Drop Java 8 support

.github/workflows/ci.yml

@@ -9,8 +9,10 @@ on:
     types: [ published ] # Triggers the CI when a new GitHub Release is published
 
 env:
-  JAVA_OPTS: -Xms6g -Xmx6g -XX:+UseG1GC
-  JDK_JAVA_OPTIONS: -Xms6g -Xmx6g -XX:+UseG1GC # See https://stackoverflow.com/a/73708006
+  # See:
+  #  - https://stackoverflow.com/a/73708006
+  #  - https://stackoverflow.com/questions/73465937/apache-spark-3-3-0-breaks-on-java-17-with-cannot-access-class-sun-nio-ch-direct
+  JDK_JAVA_OPTIONS: -Xms6g -Xmx6g -XX:+UseG1GC --add-exports java.base/sun.nio.ch=ALL-UNNAMED
 
 jobs:
   build:
@@ -27,7 +29,7 @@ jobs:
         uses: actions/[email protected]
         with:
           distribution: temurin
-          java-version: '8'
+          java-version: '17'
           check-latest: true
 
       - name: Scala ${{ matrix.scala }} Building ${{ matrix.module }}
@@ -47,7 +49,7 @@ jobs:
         uses: actions/[email protected]
         with:
           distribution: temurin
-          java-version: '8'
+          java-version: '17'
           check-latest: true
       - run: sbt ci-release
         env:

build.sbt

@@ -332,6 +332,8 @@ lazy val basicSettings = Seq(
   scalacOptions ++= Seq(
     "-language:implicitConversions", "-explain",
     // See https://docs.scala-lang.org/scala3/guides/migration/tooling-syntax-rewriting.html
-    "-no-indent"
-  )
+    "-no-indent",
+    "-release:11",
+  ),
+  javacOptions := Seq("-source", "11", "-target", "11"),
 )

docker-compose.yml

@@ -121,7 +121,7 @@ services:
       - ~/.m2:/root/.m2:cached
       - ~/.sbt:/root/.sbt:cached
     environment:
-      - SBT_OPTS=-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 -Dfile.encoding=UTF-8 -Xms512m -Xmx1536m -Xss2m -XX:ReservedCodeCacheSize=256m -XX:+TieredCompilation -XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC
+      - SBT_OPTS=-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 -Dfile.encoding=UTF-8 -Xms512m -Xmx1536m -Xss2m -XX:ReservedCodeCacheSize=256m -XX:+TieredCompilation
       - POSTGRES_HOST=postgres
       - POSTGRES_PORT=5432
       - MYSQL_HOST=mysql