Building with Gradle 7 on Java 16 fails

CrateDB version: 4.5.0

Environment description: FreeBSD 12.2

$ /usr/local/openjdk16/bin/java -version
openjdk version "16" 2021-03-16
OpenJDK Runtime Environment (build 16+36-1)
OpenJDK 64-Bit Server VM (build 16+36-1, mixed mode, sharing)

Problem description:

===>  Building for crate-db-4.5.0
cd /disk-samsung/freebsd-ports/databases/crate/work/crate-4.5.0 && /usr/bin/env JAVA_HOME=/usr/local/openjdk16 XDG_DATA_HOME=/disk-samsung/freebsd-ports/databases/crate/work  XDG_CONFIG_HOME=/disk-samsung/freebsd-ports/databases/crate/work  HOME=/disk-samsung/freebsd-ports/databases/crate/work PATH=/disk-samsung/freebsd-ports/databases/crate/work/.bin:/home/yuri/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin NO_PIE=yes MK_DEBUG_FILES=no MK_KERNEL_SYMBOLS=no SHELL=/bin/sh NO_LINT=YES PREFIX=/usr/local  LOCALBASE=/usr/local  CC="cc" CFLAGS="-O2 -pipe -fno-omit-frame-pointer  -fstack-protector-strong -fno-strict-aliasing "  CPP="cpp" CPPFLAGS="-fno-omit-frame-pointer"  LDFLAGS=" -fstack-protector-strong " LIBS=""  CXX="c++" CXXFLAGS="-O2 -pipe -fno-omit-frame-pointer -fstack-protector-strong -fno-strict-aliasing -fno-omit-frame-pointer  "  MANPREFIX="/usr/local" BSD_INSTALL_PROGRAM="install  -s -m 555"  BSD_INSTALL_LIB="install  -s -m 0644"  BSD_INSTALL_SCRIPT="install  -m 555"  BSD_INSTALL_DATA="install  -m 0644"  BSD_INSTALL_MAN="install  -m 444" gradle  --gradle-user-home /tmp/gradle-crate --project-cache-dir /tmp/gradle-crate   --build-cache jar
Starting a Gradle Daemon, 1 incompatible and 3 stopped Daemons could not be reused, use --status for details
Watching the file system is not supported on this operating system.
> Task :buildSrc:compileJava FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':buildSrc:compileJava'.
> java.lang.IllegalAccessError: class org.gradle.internal.compiler.java.ClassNameCollector (in unnamed module @0x11a1cf3) cannot access class com.sun.tools.javac.code.Symbol$TypeSymbol (in module jdk.compiler) because module jdk.compiler does not export com.sun.tools.javac.code to unnamed module @0x11a1cf3

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

Building with Java 11 also fails:

$ /usr/local/openjdk11/bin/java -version
openjdk version "11.0.10" 2021-01-19
OpenJDK Runtime Environment (build 11.0.10+9-1)
OpenJDK 64-Bit Server VM (build 11.0.10+9-1, mixed mode)

===>  Building for crate-db-4.5.0
cd /disk-samsung/freebsd-ports/databases/crate/work/crate-4.5.0 && /usr/bin/env JAVA_HOME=/usr/local/openjdk11 XDG_DATA_HOME=/disk-samsung/freebsd-ports/databases/crate/work  XDG_CONFIG_HOME=/disk-samsung/freebsd-ports/databases/crate/work  HOME=/disk-samsung/freebsd-ports/databases/crate/work PATH=/disk-samsung/freebsd-ports/databases/crate/work/.bin:/home/yuri/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin NO_PIE=yes MK_DEBUG_FILES=no MK_KERNEL_SYMBOLS=no SHELL=/bin/sh NO_LINT=YES PREFIX=/usr/local  LOCALBASE=/usr/local  CC="cc" CFLAGS="-O2 -pipe -fno-omit-frame-pointer  -fstack-protector-strong -fno-strict-aliasing "  CPP="cpp" CPPFLAGS="-fno-omit-frame-pointer"  LDFLAGS=" -fstack-protector-strong " LIBS=""  CXX="c++" CXXFLAGS="-O2 -pipe -fno-omit-frame-pointer -fstack-protector-strong -fno-strict-aliasing -fno-omit-frame-pointer  "  MANPREFIX="/usr/local" BSD_INSTALL_PROGRAM="install  -s -m 555"  BSD_INSTALL_LIB="install  -s -m 0644"  BSD_INSTALL_SCRIPT="install  -m 555"  BSD_INSTALL_DATA="install  -m 0644"  BSD_INSTALL_MAN="install  -m 444" gradle  --gradle-user-home /tmp/gradle-crate --project-cache-dir /tmp/gradle-crate   --build-cache jar
Watching the file system is not supported on this operating system.
> Task :buildSrc:compileJava
> Task :buildSrc:compileGroovy NO-SOURCE
> Task :buildSrc:pluginDescriptors
> Task :buildSrc:processResources
> Task :buildSrc:classes
> Task :buildSrc:jar
> Task :buildSrc:assemble
> Task :buildSrc:pluginUnderTestMetadata
> Task :buildSrc:compileTestJava FROM-CACHE
> Task :buildSrc:compileTestGroovy NO-SOURCE
> Task :buildSrc:processTestResources
> Task :buildSrc:testClasses

> Task :buildSrc:test
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.codehaus.groovy.reflection.CachedClass (file:/usr/local/share/gradle/lib/groovy-all-1.3-2.5.12.jar) to method java.lang.Object.finalize()
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.reflection.CachedClass
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

[yurivict]

With gradle-6.8.3 and Java 15 it passes this point.

Thank you.

[LutzWeischerFujitsu]

OK, so you can close it. Thanks.