[MC-227931] Multiplayer (LAN) not working after update

I have been playing one shared world for over two months, without a problem. today the game updated and after I open to LAN nobody can access the world, giving the following error:
minecraft lan io.netty.channel.abstractchannel$annotatedconnectexception connection timed out (...)

I can no longer open any world to lan, but I can access other games.

Related issues

duplicates

MC-120362 io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection timed out: no further information

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Comments

migrated 2021-06-08T20:24:19Z

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migrated 2021-06-08T20:56:50Z

Hey there! I am currently not able to reproduce this bug, everything works fine for me. Could you please provide more detailed information?

migrated 2021-06-08T22:26:06Z

What information would you need?
I have already gone through all the "how to fix minecraft lan not working" tutorials and still nothing.

migrated 2021-06-10T02:37:39Z

Same here - LAN doesn't work on Latest Release 1.17.

It doesn't work on previously created worlds (before the update) and it doesn't work on a newly created world either (after the update).

I get the same error for both - like the one in the screenshot.

LAN worked fine on Latest Snapshot 1.17 and it worked fine on Latest Release 1.16.5.

migrated 2021-06-10T13:53:43Z

Make sure your client operates on Java 16. You can use this tutorial for additional help with updating Java.

This is most likely a technical support issue. Take a look at your firewall settings, something might block your connection. For further assistance please contact the Community Support.

migrated 2021-06-12T03:32:19Z

The steps here worked: MC-227814

violine1101 2021-06-12T21:17:25Z

Thank you for your report!
We're tracking this issue in MC-120362, so this ticket is being resolved and linked as a duplicate.

That ticket has already been resolved as invalid, which means this is a technical support issue. Please take a look at the parent ticket (MC-120362) and see if a solution is provided there.
If you need additional help to fix this problem, please contact Community Support and refer to this ticket (e.g. "I have reported this issue on Mojira as MC-XYZ.").

If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.

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