issue right after creating a server. Is there a fix for it?

I run a Minecraft Vanilla Hardcore server since 2013, but since around January, February 2015 I have this problem.

-I tried running the vanilla .exe server on a (Windows 7 x64) and (Windows 8.1 x64).

-I also tried running the vanilla .jar server on a (Windows 7 x64) and (Windows 8.1 x64), with (jre7), (jre1.8.0_25), (jre1.8.0_51).

-I have forwarded my TCP and UDP port 25565 on my server.

It work and have not the message when i reach 127.0.0.1;
But... I have the problem when I try to reach it from outside the server, even inside my network.

In the multiplayer lobby it's written: "Can't connect to server". But when I click on the link, it reach a connection, but then crash by displaying the message: "Internal exception: java.io.IOException: An existing connection was forcibly closed by the remote host." and then game never start.

Can't wait for a fix or solution.

"Please help me Mojang-wan, you're my only hope."

Yeah this bug used to happen to me a while back and now its affecting my multiplayer servers again! Whenever I join a multiplayer server I get kicked about 30 seconds later, just when every player in the lobby freezes, but I can still move. Pls Help. I think the bug was fixed a week later when it was reopened last time. ;(

Yay! The bug has fixed itself.... (for me 😛).... after 3 days of boring singleplayer.

I get this error on a Minecraft Realms server. Just signed up today. If I stay in one spot, it will be fine. If I move around, I get the error every minute.

A bunch of players on my realm have informed me they are all getting this issue and cannot connect

This is also happening alot on a realm I play on. Ive noticed it happening alot when interacting with things like chests. Also being in the most "populated" area of the realms seems a bit like its also making it happen more often, I cant confirm that well tho.

I have 1.8 and I am getting this problem I have updated java reinstalled minecraft everything it wont go away plz help

I just came across a Reddit thread that claims you can fix this issue by disabling NAT acceleration in your router settings. It would be useful if someone who is experiencing this issue could try that.

I get this error message when I try to connect to me friends server, i've tried allowing the connection with my firewall by adding the UDP and TCP rule to it....nothing and I've updated Java as well. Still the same: can't connect to server issue - any solutions available? I'm going to try the NAT thing. Also, it's my friend running the server and other people have no issues connecting :/

I am still having this issue on my 1.7.10 forge client I try to log in and it kicks me.

This happens with my realm aswell. I was testing my minigame with my friend yesterday, we were running around all the time, and suddenly BOTH get kicked at the same time.

It happens pretty frequently, and it really is annoying. And, it breaks the system because you do not get the "stat.Leavegame" score when you get disconnected like that.

My IGN is neropatti, if it is anything realm specific.

This has been happening to me on LAN worlds hosted by my roommate for all releases of 1.9. I'll be able to play steadily for a good while, then I get kicked with the error message. I can rejoin, but the problem gets more and more frequent until I'm unable to play at all. Wait a few days, it starts all over. This makes no sense to me...

FIX FOUND! https://www.reddit.com/r/Minecraft/comments/432m1f/fix_for_internal_exception_javaioioexception_an/

I had this error with minecraft server using my new modem and after googling around for couple of hours it seemed that hundreds of people have been experiencing the same. However, couple of days later someone answered in asus vip forum and suggested to:

• disable NAT acceleration in my router settings (found in LAN > Switch Control)
  and it fixed all the problems i was experiencing with minecraft server. So good to know it didn't have anything to do with minecraft or Java. The error kicked you out after 15seconds saying this: "internal exception: java.io.ioexception: an existing connection was forcibly closed by remote host"
  Also here for more explanations: http://routerguide.net/nat-acceleration-on-or-off/
  other routers:

• "NAT acceleration is a feature that is available on Asus branded routers. It is also known as hardware acceleration in some cases by other branded routers. It can also be named as CTF (Cut-Through Forwarding) and FA (Flow Accelerator)."

• also here about minecraft: "Port Forwarding Not Compatible: NAT Acceleration is reported to not be compatible with port forwarding feature. This means that when you have the NAT Acceleration, you will typically unable to host gaming sessions from your home. So you will not be able to host any game servers such as Minecraft, MMO, or First person shooters since players will not be able to connect to it."

confirmed in 16w20a

Is this still an issue in the most recent versions (currently that is 1.10.2, or 16w43a) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.

Yes, this is still an issue. Trying to join my friends server, worked perfectly the last two days but then today I've been getting this message first every few minutes and then as soon as I join the server again.

Edit: Version 1.10.2

Originally trying to connect to my server would give me

(java.net.ConnectException: Connection refused: no further information: )

This is the same output that an offline or non-existent server would give. After I did a port forwarding for port 25565, the error message as soon as I try to connect is now

(Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host)

So, now my computer can reach the server thanks to port forwarding, but it is denied access.
I have whitelist off, and most of my other server properties are default.
Also, it does say (Logging in...) just before the error message is displayed.

Try switching from the Exe client to the Jar client. Make sure you have the latest Java installed too. The Exe client uses an extremely outdated Java version (8u25) which is known to cause poor performance in the client during loading screens. This bug sounds like you guys are getting timed out/kicked for taking too long to log in.

Update - I found a fix for me! I've been able to play for several hours and log on several times.

It's related to BillyGalbreath's comment above.

I run an exe minecraft launcher - this is the one you get off the official site (and the one that's up-to-date, supposedly.) The problem is not in the launcher, but as he said - the version of java the launcher uses. It refers to a really old version and I suspect the launcher installs this version (instead of using your later, up-to-date version).

The bug itself appears to be a JAVA bug - not a bug with minecraft, and so the fix (I believe) is to either:
a) Use a .JAR minecraft launcher
b) Force the .exe launcher to use your version of JAVA.

If you use an .exe minecraft launcher and you have this bug, try this:

1. Download the latest version of Java from their website
2. Go to your program files folder (by default, it should be C:\Program Files (x86)\Java\ )
3. Find the folder of the latest version you installed, and copy it's location to your clipboard
2. Open up your minecraft .exe launcher
3. Click "Edit Profile" (or edit the profile of the one you want to fix)
4. Under "Java Settings (Advanced)", check "executable" to enable you to edit it
5. Replace the beginning of the file path (up to bin) - it will look something like this C:\Program Files\Java\jre1.8.0_111\bin\javaw.exe
6. Hit "Save Profile".

Worked for me as normal after this.

If that doesn't work, try downloading the .JAR launcher as BillyGalbreath suggests - you can get it from minecraft.net - once you've logged in, hit "Download", "Download the Game", and then on the right, under "Download Minecraft for Windows", click on "Try an Alternative Download" and there will be a link to the JAR launcher there.

• When I rebooted the launcher I noticed it kept trying to use the old version - so try restarting your machine if you get this too.

• I use the steam launcher to integrate minecraft with steam and noticed this happening again, when I removed the shortcut and re-added it, I solved the issue.

Note for developers/ Mods

To try and reproduce:

• Have the latest .exe launcher installed on windows, check the 'executable' path and make sure it has an old version of java (Java 8 build 25 was what I had)

• Log into an official realm

• You should be disconnected after 30 seconds with the JavaIOException listed in this ticket.

I presume a fix for this issue is to ensure the .exe launcher uses a later version of java by default, (1.8.0_111 worked ok for me using the latest version).

The JAR launcher doesn't appear to have this issue.

Hope this helps somebody!

@Sam P

Thank you so much for this answer. After a week of troubleshooting this, your response finally worked.

FYI, I had to do the second option: find the old/legacy JAR launcher and use that. https://minecraft.net/en-us/download/alternative I used the second option on this page.

Recently bought Realms and I can play for about 30 seconds until all mobs/players freeze and blocks don't drop anything. Then I get the error in the OP. After reconnecting a bunch of times I was able to actually play last night but that doesn't seem to be happening today. Version 1.12

Edit: It works for now, but wasn't ~3-4 hours ago (~3-4pm AEST).

I've tried everything you said and the error still appears. This is getting too annoying.
My friends can enter the realm without problems...

I bought the game yesterday, entered the realm with my friends and after 30 seconds the connection closes
I have tried what they say in the other comments, and it has not worked for me.
My friennds can enter the realm without problems...

Hello,
I tried everything but nothing worked.
It is really annoying because most of the lags happen each 5 minutes...
Can anyone help me ?

I play minecraft on an ASUS Vivo Pro (PC)

Same issue when upgraded to 1.12.2. Problem disappears if revert to 1.12.1.

The "forcibly closed by the remote host" popup is displayed 30 seconds after connecting to server, this period beginning after "Loading terrain" finishes.

I tried:

• connecting with a second computer, with no success

• changing to old Java launcher, as suggested by @Sam P, with no success

• overriding the Java version, instead of the bundled version, but that made no success

• disable NAT acceleration, as suggested by @demonishh, with no success

• checking server log (only shows "lost connection: Disconnected")

• checking client log, including info and debug messages (only shows "Connecting" then "Loaded 382 advancements" after 20 seconds, at the same time that “Loading Textures” finishes being displayed and the 30 second period begins)

• revert to previous version (1.12.1), with success

It feels like a server-initiated "keep alive" packet is not responded to by my client, within the 30 second period described in "Keep Alive (clientbound)" section at http://wiki.vg/Protocol#Keep_Alive_.28clientbound.29.

I'll be interested to see if the problem still exists for version 1.12.3.

I'll also take the computer to work, next week, to see if the different environment makes any difference.

Are there any other things that can be checked?

PS, another user on the same server had no connection problems. 😞

Hello I have the same exact problem, and none of the servers 1.12.2 work for me, only for 30 seconds of no interaction, and rendered chunks, then I get kicked for this error message.

My guess is that it has something to do with the router, everything else that I tried does not work.

EDIT: seems to be the case, it is the internet. I switched to 2.4 from 5.0 and i dont get the problem any more. It has something to do with the internet.

Hello, I run a server, and I'm having the same problem in version 1.12.2. As mentioned before, this seems to be due to a change in the protocol with the keep-alive packet. Some players on my server will get disconnected due to the java.io.IOException error a few seconds after connecting, and the problem persists if they continue to try logging in. This problem affected me as well, until I switched to using a VPN to connect to my server. I'm using windows 8, connecting using ethernet cable. When it isn't keeping players from logging on, it is drastically raising ping, ranging from a ~10ms average increase to ~100ms, which can spike up to 1000ms increase in ping at times... Incredible amounts of latency, although the server is hosted in a datacenter with a 100 mbps uplink connection.

This is very devastating and I cannot play any of my favorite servers and have no means of playing mc. Sometimes it works for about an hour and then the problem starts again. Someone please help solve this issue.

I am also experiencing this issue. I updated to 1.12.2 and now I cannot connect to my own bungee servers at all. I might have to roll back to 1.12.1 if this isnt fixed soon...

I am having the same issue. I was able to log in earlier today after 2 java errors and play for about 2 hours. Then I got kicked just as someone joined the realm I was in. Now I get the "Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host" error every single time I try to log on. The terrain will only partially render, and neither my avatar nor skills/tool/health bar show up. Then I'm disconnected. This is incredibly frustrating as I have friends who can still play in this realm. I am playing on version 1.12.2 with ethernet cord (not wifi) router. Please help! Thanks

I have noticed this is happening to me every single day on a certain time range, in my case usually around 7 PM to 11 PM. It kicks me from all servers after letting me join and render out people who stand still. Some servers kick me instantly, while others I can play for 5 minutes before getting kicked, depending on how good their host is.
This is definitely a problem with my internet or router, but I cannot figure it out, I have tried absolutely everything I could think of, and if anyone has ANY suggestions, I would be very grateful in a step forward to solving this.

I rolled back to 1.12 and it worked last night, but now once again, It doesn't work. A large amount of my users are also not able to join, I might have to roll back to 1.11

Also unable to connect to server since updating to 1.12.2...shifting back to 1.12 seemed to help for a short while but there are still issues for many users. Rolling back to 1.11 will be our only possible solution atm until a better one is supplied.

having this happen on realm i play on, at most we have 3 people on at a given time.

I was having the same problem with a vanilla server version 1.12.2 (online-mode=true), my friend joined the server but after few seconds he was disconnected, this happened every time he tried to join. I rolled back to 1.12 and that way it works fine without disconnecting. Previously (before the version 1.12.2) we never experienced any problem.
PS: I also tried snapshot preview 17w43b but he had the same disconnection problem.

I'm having the same problem in version 1.12.2 when I try to connect to Realms. The problem is intermittent and only seems to happen to me (3-5 people play on my Realms server). For the 10-20 seconds that I am logged into realms, I can move around but I can't interact with any blocks. The world seems to run on, only my actions aren't processed (for example, I will log in, wait 20 seconds, get booted, log back in, and be killed by a hostile mob, then booted again).

Meep Games I've just checked the solution that you've suggested; unfortunately it doesn't work. The problem still remains.

Meep Games I have also tried the solution and it doesn't work, even with both public and local enabled.

Umm...... have you checked you 'remot host' aka router/internet 95.99% of the time it just bad/crowded internet connections(However i have on a 1.01% basis found it was a slight bug in that specific version, and 3% of the time its mojang's servers down for maintenance but it just showed the wrong message) but yeah All most any time you see that massage its something to do with your Router.

I think that in my case the problem is not the router, because Minecraft 1.12 works without problems, although Minecraft 1.12.2 doesn't work. Something must have changed in this new version.

I was on a server with 2 different accounts with 2 minecraft windows. 1 account crashed to this problem and the other account I could play on perfectly fine. I could not play the server with the one that crashed with the same error after many tries. After I disconnected with the working account, it wouldn't let me play on that one either. This is a very odd problem and I still question whether it is due to router problems or based on client or server side.

Same problem here. I’m unable to connect to home server since it was updated to 1.12.2. No problem with 1.12.1. Same problem with last snapshot (17w47b). I believe (as @paul williams said) that the problem is the change in Minecraft server protocol in 1.12.2 [Changed parameters in Keep Alive (clientbound - 0x1F) and Keep Alive (serverbound - 0x0B) from VarInts to longs.]. I think that in some particular circumstances (bad internet connection for example) this change in Keep Alive protocol causes disconnection. It’s a big annoying problem, since I can’t play online anymore with last stable release. Sorry for my bad english.

I may have found what causes this. Web Filters, all settings and server configuration is correct, tried it on a network and it didn't work, I tried running a VPN on the same network and it worked. I also tried a different internet connection and it worked. Basically what I believe the issue is, its some sort of web filter on an internet connection.

MeepGames, I don't know if you are being serious or not, but that isn't even close to related to this issue. Browser data would not effect your minecraft client.

My friend and I have this issue, I've found that my friend has no problem joining and playing on my server until I join, then once I join his game has that error and can not rejoin even if I leave the game he justs get stuck at downloading terrain. The error has something to do with the world file because if I delete the world folder he can join again but gets the error again once I join. I hope this helps and I'll do more research and try to find the file that causes it.

Update: It doesn't matter if he runs the server or if I run the server the error happens. (To me if it's his server and to him, if it's my server.)

On my issue I cannot connect to a particular server (skrafty.minecraft.com) and it worked good for 2 days and then boom the thing became awful again. This time it literally won't let me connect (LAst time I would occasionally get on) and either said Timed Out, Disconnected, or the java.io.ioexception.

Had this issue until today, when the guy who's hosting my server files for me suggested taking out the server resource pack. Did that, then didn't get kicked with an io exception until a little while after I logged in. break in writing comment as I double check the length of time Ok, looks like it was ~9 minutes, where beforehand it was 5 seconds, if that. Sometimes I wouldn't even get the update spam for some of my plugins before it kicked me. This ONLY happened once I tried to apply the resource pack from ingame only.

THIS IS THE FIX:

didn`t work for me and i tried disabling NAT and nothing. Is there another fix ?

I think you are not doing nothing for this. more than 3 years with this issue. are u studying at least this? I am doing all that i can for this, and i dont think is an internet problem, but u have to study every example, for example i moved to another country and i used to play normally before, and my new internet is better than the older one and i have the same laptop, and if the problem is not just with the older versions there is something else that has to do... and we are in 2018 and the problem started for me about 3 months ago (november-2017)

Just happened to me on a server on my LAN.
Happens using both the global IP addresses and the local 192.168.x.x addresses.
Happens when Windows Firewall is disabled serverside (and also when it's enabled).
I am able to connect to the server with no issues from a client on the same computer using localhost.
When I try to connect from a second computer, the message says that the connection was forcibly closed by the remote host (i.e. the server), but in the server console it simply says "Disconnected", which you normally just get when you log out. This happens both when a second account is already logged onto the server and when there's no-one else online. The second account never gets kicked.

@EarthComputer Can confirm all specific situations you tested produced the same results as mine.

OK. Using the bundled Java runtime and am able to connect to 1.12.2 without timeouts, at least so far. I'm sure I tried this before, but now it's working. The latest Java 8 is still an option, If it starts failing again.

I would be interested to hear if other people have success with this, or are still getting the "forcibly closed by the remote host" error.

Im running 1.12.2 Minecraft version and still having the same problem. I run a Minecraft server and want to play with 2 friends. But only two people can loggin in the server, when the third one try to log in after some seconds the following message appears "Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host".

I've already deactivated my anti-virus and firewall, but didnt work. Any help?

I read some of this topic and this bug is here since 2013... for godsake Mojang help us!

Whats is a "bundled Java runtime" and how I get it?

I have this on 1.13

yeah i have this on 1.13, only one person can join besides the host, anyone joining after that will get kicked.

Also my friend have this only with my server on 1.13.

Same problem here

Got this problem with the 1.13 update. I can only stay for a full minute before I get kicked out of a LAN world. Please fix this Mojang.

Started happening to me earlier today, very frustrating. Has any of you been able to connect to the servers you were getting kicked from since your post?

Happening for me only on versions of minecraft 1.12 and above. Made a detailed post here: https://bugs.mojang.com/plugins/servlet/mobile#issue/MC-135482
Don’t think that thread will be getting much help (much to my dismay, since the information here is pretty outdated and burried in the comments).
Hope this helps.

Same issue on 1.13.1 it has become unplayable. Disconnects randomly when i finally able to connect giving 1-20 mins of play time per session. Fix needed badly!   

I had the same issue and solved it (Dunno if it's temporary)

I went to the advanced settings as was suggested earlier and it was using Javaw.exe to launch minecraft, I changed it to Java.exe and it's now working smoothly (So far)

Experiencing the same issue right now with a clean version of minecraft 1.13.1. Tried with a clean version of minecraft, different accounts and two different computers; mac and windows.

I'm getting this exception myself when trying to connect to a friends server, it started yesterday and has continued into today, and before now I'd get it now and again randomly on 1.13.1. I've already tried the different suggested fixes to no success. 

Same problem here, can't connect to a specific server since a week, other servers work good though. (I'm staff and I really need to get back on!)

I've tried everything

Re-downloaded mc and java, allocated lots of ram (i got a lot), reset fire-wall/windows defender, got no Anti-Virus, tried VPN, tried different IP's of the server, tried using another account, tried putting render distance to 1, not using any resource packs/mods, deleted IG files, tried teleporting when joining and reset my network settings on PC. I also tried joining with 1.12.2

Nothing has worked, please fix this issue ASAP <3

Try to make Java in Firewall private.

How to make it private

Windows Firewall > Allow an app through Windows firewall > Click change settings > find Java(TM) Platform SE Binary in the list, uncheck 'Public', do them all. (some you cant uncheck, leave them)

Hope this helps to fix it, this worked for me few years ago 😛

I am now suddenly having this issue and it was working fine yesterday. tried the firewall thing that Oval suggested and it still didn't work, and I'm not computer/tech savvy so I don't want to do too much to my laptop and mess other things up on it, so I would like a definite 100% guarantee fix before doing anything else. Does anyone (mostly that works on/with Minecraft) know what's going on, how ot fix it, or is even looking into it?

Experiencing the same issue. Ever I connects to a server, after a while when I lagged a bit, then it kicked me with that reason. This seemed to have stayed for a long time, and not being fixed. Maybe the server software?

Also have the same issue. If a fix could be made it would be highly appreciated.

When I join my server (private, 1.13.1, spigot-based) it joins, encrypts, then loads terrain until it times out and disconnects. Never actually joins the game.

try assigning it more ram (random acces memory) that might solve your problem

didn't work I already tried that

I did think that someone said it to my problem so sorry

I have tried absolutely everything in this thread, nothing has worked thus far.

This issue still occurs on all minecraft versions.

I am certain it has something to do with the router, and could also be a minecraft bug that is fixable.

As far as I know, this occurs randomly, and I cannot find a correlation between anything that causes this issue. 

I have also been plagued by this error as well as everyone playing on my FTB Revelation server. I am at least able to play 10-15 minutes before it crashes but it's driving me nuts. 

Confirmed in 1.13.1 - Many problems in the last 4 days ... some people kicked random after 10-30 seconds.

this is happening to players on my self-hosted server, especially a certain world.

mabe this could help? someon crashed and it logged it on my console (ign: guccigang1) https://hastebin.com/uwonugucis.md

[06:24:04 INFO]: [+]GucciGang1
[06:24:05 WARN]: Couldn't look up profile properties for com.mojang.authlib.GameProfile@7e1d7271[id=dbf5ec5c-062a-4467-bc96-d0199daf4ef4,name=GucciGang1,properties={},legacy=false]
com.mojang.authlib.exceptions.AuthenticationException: The client has sent too many requests within a certain amount of time
at com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.makeRequest(YggdrasilAuthenticationService.java:79) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillGameProfile(YggdrasilMinecraftSessionService.java:180) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillProfileProperties(YggdrasilMinecraftSessionService.java:173) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.TileEntitySkull$1.load(TileEntitySkull.java:79) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.TileEntitySkull$1.load(TileEntitySkull.java:1) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3716) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2424) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2298) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2211) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.google.common.cache.LocalCache.get(LocalCache.java:4154) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4158) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5147) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:5153) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.TileEntitySkull$3.call(TileEntitySkull.java:206) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.TileEntitySkull$3.call(TileEntitySkull.java:1) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.TileEntitySkull.b(TileEntitySkull.java:222) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.craftbukkit.v1_12_R1.inventory.CraftMetaSkull.applyToItem(CraftMetaSkull.java:81) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.craftbukkit.v1_12_R1.inventory.CraftItemStack.setItemMeta(CraftItemStack.java:431) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.PacketDataSerializer.a(PacketDataSerializer.java:250) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.PacketPlayOutWindowItems.b(SourceFile:44) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.PacketEncoder.a(SourceFile:46) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.PacketEncoder.encode(SourceFile:15) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at sun.reflect.GeneratedMethodAccessor61.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_181]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_181]
at com.comphenix.protocol.reflect.accessors.DefaultMethodAccessor.invoke(DefaultMethodAccessor.java:16) ~[?:?]
at com.comphenix.protocol.injector.netty.ChannelInjector.encode(ChannelInjector.java:458) ~[?:?]
at com.comphenix.protocol.injector.netty.ChannelInjector.access$100(ChannelInjector.java:66) ~[?:?]
at com.comphenix.protocol.injector.netty.ChannelInjector$1.encode(ChannelInjector.java:232) ~[?:?]
at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.comphenix.protocol.injector.netty.ChannelInjector$1.write(ChannelInjector.java:238) ~[?:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:801) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:814) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:794) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:831) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1071) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:300) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.comphenix.protocol.injector.netty.ChannelProxy.writeAndFlush(ChannelProxy.java:327) ~[?:?]
at net.minecraft.server.v1_12_R1.NetworkManager$4.run(NetworkManager.java:200) ~[spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at com.comphenix.protocol.injector.netty.ChannelInjector$3.lambda$onMessageScheduled$1(ChannelInjector.java:310) ~[?:?]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) [spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404) [spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463) [spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) [spigot-1.12.2.jar:git-Spigot-dcd1643-e60fc34]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
[06:25:47 INFO]: GucciGang1 lost connection: Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host
[06:25:47 INFO]: [-]GucciGang1

Maybe this means something? Got the error and this is my server console: 

[02:04:53 INFO]: Pie3 lost connection: Timed out
[02:04:53 INFO]: [-]Pie3
[02:04:53 WARN]: handleDisconnection() called twice

[-] pie3 is custom log out message

Can we please get some professional help it has been 5 years and still this issue is among us.

Is there a way to look into the code or something to see when this error occurs and for what reason it gives that output?

For me started today, i'm playing in a friend's server with the 1.13.1 patch, for the moment i'm the only one with the problem i tried launching with the newer version of java but he problem still there. I got stuck fo some seconds in "loading terrain" and then the error pops up. The other in the server can se me log in and out.

Same issues for the last few days. Either stuck in loading terrain for half a minute +, then kicked off server with the "internal exception: java.io.IOException: an existing connection was forcebly closed by the remote host" error message. I've tried both PC and Mac, no difference. My internet speed is excellent.

So I just fixed this. I had to download 

( removed URL ) 

How my friends explained it to me, my internet needed another way to connect to that specific server. 

How did you fix it KT

Someone on a server I play on had this issue when connecting and did a packet capture of it.  From looking at it I've determined that the source of the issue is most likely due to poor connectivity and bandwidth between the server and the client.

The client does not send any data to the server while downloading the world, so if it takes longer than 30 seconds to download the world data the server will think the client timed out and close the connection.  I'm able to reliably reproduce this issue by using netem to simulate a connection with 400kbit bandwidth, 1% packet loss and 200ms latency.

what was it you downloaded?

Spyware

Had the same issue. After hours of troubleshooting, I found that I had 2 old Hyper-V virtual switches running. I removed both virtual switches and am running directly from the Ethernet adapter again. I did not have an issue with the virtual switches until updating to Win10 v1809.

I've had the same issue for about 3 months, near when the last patch came out. since then, I've updated my router firmware, bought a new computer, bought a new phone, started turning off that phone while playing, and deleting the runtime files, all to try to make a difference. none difference observed. no one else on strictly vanilla seems to be having this issue.

runescape plays fine, and youtube video is normal. fast.com reports my connection at 14-15Mbps.

my next step is to replace the modem and see if it makes any difference.

edit: the server always says I have at least 3 bars of connection

Also experiencing this issue.

I have this issue, often, Also a "regular" Timeout errors. it does seem so happend when there is many animals and pigmen around (for example on my zombie pigman farm, and around my animal pens. It seems to work almost normal when im traveling around, But it happends then too, just not as often.

Its actualy so bad it sometimes take my whole ADSL2+ line down for a minute or so when its reconnecting.

My line is not fast 6mbit down and 0.6 up. could it be the upload speed that is the problem?

I'm getting this error on several servers, 1.13.2. My internet speeds are in the 100+ Mb/s range over wifi to a router on a Gigabit network. I have ran many line tests, and have no dropped packets, and my ping jitter is under 6ms.

I could have no mobs around at all and still happens (Caves all lit within 200 blocks, nothing can spawn above)

This started happening to me after the last Java update that occurred when launching Minecraft using the Beta launcher (2.1.2474)

I have tried disabling my firewall, deleting the Java runtimes and letting them reload, reinstalling Minecraft, allocating more RAM in my variables, and nothing seems to be helping. Most common seems to be "Internal Exception: java.io.IOException: An existing connection was forcibly closed off by the remote host" but sometimes I get "Timed Out" while attempting to reconnect. Other players on these servers will note a huge lag spike on the server before it happens, so they all seem to know right when I'm going to get kicked, but nobody else does. These are all vanilla, not Spigot/Bukkit. I'll also try the vanilla client, same issue, so I now it isn't Optifine.

Also experiencing this issue.

Someone recently told me how to fix the issue. This is what I did: Search "Windows Defender Firewall" -> Click on "Allow an app or feature through Windows Defender Firewall" -> Scroll down until you find "Java(TM) Platform SE Binary" (there might be a couple of them) -> Make sure the check is only on private not public.

It hasn't kicked me for more than a couple of days! I hope it continues to work!

I have tried literally everything, including the suggestion here, and I'm still being kicked from minecraft for this issue. I can't even use minecraft because I can only be on for about a minute maximum.

Confirmed for 19w08b

also after reading through older comments I would like to point out that I use jav. it's not just exe version. I also have tried with optifine attached. I rebooted my entire computer. I switched my firewall settings to private. I reset my router and made sure it wasn't any router connections, and I've even had a computer expert try to help me with the issue. I can play any and all of my other games without server issues. it is most definitely a minecraft bug and I know about 4 other players that I am on a personal level of friendship with that have the same problem. sometimes I'm only in game for a few seconds before it boots me out, and it does it over and over and over again. it would be very appreciated if this could be investigated further as I also know several players that have quit minecraft all together because of this bug not allowing them to play with ease and I've been in conversations where those former players warn people not to get the game at all because of the level of frustration. I love minecraft way too much to cut and run just yet, but if it only allows me to be on for a few minutes at a time continuously, you better believe I've considered dropping it. Please don't think of this message as spam. This is my second and last message about this issue. I just wanted to create further awareness that this is a game bug interrupting connection, not a connection problem itself. Maybe the servers are too heavy kb?? Idk, juse please consider further investigation for the sake of keeping minecraft alive.

If this is still happening to you do the following:

Open up CMD and type "ipconfig /flushdns"

after you done that Restart the internet router or modem and after you done that, restart your pc and you should be good to go.

At the top of @Yarin Levi said...

Yes, Its true if you open command prompt and run "ipconfig /flushdns".

If that does not help or you do not understand a word he/she is saying, Its a internet problem.

Therefore Mojang nor anyone can help you.

Issue still persists for me after trying all options. I am the host; my buddy can't join my server no matter what we do. We can play on 1.12 just fine. When will the support staff actually do something about this, like disabling the server timeout feature?

My friend used to join, take forever to load in, get in the game and lag out for a little bit and then he'd be okay. Now he gets the io exception message and is kicked off. From my side, it says he lost connection: time out.

Why not add a config option for server hosts to just disable timeout kicks? This is kind of ridiculous that this has been a problem for so long for so many people and the only ones offering suggestions are a couple players who got it to work.

Confirmed for 1.14, my friend connects then after 28 - 30 seconds he got kicked and this error appears on his screen

1.14 seems to have a MUCH higher rx packet, so anyone without a perfect internet connection is going to have these sorts of issues, especially if spawn is highly modified or has a decent number of entities. We discovered this when updating even to 1.13 - players logging in for the first time on that version would need teleported away from spawn upon login showing on server, and even then may take a few tries. The timeout is exactly what it is: Minecraft is sending way to many packets to effectively handle before the game thinks it is having trouble connecting.

I thought it was my server problem because I have this issue too.

I continuously have this issue with 1.14 with my Minecraft Realms server. My friend connects fine. I connect fine and don't lag 95% of the time, but it still boots me out with this message being the most common. It's very obnoxious and there is seemingly no solution.

Edit: I want to add that the time between kicks is random. Could be 10 seconds after a log on, could be 15 minutes or more.

I have this problem. Not all the time. But most of the time at the moment. On my friends realm. Is there a fix yet? I am running 1.14.1

Right now, check your internet connection, and not just speed. I recommend the HTML5 test from Sourceforge. Check for any dropped packets and dips in speed as you will see a line graph as it tests. That will be the first place to look. I would hope the Realms servers should be able to handle their own game they were designed for.

If that doesn't work, get the Realms owner to turn off the server, switch worlds, switch back, and restart it. This should get it fully rebooted and fix it, only temporarily.

I'm playing on version 1.13.2 and this has been happening a lot (like almost every time I try to play) I thought it was my connection so I have been keeping a close eye on my latency and bandwidth. I've watched through task manager which wasn't very helpful as it would say Minecraft was only using about .5Mb/s to 2Mb/s during connection even though I was getting more bandwidth to to the pc. I have also been running speed tests before and after connection failure and after success and haven't noticed any major deviation in my net speed. i have previously ran many test for packet loss and don't seem to have any issues with that in my hardware.

@Joseph D Wiley Many ISPs, and their plans, have a much lower Upload speed then their Download speed. And you also have to figure - You may be getting up to 2 Mbps from the server, but add in the other players on that server? And then that won't be the only server at that host. Or if it's an individual hosting from their PC, consumer plans are even more restrictive. For example, Cox in my area will have even their Gigabit connection plan, but it only offers up to 35 Mbps upload. That means their most expensive plan ($100 USD/month) would crap out around around 15-20 players, easily.

And, previous versions were not as bad as 1.13+ with the amount of data handled by the server. And 1.14+ has been ever harsher.

That being said, I've noticed that it's slightly better in 1.14.2 Pre2, but the lowest I've gotten in a naturally generated world has been around 1.4 Mbps, and entity cramming from overbreeding in a tight space can easily push that over 4.5 Mbps. (I had about 50 cows in a 7x1 pen)

I have been having this problem as well and I just bought a new router to hook up to my modem. I am so confused on why this is going on. I have been trying to join my friend ( which he runs a spigot 1.14 server with a few plugins installed ) and there is no error on his end either.

I have this issue on all three of my available wi-fi connections. It occurs when I try to connect to my boyfriend through LAN. I have no issues with these internet connections otherwise. It happens irregularly since yesterday.

I also tried disabling my antivirus, and I made sure that my firewall was not blocking the program.

>OK. Using the bundled Java runtime and am able to connect to 1.12.2 without timeouts

Hi again. I haven't had this problem since last time (28/Apr/2018) ... until now, with 1.14.2 pre-release 4. Same problem on two computers "Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host." This happens after about 20 seconds of connection, while stuff loads.

Finally, I tried disabling the bundled Java executable and using the one configured (i.e. C:\Program Files (x86)\Minecraft\runtime\jre-x64\bin\javaw.exe). I found that after saving the change and reopening the launch options to double-check that the change persisted that it had reverted to the bundled Java executable. Of course, this makes sense as the one configured is the bundled one.

But this allowed me to login and not get disconnected due to timeout. In other words, changing the default Java executable to the explicit URL of the default Java executable fixed the problem. I haven't used a non-default Java since I had the problem with 1.12.2, but forcing it to re-save the option to use the bundled version appears to make the timeout issue go away.

I note that this bug is still un-resolved, although the other issue links are all resolved, probably because they were not the same problem. Obviously there are many people reporting the same symptoms with recent versions, since this bug was created in 2013.

Could it be that the default bundled Java option is not the one that is configured (i.e. C:\Program Files (x86)\Minecraft\runtime\jre-x64\bin\javaw.exe)?

Hey Paul, could you give me a step-by-step process of how you solved this in layman's terms?

Hey Paul Williams, could you give me and Ben White a step-by-step process of how you've solved this issue in layman's terms?

Ya this is happening with me to, my friend who most of the time could play 1.13 multiplayer with me cannot even get into the server at all after 1.14, not once. She starts to load for a second and then gets the same error, but 1.13 and other versions before 1.13 of minecraft does not do this to her and we can play fine. Pretty annoying that she cant even play minecraft at all at the moment, and considering the longer load times and stuff with this version is ridiculous. Its pretty disappointing. I have looked at my router, I even reset it back to factory, forced an IP change, turned off firewall, and we did the same things on her end as well, nothing worked. I can enter my servers freely, so other then weird bugs in game thats about it. Seriously....what is going on.

@unknown, 

@unknown

I can't claim that this solved the bug, but the steps I took that solved it for me were:

1. Start Minecraft Launcher

2. Select "Launch options" tab

3. Select your world

4. Enable Java executable (should say something like "C:\Program Files (x86)\Minecraft\runtime\jre-x64\bin\javaw.exe", previously "<Use bundled Java runtime>", unless you have already overridden the Java executable before, in which case disable the Java executable, so that it reverts to bundled Java runtime)

5. Click on SAVE

6. Optionally check the world options again (you should find that the Java executable has reverted to "<Use bundled Java runtime>")

7. Select "News" tab

8. PLAY your world

Anyone please post a message saying whether this makes any difference, or not.

Currently testing
An immediate side effect is, the Command Prompt has opened and is empty. It has the Java icon in the corner and it has "C:\Program Files (x86)\Minecraft\runtime\jre-x64\bin\java.exe" (Running twitch, so the minecraft folder is in a different, and longer, path).

Edit: Take my info with a grain of salt, as i might've changed the outcome by making the Java Bundle, have java.exe. (The one in the bin folder)

same

Still having this issue. On 1.13 through 1.14.2. What's weird is that a year ago I was hosting a server on 1.12 and 1.13 and everything worked fine. (Same router, everything) Tried different PCs on the network and they all had the same issue: players ON the server's network connect fine. But players OUTSIDE the server's network would sometimes randomly get this error. Usually I could fit 1-3 players from outside the network on fine, but then any players after that would run into the error.

As for the "fix" in the image, I can't find a legitimate .jar launcher.'

Edit: should add I have already tried...

• Factory resetting my router

• Opened every firewall/port for minecraft and java in both Windows and my router

• Tried 3rd party launchers

• Reinstalled the game (even though all of my friends are having the same issue)

• Trying different server files

• Basically anything you can find on Google. Trust me I've tried everything...

It's months that I get this error and makes me feel bad about Minecraft.

Im really disappointed that this hasnt been addressed by mojang yet specially since this is also happening to people who own REALM worlds, certain people cant even access realm worlds that there friends pay for to play, but if people cant access someones realms then there has to be a problem right ?. But Im starting to think is it maybe cause this update is just so heavy for skeleton computers or something and its giving the wrong error or something? Im hearing that some of my friends are not having this problem going into servers, some of them have 800$ + rigs and dont seem to have an issue so, is it really your rig or is it actually java or the game? ...I dont know.... I think we should get more people explaining what hardware they have if you are getting this error and maybe it will help out this section. 

@Kenneth Snell
I'm running an Omen. It's pretty old now, but it can run games with good graphics. It's not an issue with your rig. It's an issue with Java, or your internet provider. Solving the Java issue is easy (Look at Paul Williams comment about 5 days ago). But the internet provider part is permanent, as they simply are giving you a low upload speed. You would need to switch providers in order to solve that problem, but I'm sure that any normal person wouldn't be able to afford to switch providers willy nilly.

@Robert Hostetler II

I can understand that, but it still dont make sense that suddenly this is a problem, my internet package has not changed and it was fine before 1.14 and new minecraft launcher update so I just dont know. Like I said, she was able to play if we played 1.13 version but as soon has we tried 1.14, nope couldnt do it. I just hate my GF cant play with me on my servers. She wont know if its on her side but it still dont make sense that she was able to play on the server then suddenly nope. Her laptop is really old and wacky sometimes so I wana think it was her laptop but she is able to play single player without any problems at all, not crashing, nothing. Also about pauls suggestion, I had her do that, it still didnt work ether so im really not sure.

What helped me fix this problem is just updating Java.

I hope this helps for you guys too.

I also have this problem and nothing I have done can fix it. I have reinstalled Minecraft, uninstalled and reinstalled various versions of java that have worked in the past and reset my router. This is also sad because I pay for a realms server that I can't play on for more than 30 seconds before being kicked. 

This is a generic network error, very similar to "Timed Out" - most cases can be solved by the tech support team. If you do enocunter this issue and none of the technical support resources can help you, please let us know.

For technical support please use the Mojang Support Center.

This is not a generic network issue, the client does not send any data to the server while downloading the world, if it takes longer than 30 seconds to download the world data the server will think the client timed out and close the connection.

I can confirm that the world will just barely begin to load before booting me out. I have a fairly good connection, and this has only happened to me in 1.14+. 

i get this error as well. it happens after minute of playing and the server just doesn't send me any more packets. blocks don't pickup and you cant type in chat and then it crashes. i thinks its the servers issue because i play on my friends server that he hosts and it crashes but i go on Hypixel and it never crashes. and i have pretty good internet so wifi is ruled out.

I get this error but mine seems alot different then all yours from what i hearing cause i usually get the error every like 30min or hour of playing a server no matter what server i play or what version of minecraft i play. my pc is windows 10 not sure if that effects anything 

Ive tried so much just going to list down what ive done but still didnt help and hopefully someone can help me

Ive deleted my .minecraft folder to see if that helps

Ive check to make sure everything on my pc is up to date (windows,Drivers,Java) 

Ive disable my anti-virus to see if that helped but didn't

ive disable windows firewall to see if that helped but didn't 

Ive search through technical support couldn't find anything to help me with this

Ive restarted my router, ive also brought a better connection adapter thinking that might help but didn't 

Ive played on multiple minecraft servers and every server i get this error and it always seems to be like every 30mins or an hour when it happens 

ive restarted my pc multiple times thinking that might help but didn't 

Ive reinstalled java

Ive resintalled minecraft launcher 

ive looked on google of the error and trying other peoples solutions  to this error but still didn't help

I really need help im like on the edge of just quitting minecraft to get away from this stressful error that im dealing with day in and day out 

I've noticed that if I keep my F3 screen up, I can actually watch as the server just stops sending information to the client. I could be chatting on Discord at the same time, no difference in quality, I could be listening to music or have a video going on with no issue, or sometimes not doing anything else at all on my PC. I've tested my connection, I have 120+Mbps down, 100+Mbps down, no dropped packets, decent ping. Our server, which is vanilla, will just randomly stop sending information to players. The rx will drop down, from anywhere down to 2-0, before getting the error. And this is much more frequent with 1.14+, but it started becoming a real issue in 1.13 for us.

so we know its not an internet error. its not server issues. so that boils down to java or some other unknown thing, but what is that unknown thing

My friend appeared to have been facing a similar issue, but she seems to have found a resolution. By searching Windows for the "Windows Defender Firewall with Advanced Security," going into Inbound Rules, and then setting all of the "Java(TM) Platform SE binary" objects to the "Private" profile option, she was able to stop this error from occurring.

This worked for my friend, so give it a try and see what happens!

I have been having the same issue now but it is only for realms. I recently got a realm for me and my friends and after an hour or so of playing I started getting kicked with that message. Now it happens every time I try to join the realm after varying amounts of time (could be 5 seconds to 20 mins). I have tried everything said in this post but nothing has worked. I decided to go back to a dedicated server I run for now because I don't get kicked off of it, but would love to get the realm working since its always on. Also its just me that kicked off the realm, none of my friends are.

Was this ever fixed? I am currently experiencing this on any version i play on and I keep getting kicked on any server info on sonits clearly not the servers so there's something wrong with me. I get kicked out anywhere from 2mins to instantly