On Nov. 24th my server started crashing randomly and I couldn't understand why. But after several days of investigating I found the cause. I created a guardian farm that can either kill guardians with fall damage in the overworld or send them into the nether via portal to farm for experience due the infinite mob cap. The instant even one guardian goes through a nether portal, my server closes. I press a button and the farm kills the guardian from fall damage and none go through the portal, the server stops crashing. I've tested this several times and guardians entering the nether portal is the root of my issue. Very disappointed because I spent over a month building this farm and it was working perfectly without error for all of the weeks leading up to the release of 1.8.1.
I just did a test and apparently there is a bug with this specific nether portal. When I throw and item through the nether portal and then I jump into the nether portal, I get sent to a completely unconnected nether portal. However, if I just walk through the portal and do not throw an item or mob through the portal it sends me to the correct connected portal. I think this is why when the mob go through the portal, it kicks everyone from the server. I've copied the most recent log of what happened after I threw an item through the nether portal in question and walked through it causing me to get kicked from the server.
[18:39:59] [Client thread/INFO]: Setting user: Zaraxas
[18:39:59] [Client thread/INFO]: (Session ID is token:7b3beff99fc742adb5a247bd42492d92:23085e77411341188315390c9a62f644)
[18:40:01] [Client thread/INFO]: LWJGL Version: 2.9.1
[18:40:01] [Client thread/INFO]: Reloading ResourceManager: Default, Equanimity.zip
[18:40:03] [Sound Library Loader/INFO]: Starting up SoundSystem...
[18:40:03] [Thread-6/INFO]: Initializing LWJGL OpenAL
[18:40:03] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[18:40:03] [Thread-6/INFO]: OpenAL initialized.
[18:40:04] [Sound Library Loader/INFO]: Sound engine started
[18:40:06] [Client thread/INFO]: Created: 1024x1024 textures-atlas
[18:40:08] [Client thread/INFO]: Realms library version == 1.7.4
[18:40:09] [MCO Availability Checker #1/INFO]: Realms is available for this user
[19:07:11] [Client thread/INFO]: [CHAT] jgray46 left the game
[19:16:45] [Client thread/ERROR]: Item entity 244757 has no item?!
[19:17:10] [Client thread/ERROR]: Item entity 245003 has no item?!
[19:17:15] [Client thread/ERROR]: Item entity 245048 has no item?!
[19:17:34] [Client thread/ERROR]: Item entity 245266 has no item?!
[19:17:43] [Client thread/ERROR]: Item entity 245386 has no item?!
[19:17:43] [Client thread/ERROR]: Item entity 245386 has no item?!
[19:19:11] [Client thread/ERROR]: Item entity 246671 has no item?!
[19:19:11] [Client thread/ERROR]: Item entity 246671 has no item?!
[19:19:21] [Client thread/ERROR]: Item entity 246782 has no item?!
[19:19:21] [Client thread/ERROR]: Item entity 246782 has no item?!
[19:19:21] [Client thread/ERROR]: Item entity 246782 has no item?!
[19:19:21] [Client thread/ERROR]: Item entity 246782 has no item?!
[19:19:21] [Client thread/ERROR]: Item entity 246782 has no item?!
[19:19:47] [Client thread/ERROR]: Item entity 247257 has no item?!
[19:19:47] [Client thread/ERROR]: Item entity 247257 has no item?!
[19:19:47] [Client thread/ERROR]: Item entity 247257 has no item?!
[19:19:47] [Client thread/ERROR]: Item entity 247257 has no item?!
[19:19:47] [Client thread/ERROR]: Item entity 247257 has no item?!
[19:19:47] [Client thread/ERROR]: Item entity 247257 has no item?!
[19:19:47] [Client thread/ERROR]: Item entity 247257 has no item?!
[19:19:49] [Client thread/ERROR]: Item entity 247314 has no item?!
[19:19:49] [Client thread/ERROR]: Item entity 247314 has no item?!
[19:19:49] [Client thread/ERROR]: Item entity 247314 has no item?!
[19:19:49] [Client thread/ERROR]: Item entity 247314 has no item?!
[19:19:49] [Client thread/ERROR]: Item entity 247314 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:51] [Client thread/ERROR]: Item entity 247343 has no item?!
[19:19:52] [Client thread/ERROR]: Item entity 247345 has no item?!
[19:19:52] [Client thread/ERROR]: Item entity 247345 has no item?!
[19:19:52] [Client thread/ERROR]: Item entity 247345 has no item?!
[19:19:52] [Client thread/ERROR]: Item entity 247345 has no item?!
[19:19:52] [Client thread/ERROR]: Item entity 247345 has no item?!
[19:20:05] [Client thread/ERROR]: Item entity 247477 has no item?!
[19:20:05] [Client thread/ERROR]: Item entity 247477 has no item?!
[19:20:05] [Client thread/ERROR]: Item entity 247477 has no item?!
[19:20:05] [Client thread/ERROR]: Item entity 247477 has no item?!
[19:20:05] [Client thread/ERROR]: Item entity 247477 has no item?!
[19:20:29] [Client thread/ERROR]: Item entity 247896 has no item?!
[19:20:29] [Client thread/ERROR]: Item entity 247896 has no item?!
[19:20:29] [Client thread/ERROR]: Item entity 247896 has no item?!
[19:20:29] [Client thread/ERROR]: Item entity 247896 has no item?!
[19:20:29] [Client thread/ERROR]: Item entity 247896 has no item?!
[19:24:27] [Client thread/ERROR]: Item entity 251661 has no item?!
[19:24:27] [Client thread/ERROR]: Item entity 251661 has no item?!
[19:24:27] [Client thread/ERROR]: Item entity 251661 has no item?!
[19:24:27] [Client thread/ERROR]: Item entity 251661 has no item?!
[19:24:27] [Client thread/ERROR]: Item entity 251661 has no item?!
[19:26:16] [Client thread/ERROR]: Item entity 252556 has no item?!
[19:26:16] [Client thread/ERROR]: Item entity 252556 has no item?!
[19:26:16] [Client thread/ERROR]: Item entity 252556 has no item?!
[19:26:16] [Client thread/ERROR]: Item entity 252556 has no item?!
[19:26:16] [Client thread/ERROR]: Item entity 252556 has no item?!
[19:26:17] [Client thread/ERROR]: Item entity 252557 has no item?!
[19:26:17] [Client thread/ERROR]: Item entity 252557 has no item?!
[19:26:17] [Client thread/ERROR]: Item entity 252557 has no item?!
[19:26:17] [Client thread/ERROR]: Item entity 252557 has no item?!
[19:26:17] [Client thread/ERROR]: Item entity 252557 has no item?!
[19:27:12] [Client thread/ERROR]: Item entity 253220 has no item?!
[19:27:12] [Client thread/ERROR]: Item entity 253220 has no item?!
[19:27:12] [Client thread/ERROR]: Item entity 253220 has no item?!
[19:27:12] [Client thread/ERROR]: Item entity 253220 has no item?!
[19:27:12] [Client thread/ERROR]: Item entity 253220 has no item?!
[19:27:18] [Client thread/ERROR]: Item entity 253327 has no item?!
[19:27:18] [Client thread/ERROR]: Item entity 253327 has no item?!
[19:27:18] [Client thread/ERROR]: Item entity 253327 has no item?!
[19:27:18] [Client thread/ERROR]: Item entity 253327 has no item?!
[19:27:18] [Client thread/ERROR]: Item entity 253327 has no item?!
[19:27:18] [Client thread/ERROR]: Item entity 253327 has no item?!
[19:27:18] [Client thread/ERROR]: Item entity 253327 has no item?!
[19:27:18] [Client thread/ERROR]: Item entity 253327 has no item?!
[19:27:18] [Client thread/ERROR]: Item entity 253327 has no item?!
[19:28:20] [Client thread/ERROR]: Item entity 254555 has no item?!
[19:28:33] [Client thread/ERROR]: Item entity 254619 has no item?!
[19:28:34] [Client thread/ERROR]: Item entity 254619 has no item?!
[19:28:34] [Client thread/ERROR]: Item entity 254619 has no item?!
[19:29:58] [Client thread/ERROR]: Item entity 256091 has no item?!
[19:32:31] [Client thread/ERROR]: Item entity 258305 has no item?!
[19:32:31] [Client thread/ERROR]: Item entity 258305 has no item?!
[19:32:31] [Client thread/ERROR]: Item entity 258305 has no item?!
[19:32:31] [Client thread/ERROR]: Item entity 258305 has no item?!
[19:32:31] [Client thread/ERROR]: Item entity 258305 has no item?!
[19:34:36] [Client thread/ERROR]: Item entity 259397 has no item?!
[19:34:36] [Client thread/ERROR]: Item entity 259397 has no item?!
[19:34:36] [Client thread/ERROR]: Item entity 259397 has no item?!
[19:34:36] [Client thread/ERROR]: Item entity 259397 has no item?!
[19:34:36] [Client thread/ERROR]: Item entity 259397 has no item?!
[19:40:15] [Client thread/ERROR]: Item entity 261998 has no item?!
[19:40:15] [Client thread/ERROR]: Item entity 261998 has no item?!
[19:40:15] [Client thread/ERROR]: Item entity 261998 has no item?!
[19:40:15] [Client thread/ERROR]: Item entity 261998 has no item?!
[19:40:15] [Client thread/ERROR]: Item entity 261998 has no item?!
[19:40:20] [Client thread/ERROR]: Item entity 262069 has no item?!
[19:40:20] [Client thread/ERROR]: Item entity 262069 has no item?!
[19:40:20] [Client thread/ERROR]: Item entity 262069 has no item?!
[19:40:20] [Client thread/ERROR]: Item entity 262069 has no item?!
[19:40:20] [Client thread/ERROR]: Item entity 262069 has no item?!
[19:40:39] [Client thread/ERROR]: Item entity 262270 has no item?!
[19:40:39] [Client thread/ERROR]: Item entity 262270 has no item?!
[19:40:39] [Client thread/ERROR]: Item entity 262270 has no item?!
[19:40:39] [Client thread/ERROR]: Item entity 262270 has no item?!
[19:40:39] [Client thread/ERROR]: Item entity 262270 has no item?!
[19:41:27] [Realms-connect-task/ERROR]: Couldn't connect to world
java.net.ConnectException: Connection refused: no further information: ec2-54-145-248-14.compute-1.amazonaws.com/54.145.248.14:27087
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[?:1.7.0_45]
at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source) ~[?:1.7.0_45]
at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:208) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:287) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at java.lang.Thread.run(Unknown Source) ~[?:1.7.0_45]
[19:41:31] [Realms-connect-task/ERROR]: Couldn't connect to world
java.net.ConnectException: Connection refused: no further information: ec2-54-145-248-14.compute-1.amazonaws.com/54.145.248.14:27087
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[?:1.7.0_45]
at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source) ~[?:1.7.0_45]
at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:208) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:287) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at java.lang.Thread.run(Unknown Source) ~[?:1.7.0_45]
[19:41:36] [Realms-connect-task/ERROR]: Couldn't connect to world
java.net.ConnectException: Connection refused: no further information: ec2-54-145-248-14.compute-1.amazonaws.com/54.145.248.14:27087
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[?:1.7.0_45]
at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source) ~[?:1.7.0_45]
at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:208) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:287) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at java.lang.Thread.run(Unknown Source) ~[?:1.7.0_45]
[19:41:42] [Client thread/INFO]: Stopping!
[19:41:42] [Client thread/INFO]: SoundSystem shutting down...
[19:41:42] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com
Comments 10
I'm not necessarily sure if it was a crash per say. But I and everyone else on the server gets kicked and we get either "Server Closed", "Remote Host Closed The Connection", "Server Disconnected", etc. We've gotten several different reasons that were given to us when we're kicked from server due to guardians entering the nether portal. Minecraft doesn't exit full screen and go back to the client window so I'm not sure how to give you a crash report. Is there another way?
It also appears that throwing two items throw the portal 1 at a time gives me the "server closed" error and kicks everyone off the server.
I wasn't able to replicate the issue, at least in singleplayer. I spawned a ton of guardians next to a nether portal, and a bunch of them went into the nether without issue. I followed them through, and they were flopping around in the nether. I also had no issues with throwing items into the nether.
What could be causing this to happen if it can't be replicated? It's only the nether portal from the overworld to the nether that is causing all the trouble. Is the world corrupted?
It also appears that throwing two items through* the portal 1 at a time gives me the "server closed" error and kicks everyone off the server.
That part seems similar to MC-73866 (assuming you meant "through" with "threw").
When you say the bug is with a specific nether portal, do you mean that if you create another one nearby so that it links to the same one in the nether, that you don't get the issue with things going through that one? Do you get the same issue with a portal to the nether that is far enough away that an entirely new naturally-linked set is created? Were guardians or other mobs at any point previously going through the portal without issues? If you let non-guardian mobs go through the portal, does that cause any issue as well? I'd look into those questions as a starting point to get the details needed for others to replicate your issue. You might try running a fresh world and then going through and setting things up so that you are able to list the steps you took to replicate the issue yourself, and posting those once you are able to.
Alright so apparently the nether portal in question was indeed the problem. However I do not know why. I created a nether portal in the overworld within 10 blocks of the portal in question. This new portal was first linked to original portal in the nether and the problem still happened. So I then proceeded to tear down the buggy nether portal in the nether and moved it backward about 2 blocks and now I can throw blocks and let mobs go through the nether portal and I no longer get kicked. It appears that the problem is specific to a certain location in my nether and not the over world. I have a mob collection chamber in the nether for my guardian farm that is only 1x2 blocks big. Maybe it's too small for 1.8.1 and causing them to bug out cause not enough space? However, I don't see why any changes in 1.8.1 would cause this. Maybe a corrupted chunk.
I've got the same problem with a guardian farm.
After a few guardians has gone into the portal the server crashes and I get an error message. I've also tested to throw items into the portal with the same result. When I throw items into a portal nearby it works fine.
I reverted the server back to 1.8 and everything works as it should again.
Conny, your issue is MC-73866.
If it crashed, please attach the crash report so that we can diagnose your issue.