Sometimes when updating a dependency version for my project, when I would run the project I would get the following error:
ERROR 09:31:34:241 apply$mcV$sp - Class could not be loaded and/or registered: scala.Enumeration$Val
ERROR 09:31:34:247 apply$mcV$sp - exception caught during akka-kryo-serialization startup: java.lang.ClassNotFoundException: scala.Enumeration$Val
java.lang.RuntimeException: Nonzero exit code: 1
at scala.sys.package$.error(package.scala:27)
I usually got lucky and was able to fix this by tweaking the versions of my dependencies.
Until I updated my akka version from 2.3.6 to 2.3.12, specifically akka-contrib which contains akka-cluster, akka-remote and akka-peristance.
Turns out that the problem was actually occurring during the transition between akka 2.3.8 and 2.3.9. Looking at the change log, I found that between these two versions the Scala version was upgraded from 2.11.4 to 2.11.5.
My project was building on scala 2.11.4. Upgrading to 2.11.5 fixed the problem.
I couldn't find any help online for this, and lost a couple days trying to figure this out. I'm hoping that this will help someone else out.
Related
I am trying to use jOOQ as dependency in a Scala 3 codebase:
libraryDependencies ++= Seq("org.jooq" % "jooq" % "3.16.6")
However when I try to do an import from this library -- like import org.jooq.DSLContext -- I get a compilation error.
The easiest way to reproduce this is using ammonite:
cs launch ammonite --scala 3.1.3
Loading...
Welcome to the Ammonite Repl 2.5.4-11-4f5bf2aa (Scala 3.1.3 Java 11.0.15)
# import $ivy.`org.jooq:jooq:3.16.6`, org.jooq.DSLContext
Bad symbolic reference. A signature
refers to ApiStatus/T in package org.jetbrains.annotations which is not available.
It may be completely missing from the current classpath, or the version on
the classpath might be incompatible with the version used when compiling the signature.
Caught: java.lang.AssertionError: assertion failed: failure to resolve inner class:
externalName = org.jetbrains.annotations.ApiStatus$Experimental,
outerName = org.jetbrains.annotations.ApiStatus,
innerName = Experimental
owner.fullName = org.jetbrains.annotations.ApiStatus
while parsing /Users/horta/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/jooq/jooq/3.16.6/jooq-3.16.6.jar(org/jooq/Named.class) while parsing annotations in /Users/horta/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/jooq/jooq/3.16.6/jooq-3.16.6.jar(org/jooq/Named.class)
Caught: java.lang.RuntimeException: bad constant pool index: 0 at pos: 740 while parsing annotations in /Users/horta/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/jooq/jooq/3.16.6/jooq-3.16.6.jar(org/jooq/Named.class)
...
This is not the complete error, it gives the same type of error on a bunch of different classes, always related with this annotation org.jetbrains.annotations.ApiStatus.Experimental.
I've reproduced this using Java 11 and 18 (openjdk), using SBT and ammonite, with all versions of Scala 3.
When using Scala 2.13.* everything works correctly, we're using that in production.
Any idea what might be going on here? Any potential clues or possible workarounds?
This is fixed in Scala 3 from version 3.2.0-RC1.
See reddit post in r/scala.
I added a dependency to the scala reflect library version 2.11.8 to one of my existing project such that I could use TypeTag's but strangely I face some error when running. Here is my error:
Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/bin/java (0x10a3ab4c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x10b4ce4e0). One of the two will be used. Which one is undefined.
Exception in thread "main" java.lang.AbstractMethodError: Method com/my/csvparser/CSVParser$.scala$App$_setter_$executionStart_$eq(J)V is abstract
at com.my.csvparser.CSVParser$.scala$App$_setter_$executionStart_$eq(CSVParser.scala)
at scala.App$class.$init$(App.scala:44)
at com.my.csvparser.CSVParser$.<init>(CSVParser.scala:13)
at com.my.csvparser.CSVParser$.<clinit>(CSVParser.scala)
at com.my.csvparser.CSVParser.main(CSVParser.scala)
Did anyone face a similar issue? My Scala version is 2.11.8
I am getting the following error while running shark 0.9.0.
Exception in thread "main" java.lang.IncompatibleClassChangeError: Found class scala.collection.mutable.ArrayOps, but interface was expected
at shark.SharkCliDriver$.main(SharkCliDriver.scala:82)
at shark.SharkCliDriver.main(SharkCliDriver.scala)
Any solution regarding the problem is highly appreciable.
Its a backward compatibility issue.
This exception is raised when the version of scala-library.jar is different during compilation and execution. Make sure that you use the same library version during compiling and executing.
if you are using hadoop 2.x version, do the below steps
find path to shark installation folder -name hadoop-core-1.0.4.jar
remove all the hadoop-core-1.0.4.jar
check this
http://bigdataanalyze.blogspot.com/2014/03/issues-on-shark-with-cdh5-beta2-1.html
I recently downgraded to Scala 2.8, and now whenever I try to initialise an actor, I get the following error message:
java.lang.NoSuchMethodError: scala.actors.ReactorCanReply$class.$init$(Lscala/actors/ReactorCanReply;)V
Apparently this guy had the same problem, but no solution was found. Has anyone else encountered this and solved it?
I thought that maybe there was some sonfusion going on in the background between Scala 2.8 and 2.9 files, so I've tried uninstalling and reinstalling both Scala and Eclipse, deleting all my binaries and rebuilding, and even creating a new Eclipse project and copying my source files in, but the problem persists.
My stack trace:
Exception in thread "main" java.lang.NoSuchMethodError: scala.actors.ReactorCanReply$class.$init$(Lscala/actors/ReactorCanReply;)V
at uk.mike.blackjack.PlayerReceiver.<init>(PlayerReceiver.scala:11)
at uk.mike.blackjack.Blackjack$.main(Blackjack.scala:141)
at uk.mike.blackjack.Blackjack.main(Blackjack.scala)
The Java bytecode compiled from Scala is not backward-compatible. You must recompile all your scala file and their dependencies when you upgrade to any new Scala version before Scala 2.10 releases.
BTW: Scala 2.10 promises to keep backward-compatible between all 2.10.x versions in the future.
I'm trying to use Miles Sabin's HList of his Shapeless project. So I installed sbt from Macports (this is version 0.11).
Unfortunately, when launching sbt, I have the following error message:
java.lang.IncompatibleClassChangeError: Expected static method scala.Predef$.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).