"error: release version 17 not supported" when building a sample

[niekbouman]

When trying to compiling the transfer sample

./gradlew transfer:transfer-00-prerequisites:connector:build

I get a "release version 17 not supported" error, while I have openjdk v17 installed.

This is on linux, Fedora 40. I assume you support openjdk?

openjdk 17.0.12 2024-07-16
OpenJDK Runtime Environment (Red_Hat-17.0.12.0.7-2) (build 17.0.12+7)
OpenJDK 64-Bit Server VM (Red_Hat-17.0.12.0.7-2) (build 17.0.12+7, mixed mode, sharing)

Below is the error output of gradlew:

> Task :transfer:transfer-00-prerequisites:connector:compileJava FAILED
Caching disabled for task ':transfer:transfer-00-prerequisites:connector:compileJava' because:
  Build cache is disabled
Task ':transfer:transfer-00-prerequisites:connector:compileJava' is not up-to-date because:
  Task has failed previously.
The input changes require a full rebuild for incremental task ':transfer:transfer-00-prerequisites:connector:compileJava'.
Full recompilation is required because no incremental change information is available. This is usually caused by clean builds or changing compiler arguments.
Compiling with toolchain '/usr/lib/jvm/java-17-openjdk-17.0.12.0.7-2.fc40.x86_64'.
Log level has changed, stopping idle worker daemon with out-of-date log level.
Starting process 'Gradle Worker Daemon 2'. Working directory: /home/niek/.gradle/workers Command: /usr/lib/jvm/java-17-openjdk-17.0.12.0.7-2.fc40.x86_64/bin/java @/home/niek/.gradle/.tmp/gradle-worker-classpath10484686660222942000txt -Xmx512m -Dfile.encoding=UTF-8 -Duser.country=US -Duser.language=en -Duser.variant worker.org.gradle.process.internal.worker.GradleWorkerMain 'Gradle Worker Daemon 2'
Successfully started process 'Gradle Worker Daemon 2'
Started Gradle worker daemon (0.543 secs) with fork options DaemonForkOptions{executable=/usr/lib/jvm/java-17-openjdk-17.0.12.0.7-2.fc40.x86_64/bin/java, minHeapSize=null, maxHeapSize=null, jvmArgs=[], keepAliveMode=DAEMON}.
Compiling with JDK Java compiler API.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':transfer:transfer-00-prerequisites:connector:compileJava'.
> error: release version 17 not supported

Any idea how to deal with this error?

[niekbouman]

Okay, never mind.
I solved it myself by manually setting the JAVA_HOME env variable to the right jdk. There seemed to be a clash with a newer jdk that was also installed on my system.