I recently upgraded to the m1 mac. And am trying to set up my scala environment for a project. However, I'm getting this error when I'm trying to get my sbt to sync.
[error] [launcher] error during sbt launcher: java.lang.ClassCastException: class java.lang.UnsupportedOperationException cannot be cast to class xsbti.FullReload (java.lang.UnsupportedOperationException is in module java.base of loader 'bootstrap'; xsbti.FullReload is in unnamed module of loader 'app')
I was on corretto at first. But then I read somewhere and downloaded temurin via installing through sdk using
sdk install java
sdk install sbt
After installing it, I'm able to run sbt on the project in my terminal. However, within Intellij (even after changing the java sdk to temurin). I'm still getting that error.
The solution that I came upon to fix this was by using the right Java sdk. Using Corretto wasn't working, so I used sdkman to download java sdk instead. It downloaded Java Temurin, and i then changed to use Temurin. It worked after.
Related
I am trying to follow some tutorials to learn more about Scala and I am trying to use it in IntelliJ in my computer (MacBook Pro M1). I installed sdk using sdkman. However, I get certain errors regarding it and I don't know how to fix this.
EDIT: Following a suggestion below, more info about how I installed this:
I am trying the Introduction to Scala course on LinkedIn Learning. I installed the community version (Apple Sillicon) of IntelliJ available here, then Scala using the command curl -fL https://github.com/coursier/launchers/raw/master/cs-x86_64-apple-darwin.gz | gzip -d > cs && chmod +x cs && (xattr -d com.apple.quarantine cs || true) && ./cs setup available here. Finally, I used curl -s "https://get.sdkman.io" | bash and source "$HOME/.sdkman/bin/sdkman-init.sh" to install SDK, following what is available here.
After all that, the error below appears when I go into terminal and write sbt -version or if I try to run something in IntelliJ:
java.lang.ClassCastException: class java.lang.UnsupportedOperationException cannot be cast to class xsbti.FullReload (java.lang.UnsupportedOperationException is in module java.base of loader 'bootstrap'; xsbti.FullReload is in unnamed module of loader 'app')
at sbt.internal.XMainConfiguration.run(XMainConfiguration.java:59)
at sbt.xMain.run(Main.scala:46)
at xsbt.boot.Launch$.$anonfun$run$1(Launch.scala:149)
at xsbt.boot.Launch$.withContextLoader(Launch.scala:176)
at xsbt.boot.Launch$.run(Launch.scala:149)
at xsbt.boot.Launch$.$anonfun$apply$1(Launch.scala:44)
at xsbt.boot.Launch$.launch(Launch.scala:159)
at xsbt.boot.Launch$.apply(Launch.scala:44)
at xsbt.boot.Launch$.apply(Launch.scala:21)
at xsbt.boot.Boot$.runImpl(Boot.scala:78)
at xsbt.boot.Boot$.run(Boot.scala:73)
at xsbt.boot.Boot$.main(Boot.scala:21)
at xsbt.boot.Boot.main(Boot.scala)
[error] [launcher] error during sbt launcher: java.lang.ClassCastException: class java.lang.UnsupportedOperationException cannot be cast to class xsbti.FullReload (java.lang.UnsupportedOperationException is in module java.base of loader 'bootstrap'; xsbti.FullReload is in unnamed module of loader 'app')
I have no idea what this means and how to fix this. Could someone help me, please?
I was able to get it working by following this instructions from the repo xsbt
on the modifying SBT section stating,
If a project has project/build.properties defined, either delete the file or change sbt.version to 0.13.0-SNAPSHOT.
In my case, the reason was in the JDK version. After this steps it works properly.
Check the java version:
java -version
Check all the JDK installed on your Mac:
/usr/libexec/java_home -V
Update the version:
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
Source: http://lertsirikarn.blogspot.com/2022/05/how-to-fix-sbt-error-error-during-sbt.html
I am trying to compile the scala/Play framework example application on my local machine, but I am getting compilation errors when trying to compile using the SBT console in IntelliJ:
error: scala.reflect.internal.MissingRequirementError: object java.lang.Object in compiler mirror not found.
I also got this message in the event log related to different SBT versions:
14:48 Started sbt shell with sbt version 0.13.18 instead of 0.13.11 configured by project.
Update sbt version
Disable version override
Any suggestions on how to fix this?
For the first error
error: scala.reflect.internal.MissingRequirementError: object java.lang.Object in compiler mirror not found.
You might want to try and ensure that you are using a compatible java version. Like #cbley suggested, try making you are using version 8 of the JDK.
For the second error
14:48 Started sbt shell with sbt version 0.13.18 instead of 0.13.11 configured by project.
Update sbt version
Disable version override
Its just suggesting you update the version of sbt (which is most likely declared in your build.properties file in a folder called project. You can just search for it by double tapping shift in IntelliJ. But you are safe to ignore it if you cloned some example repository as well.
check
I'm very new to Scala and I tried to run Scala project under Eclipse. I used sbt to create one, then ran sbteclipse to prepare it for Eclipse and imported it successfully. However when I try to run it I get
Error: Unable to initialize main class Main
Caused by: java.lang.NoClassDefFoundError: scala/Function0
error. Scala, sbt and Java are installed, because when I try to run the same project via console, using sbt, it works. What am I missing?
Thanks for any help!
It looks like the classpath of your Eclipse project is incomplete: it's missing the Scala library. Can you double check in Project Settings that the scala library is present?
If all you want to do is try a simple program, an simpler solution is to create a New Scala Project using the Eclipse wizard.
I created a new app using command play new hello and cd'ed into the directory. When I type play in the directory, I receive the following error:
akshay#Akshay:~/play/testn$ play -help
Java HotSpot(TM) Server VM warning: ignoring option MaxPermSize=512M; support was removed in 8.0
Getting org.scala-sbt sbt 0.13.0 ...
:: retrieving :: org.scala-sbt#boot-app
confs: [default]
0 artifacts copied, 43 already retrieved (0kB/45ms)
Error: Could not retrieve sbt 0.13.0: missing sbt.xMain
Play was working fine in my old Ubuntu box. Today only I got a fresh copy of Ubuntu 12.04 32 bit. I know it is error due to change in version, but certainly, I am not able to solve this. Please help me on this.
In checked .sbt/boot/update.log and I can see this :
trying http://repo.typesafe.com/typesafe/ivy-releases/org.sonatype.oss/oss-parent/7/jars/oss-parent.jar
tried http://repo.typesafe.com/typesafe/ivy-releases/org.sonatype.oss/oss-parent/7/jars/oss-parent.jar
HTTP response status: 404 url=http://repo.typesafe.com/typesafe/ivy-releases/org.sonatype.oss/oss-parent/7/jars/oss-parent.jar
CLIENT ERROR: Not Found url=http://repo.typesafe.com/typesafe/ivy-releases/org.sonatype.oss/oss-parent/7/jars/oss-parent.jar
typesafe-ivy-releases: resource not reachable for org.sonatype.oss#oss-parent;7: res=http://repo.typesafe.com/typesafe/ivy-releases/org.$
trying http://repo1.maven.org/maven2/org/sonatype/oss/oss-parent/
Though error was coming from a fresh ubuntu installation with oracle jdk 8, I tried completely removing jdk and then installing jdk 7, but still no solution. Since it was a fresh installation, I reinstalled ubuntu and installed jdk 7 and problem is solved. Not sure why is it contradictory to Play's recomendation of using Jdk 6 or above. Notifying Play Google Groups about this.
I was getting the same error while trying to build using sbt-launcher.jar which was invoked through jenkins. In my case there were two Scala versions within ~/.sbt/boot/ and removing the older version solved the issue.
I was trying to setup my development environment for one of our projects when I hit this issue. The problem was the sbt.version parameter in the build.properties file of our project which specifically mentioned the version of sbt as 0.13.8 and I had sbt 0.13.11.
After removing sbt 0.13.11 and installing 0.13.8, the issue got resolved. Or if it is possible for you to change the sbt version in your build.properties file, you can do that as well.
I'm trying to use Miles Sabin's HList of his Shapeless project. So I installed sbt from Macports (this is version 0.11).
Unfortunately, when launching sbt, I have the following error message:
java.lang.IncompatibleClassChangeError: Expected static method scala.Predef$.refArrayOps([Ljava/lang/Object;)Lscala/collection/mutable/ArrayOps;
at xsbt.boot.Boot$.runImpl(Boot.scala:24)
at xsbt.boot.Boot$.main(Boot.scala:15)
at xsbt.boot.Boot.main(Boot.scala)
Error during sbt execution: java.lang.IncompatibleClassChangeError: Expected static method scala.Predef$.refArrayOps([Ljava/lang/Object;)Lscala/collection/mutable/ArrayOps;
Search google seems to point that sbt-launch.jar would be in classpath. But even though I export CLASSPATH to "", I still have the issue.
I also directly downloaded the sbt-launch.jar from typesafe, and running with java -jar, with exactly the same problem.
Any idea? Other people having the same issue?
EDIT
I've tracked the problem down to a Java extension under ~/Library/Java/Extensions/scala-library.jar
I have removed it and the problem is gone. I think this has been installed by the TypeSafe stack (TBC).
I have had this error, and generally uninstalling Java, and installing it again will resolve it.
OP posted:
I've tracked the problem down to a Java extension under ~/Library/Java/Extensions/scala-library.jar
I have removed it and the problem is gone. I think this has been installed by the TypeSafe stack (TBC).