Script runner (2.11/2.12): "Compile server encountered fatal condition: javax/tools/DiagnosticListener" on JDK 17

Scala does not seem to work properly

pepe@pepe-MS-7C90:~$ scala -version
Scala code runner version 2.11.12 -- Copyright 2002-2017, LAMP/EPFL

pepe@pepe-MS-7C90:/code/pepe78/python-performance$ scalac main.scala
pepe@pepe-MS-7C90:/code/pepe78/python-performance$ scala main
error: Compile server encountered fatal condition: javax/tools/DiagnosticListener

Code:
object HelloWorld {
def main(args: Array[String]) {
println("Hello, world!")
}
}

pepe@pepe-MS-7C90:~$ java --version
openjdk 17.0.2 2022-01-18
OpenJDK Runtime Environment (build 17.0.2+8-Ubuntu-120.04)
OpenJDK 64-Bit Server VM (build 17.0.2+8-Ubuntu-120.04, mixed mode, sharing)

OS: Ubuntu 20.04.4 LTS x86_64
Kernel: 5.13.0-35-generic

[som-snytt]

That is an ancient version of scala, and the reported error is with the compile server. scala -help says

When running a script or using -e, an already running compilation daemon
(fsc) is used, or a new one started on demand.  The -nc option can be
used to prevent this.

Also, on the JVM, the "main class" is used as an entry point:

scala -nc HelloWorld

I think the command was

fsc -shutdown

to terminate your compile server.

➜  fsc -shutdown
[Compile server exited]

The compile server is an old feature, and at some point, -nc became the default behavior.

[som-snytt]

The community forums for questions are listed at https://scala-lang.org/community/

There is a getting started link at the top of https://docs.scala-lang.org/

I see that 2.11.12 does not run on JDK 17

➜  scala hh.scala
error: Compile server encountered fatal condition: javax/tools/ToolProvider
java.lang.NoClassDefFoundError: javax/tools/ToolProvider

There is a list of supported versions somewhere.

... but I can't find it. It doesn't seem to be a FAQ.

Edit: I see the compatibility chart is linked from the getting started page:

https://docs.scala-lang.org/overviews/jdk-compatibility/overview.html

and indeed it shows JDK 11 as highest version supported by 2.11.

this actually worked:

pepe@pepe-MS-7C90:~/code/pepe78/python-performance$ scala -nc main.scala
Hello, world!

[SethTisue]

Note that -nc (aka -nocompdaemon) is the default on Scala 2.13.0 and newer.

Note that -nc (aka -nocompdaemon) is the default on Scala 2.13.0 and newer.

Note that 'sudo apt install scala' installs 2.11.12

I just went for default

[SethTisue]

yeah, that's a sad situation — see #9299 (and various things it links to, such as scala/scala#5311)