HotSwap: Loaded classes are up to date. Nothing to reload on PC not on laptop

You need to specify the output path for the project, by default it's out directory under the project root directory, for some reason it's empty in your configuration, fix it here:

Enable debug logging for build.log and check build.log file for details when you Make the project. Does it notice and compile the changes?

What run/debug configuration type do you use?

If you can't find the problem, please share a sample project to reproduce it.

Sorry, I have no more ideas then. The issue cannot be reproduced, unfortunately.

Try the clean IDE installation (remove IDE folders: https://intellij-support.jetbrains.com/hc/articles/206544519) and set up the project from scratch.

I just saw your comment, in the meantime I've used absolute paths and it's working! Thanks a lot for your help and time

Great, though it's weird how your project got screwed that badly.

Serge Baranov man I love you! I am using Ubuntu, my laptop was force shut down with my local project running and everything was messed up. HotSwap was not working and I really had no clue why. I spent like 8 hours trying to figure out what was going on, I followed your recommendation and removed IDE folders (+ the .idea folder inside the project) and issue was FINALLY resolved! Thanks a lot man!

I'm looking at the build.log...

This is the run config, which is the same of the laptop

Artifact:

Compiler settings:

Debug - HotSwap settings:

Jar artifact is not updated automatically. You may want to enable the "Include in project build" option in the artifact configuration. If it doesn't help, try Application configuration instead and debug the classes that are not in a jar.

You also didn't enable debug logging as described in the document.

The changes are found (brains.jps.incremental.Builder, debug) and the artifacts is built

The "Include in project build" doesn't work, for Application configuration do you mean "JavaFX Application"? if so, it still doesn't work

Application configuration where you specify the main class and the classes are loaded from the output directory instead of a jar: https://www.jetbrains.com/help/idea/2016.3/running-applications.html

No, it doesn't work, still the same notification with no change

Please share a project to reproduce it: https://intellij-support.jetbrains.com/hc/articles/206869619.

You will need this file: http://download.getbukkit.org/13114107/spigot-188-r01-snapshot-latestjar the artifacts goes in the "plugins" folder

IntelliJ.rar is the name of the uploaded file

Please share more details how to run and debug/hotswap this project. I'm not familiar with Bukkit.

You start the server, an eula.txt file is created, open it and write "eula=true"

start it again, several folders will be created like "world" and "plugins"

put the other .jar files ("libraries" folder in the .rar) in this folder

the artifact output should be in this folder as a jar.

type "stop" to stop the server, if you start it again and type (after the Done message) "plugins" you should see some names, now it's done

OK, I found https://www.spigotmc.org/wiki/creating-a-blank-spigot-plugin-in-intellijidea/.

I started the server in Debug mode and configured the artifact jar to be deployed under plugins folder, I make a change in Main.java and do Build | Make, artifact is updated automatically on build and I get the following message which confirms that the change was reloaded:

That's what I get on the laptop, but not on the PC
Every file was uploaded from the PC

When the server is running, can you manually replace or delete plugin .jar file in the plugins folder? It could be locked by the file system in which case you can't replace it without restarting the server.

It may be OS dependent since on Linux files are not locked.

I can replace any jar file
The jar is updated, but it's not HotSwapped because of the notification

Do you start the configuration in Debug mode? Are you sure the jar artifact output is set to the correct directory?

Yes for both

Thank you, I hope that this will work better than the uninstaller

it.. it didn't work

Does SFHub.jar file timestamp change in the plugins folder after Build | Make?

Does the timestamp of plugins\SFHub.jar\silverfern\spigot\hub\Main.class file inside the jar change after a change in Main.java followed by Build | Make?

After the Cleanup, no, not anymore

Windows now locks it

For me both do change. Double check if artifact is indeed built and updated, try building the artifact manually. Check the output path where classes are compiled. .class file must update there.

Check build.log with debug info to see if Main.class gets compiled.

Ensure artifact is configured to build automatically on Build | Make.

Check idea.log for possible errors.

I've noticed a potential issue in your configuration:

Try switching back to the default option, otherwise classes get compiled into C:\ drive root.

if I use the first option I get this error

Thank you so much Baranov!!! After three days of search and try, your last suggestion saved my other 3 days AND motivation. I have read all the posts answers etc everything... If only this solution was mentioned on only one of those posts....

Cheers!

In HAlex's Hot Swap settings, "Build project before reloading classes" is checked.
But I solved this problem by unchecking it.
If you've come to this page looking for a solution, give it a try.
And please tell us the result. I'm interested if my solution works in other environments as well.