java.lang.NoClassDefFoundError: alda/error/ExitCode

[daveyarwood]

Moved from alda-lang/alda-core#68.

Quoth @0atman:

When I upgraded from 1.0.1 to 1.1.0, with alda update, I got this error:

Exception in thread "main" java.lang.NoClassDefFoundError: alda/error/ExitCode

However, when I re-run the update, my alda has been updated successfully.

[daveyarwood]

I see this happen all the time when I run alda update. I think there is probably something weird about the ExitCode class in the client, but I don't fully understand the problem. I believe this is the line where it's blowing up.

It's weird, though, because I only seem to see this happen when following the codepath for alda update.

Help appreciated here -- NoClassDefFoundError is black magic to me.

[0atman]

Spooky!

[daveyarwood]

👻

[TBuc]

Couldn't reproduce the issue on Windows 10. I've looked around a little but can't isolate the issue.

Could someone experiencing this issue try to generate an hash of the downloaded alda executable which throws the exception, comparing it to the hash of the working one (i.e. after re-issuing the update command) and see if they match?

[daveyarwood]

I know for a fact that the update is successful when you get this error. The JVM is just blowing up when it tries to exit.

[0atman]

Happened again on my celebratory update to 1.3.0, fyi:

Install alda '1.3.0' over '1.1.0' ? [yN]: y
Downloading https://github.com/alda-lang/alda/releases/download/1.3.0/alda...

Updated alda 1.1.0 => 1.3.0.
If you have any currently running servers, you may want to restart them so that they are running the latest version.
Exception in thread "main" java.lang.NoClassDefFoundError: alda/error/ExitCode
	at alda.Main.main(Main.java:380)
Caused by: java.lang.ClassNotFoundException: alda.error.ExitCode
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 1 more
λ ~ alda update                                                                                         1
Your version of alda (1.3.0) is up to date!```

[daveyarwood]

Alda v2 is implemented in Go, so this issue will go away when Alda v2 is released.