Change Details

CI is broken with last Jenkins upgrade. Our agents still run under JRE 11, while Jenkins uses JRE 17 (Temurin-17.0.12+7). This creates the following issue when the primary Jenkins server tries to launch the agent: ``` Caused by: java.lang.UnsupportedClassVersionError: hudson/slaves/SlaveComputer$SlaveVersion has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0 at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:878) at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:470) ... 23 more ```

CI is broken with last Jenkins upgrade. Our agents still run under JRE 11, while Jenkins uses JRE 17 (Temurin-17.0.12+7). This creates the following issue when the primary Jenkins server tries to launch the agent: ``` Caused by: java.lang.UnsupportedClassVersionError: hudson/slaves/SlaveComputer$SlaveVersion has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0 at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:878) at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:470) ... 23 more ``` That affects the PHP agent. Checking rust_brown, Rust agent already uses OpenJDK 11. Those are based on jenkins-agent-barebone, already using OpenJDK 17.

CI is broken with last Jenkins upgrade. Our agents still run under JRE 11, while Jenkins uses JRE 17 (Temurin-17.0.12+7). This creates the following issue when the primary Jenkins server tries to launch the agent: ``` Caused by: java.lang.UnsupportedClassVersionError: hudson/slaves/SlaveComputer$SlaveVersion has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0 at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:878) at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:470) ... 23 more ``` That affects the PHP agent. Checking rust_brown, Rust agent already uses OpenJDK 11. Those are based on jenkins-agent-barebone, already using OpenJDK 17.