ClassNotFoundException when using java.sql package of JDK11

[kynthus]

Compiler version

3.0.0-RC1 with Java SE Development Kit 11.0.9

Minimized code

val d: java.sql.Date = new java.sql.Date(100L)

Output

# java -version
java version "11.0.9" 2020-10-20 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.9+7-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.9+7-LTS, mixed mode)

# scala -version
Starting scala3 REPL...
Scala compiler version 3.0.0-RC1 -- Copyright 2002-2021, LAMP/EPFL
scala> val d: java.sql.Date = new java.sql.Date(100L)
Exception in thread "main" java.lang.NoClassDefFoundError: java/sql/Date
        at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
        at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3166)
        at java.base/java.lang.Class.getDeclaredMethods(Class.java:2309)
        at dotty.tools.repl.Rendering.valueOf(Rendering.scala:82)
        at dotty.tools.repl.Rendering.renderVal(Rendering.scala:121)
        at dotty.tools.repl.ReplDriver.$anonfun$13(ReplDriver.scala:308)
        at scala.collection.immutable.List.flatMap(List.scala:293)
        at scala.collection.immutable.List.flatMap(List.scala:79)
        at dotty.tools.repl.ReplDriver.extractAndFormatMembers$2(ReplDriver.scala:308)
        at dotty.tools.repl.ReplDriver.renderDefinitions$$anonfun$2(ReplDriver.scala:331)
        at scala.Option.map(Option.scala:242)
        at dotty.tools.repl.ReplDriver.renderDefinitions(ReplDriver.scala:334)
        at dotty.tools.repl.ReplDriver.compile$$anonfun$2(ReplDriver.scala:253)
        at scala.util.Either.fold(Either.scala:189)
        at dotty.tools.repl.ReplDriver.compile(ReplDriver.scala:269)
        at dotty.tools.repl.ReplDriver.interpret(ReplDriver.scala:197)
        at dotty.tools.repl.ReplDriver.loop$1(ReplDriver.scala:130)
        at dotty.tools.repl.ReplDriver.runUntilQuit$$anonfun$1(ReplDriver.scala:133)
        at dotty.tools.repl.ReplDriver.withRedirectedOutput(ReplDriver.scala:152)
        at dotty.tools.repl.ReplDriver.runUntilQuit(ReplDriver.scala:133)
        at dotty.tools.repl.Main$.main(Main.scala:6)
        at dotty.tools.repl.Main.main(Main.scala)
Caused by: java.lang.ClassNotFoundException: java.sql.Date
        at dotty.tools.repl.AbstractFileClassLoader.findClass$$anonfun$1(AbstractFileClassLoader.scala:20)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:15)
        at scala.runtime.function.JProcedure1.apply(JProcedure1.java:10)
        at scala.collection.immutable.List.foreach(List.scala:333)
        at dotty.tools.repl.AbstractFileClassLoader.findClass(AbstractFileClassLoader.scala:22)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        at dotty.tools.repl.AbstractFileClassLoader.loadClass(AbstractFileClassLoader.scala:34)
        ... 22 more

Expectation

You should be able to use the java.sql package without any problems.
There is no problem with JDK8 or Scala 2.13.5.

# java -version
java version "1.8.0_202"
Java(TM) SE Runtime Environment (build 1.8.0_202-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)

# scala -version
Starting scala3 REPL...
Scala compiler version 3.0.0-RC1 -- Copyright 2002-2021, LAMP/EPFL
scala> val d: java.sql.Date = new java.sql.Date(100L)
val d: java.sql.Date = 1970-01-01

# java -version
java version "11.0.9" 2020-10-20 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.9+7-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.9+7-LTS, mixed mode)

# scala
Welcome to Scala 2.13.5 (Java HotSpot(TM) 64-Bit Server VM, Java 11.0.9).
Type in expressions for evaluation. Or try :help.

scala> val d: java.sql.Date = new java.sql.Date(100L)
val d: java.sql.Date = 1970-01-01

In addition, although it was JDK11 that observed the error, strictly speaking, it seems to occur in JDK9 or later versions.

[odersky]

It would be good to have more info what could be the possible cause if this. Could it be a setup problem?

[kynthus]

The OS information and setup procedure are as follows.

OS(VM)：CentOS Linux release 7.6.1810 (Core) 3.10.0-957.el7.x86_64
Host OS is Windows10.

# yum install -y jdk-11.0.9_linux-x64_bin.rpm # Download from Oracle Java archive
# tar -xf scala3-3.0.0-RC1.tar.gz             # Download from Dotty releases

After that, setting the PATH to bin dir in Scala 3.0.0-RC1.
And an error when I run the Minimized code in the REPL.

I found out later, it doesn't seem to occur unless it's on the REPL.

// Test.scala

object Test {

  def main(args: Array[String]): Unit = {
    val d: java.sql.Date = new java.sql.Date(100L) // Compile and execution is successfully.
    println(d)
  }

}

# java -version
java version "11.0.9" 2020-10-20 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.9+7-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.9+7-LTS, mixed mode)
# scalac -version
Scala compiler version 3.0.0-RC1 -- Copyright 2002-2021, LAMP/EPFL
# scalac Test.scala
# scala Test
1969-12-31

# scala
Starting scala3 REPL...
scala> val d: java.sql.Date = new java.sql.Date(100L) // Same as Minimized code...
Exception in thread "main" java.lang.NoClassDefFoundError: java/sql/Date