SpringBoot Spring Boot with Java 24

I get the following errors when upgrading to Java 24, with my Spring Boot Webflux application

Is this normal, or a development point?

WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
WARNING: sun.misc.Unsafe::allocateMemory has been called by io.netty.util.internal.PlatformDependent0$2 (file:/Users/sachin/.gradle/caches/modules-2/files-2.1/io.netty/netty-common/4.1.119.Final/2f7c360b03c0aceab7efc1f7c2b75274f0f35909/netty-common-4.1.119.Final.jar)
WARNING: Please consider reporting this to the maintainers of class io.netty.util.internal.PlatformDependent0$2
WARNING: sun.misc.Unsafe::allocateMemory will be removed in a future release


WARNING: A restricted method in java.lang.System has been called
WARNING: java.lang.System::loadLibrary has been called by io.netty.util.internal.NativeLibraryUtil in an unnamed module (file:/Users/sachin/.gradle/caches/modules-2/files-2.1/io.netty/netty-common/4.1.119.Final/2f7c360b03c0aceab7efc1f7c2b75274f0f35909/netty-common-4.1.119.Final.jar)
WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module
WARNING: Restricted methods will be blocked in a future release unless native access is enabled

plugins {
    id("org.springframework.boot") version "3.4.5"
    id("io.spring.dependency-management") version "1.1.7"
    kotlin("jvm") version "2.2.0-RC"
    kotlin("plugin.spring") version "2.2.0-RC"
//  id("org.graalvm.buildtools.native") version "0.10.2"
}

group = "com.myapp"
version = "0.0.1-SNAPSHOT"

java {
    sourceCompatibility = JavaVersion.VERSION_24
}

kotlin {
    compilerOptions {
        freeCompilerArgs.addAll("-Xjsr305=strict")
        jvmTarget = JvmTarget.JVM_24
    }
}

// Configuration for the 'bootRun' task
tasks.withType<BootRun> {
    // Set JVM arguments for running the application via 'gradle bootRun'
    jvmArgs = listOf(
        "--enable-native-access=ALL-UNNAMED",
        // --- Garbage Collector Selection ---
        // Choose ONE of the following GC options. G1 is often the default.
        // Shenandoah GC (Low Pause Time) - Requires JDK 11+
        "-XX:+UseShenandoahGC",
        // G1 GC (Default in many recent JDKs, good balance)
        // "-XX:+UseG1GC",
        // ZGC (Low Pause Time, Scalable) - Requires JDK 11+
        // "-XX:+UseZGC",

        // --- Memory Settings (Example) ---
        // Set initial and maximum heap size. Adjust values as needed.
        "-Xms512m", // Initial heap size
        "-Xmx2048m", // Maximum heap size

        // --- Other Potential Flags (Use with caution and testing) ---
        // Example: Enable String Deduplication (for G1 GC, reduces heap usage for duplicate Strings)
        // "-XX:+UseStringDeduplication",

        // Example: Aggressive Optimizations (can sometimes be unstable)
        // "-XX:+AggressiveOpts",

        // Example: GC Logging (useful for tuning/debugging)
        // Modern format (JDK 9+)
        "-Xlog:gc*:file=build/gc-bootrun.log:time,level,tags:filecount=5,filesize=10m"
        // Older format
        // "-XX:+PrintGCDetails",
        // "-XX:+PrintGCDateStamps",
        // "-Xloggc:build/gc-bootrun.log",
        // "-XX:+UseGCLogFileRotation",
        // "-XX:NumberOfGCLogFiles=5",
        // "-XX:GCLogFileSize=10M",
    )
    // Ensure you are running with a Java 24+ JDK for bootRun
    javaLauncher = javaToolchains.launcherFor {
        languageVersion = JavaLanguageVersion.of(24)
    }
}

Comment From: wilkinsona

This has nothing to do with Spring Boot. It's a general warning produced by Java 24 when code uses sun.misc.Unsafe or java.lang.System. Before opening an issue, please take the time to read the warning message which says "please consider reporting this to the maintainers of class io.netty.util.internal.PlatformDependent0$2".