Set Java version to 16

.gitlab-ci.yml

@@ -65,7 +65,7 @@ build_extension:
     - cd vollt
     - gradle jar
     - cd ../private-rows-extension
-    - JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64 mvn clean package
+    - JAVA_HOME=/usr/lib/jvm/java-16-openjdk-amd64 mvn clean package
   artifacts:
     paths:
       - private-rows-extension/target/private-rows-extension-*.jar

private-rows-extension/Dockerfile-build-env

 FROM gradle:6-jdk8
-RUN apt-get update && apt install -y openjdk-17-jdk maven
+RUN apt-get update && apt install -y openjdk-16-jdk maven

private-rows-extension/pom.xml

@@ -7,8 +7,8 @@
     <packaging>jar</packaging>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven.compiler.source>14</maven.compiler.source>
-        <maven.compiler.target>14</maven.compiler.target>
+        <maven.compiler.source>16</maven.compiler.source>
+        <maven.compiler.target>16</maven.compiler.target>
     </properties>
     <dependencies>
         <dependency>