DaemonUmbra

No, it’s a log to which the server/client writes entries of what it is doing and in some cases what it is doing that thing to. It’s important when the program encounters an error that it may or may not be able to skip or recover from when it makes a note of that error in the log. Information on where the log is and how we would prefer you posted it can be found in my signature (the text block below this message).

I have an idea of what might be going on, please read my signature and post the appropriate log as described.

Looking at the code it's Logical server, so technically you're right ?

I think that has to be on the server side, actually.

Please make your own thread, you have a completely separate issue...

Well that got cut off even sooner, try deleting %AppData%\.minecraft\versions\1.12.2 to force a re-download of the vanilla jar... if this doesn't work see about running a repair operation on your Java installation

I'm afraid running Minecraft servers in VMs that aren't set up specifically to run game servers is not something I'm familiar with... could you post your debug.log?

Could you run it with the splash screen enabled and post the debug.log from that run?

The only thing I can think of is deleting and re-installing Forge. To do this you'll need to delete the following folders: (Note: I am formatting these in a way that you can paste them into File Explorer's path bar, though you will need to go one level up and delete the folder) %AppData%\.minecraft\libraries\net\minecraftforge\forge\1.12.2-14.23.4.2726 %AppData%\.minecraft\versions\1.12.2-forge1.12.2-14.23.4.2726 After that try re-running the Forge installer (this process should not affect your launcher profile for this version as long as you do not try to start the game midway through).

Do you know the clock speed and core count of your VM? I can't say I'm familiar with Google Cloud but the crash report you posted is actually a stall report where the watchdog killed the server because it was running too slow.

No mods? Please note that combining Optifine and Forge is a bit tricky, each version of Optifine promises to be compatible with only a specific build of Forge, which will be noted in Optifine's changelog, check that and try to match versions.

That looks like the correct file, however it's not as helpful as I had hoped... it just stops rather than giving any helpful error messages. What do you have in your mods folder? (A screenshot would be nice)

Please post an unmodified debug.log, if the file is too big for Pastebin GitHub's Gist service allows larger files, though I don't know the maximum

Read the docs before saying anything, please. nocot is clearly trying to go the static eventhandler route and you are saying this method is wrong despite admitting not having done your research. Edit: Thread locked because OP has stated that their issue has been solved.

Thread is 2.5 years old, Locking...

Pretty sure that would get you a completely new port as the previously suitable port is now bound. If I may speak frankly if someone wants to run a server with friends they can use software like Hamachi to accomplish this task without altering the settings on their router or modem and this sounds to me like one of the things where if users can't put in the effort to learn and configure these things on their own (or in the case of <18 year olds as you put it jred, get permission to do so) then maybe they shouldn't be opening their computers to external connections.

Decocraft requires PTRLib to work

You need to use localhost, he needs to use your Hamachi IP

Do you mean it's not working for him or did you try to use the Hamachi IP on your side?

I haven't used Hamachi in a long time, but I think he DOES need to use the Hamachi address to connect

The IP is the server address your client uses to find the server. Just click the server in your client's server list and click edit.

It's a warning about something that is discouraged but still works, at least for now. You're hiding the IP for your server connection, did you set it to localhost like I suggested?

If you're on the same computer as the server you don't need Hamachi... just use "localhost" as the IP Edit: Come to think of it you shouldn't need Hamachi at all if you're on the same network as the server (behind the same router)

What IP are you using to connect to the server?

By "can't log in" do you mean connecting to the server fails when you put in the IP or do you mean it doesn't show up in your list of local servers?