Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass

Question

currently i follow course video from this youtube:https://www.youtube.com/watch?v=BHoiNd64w0c&list=PLQag1tT77Ben3dupVMgYtoi_PVVQVRdD6&index=13
everything works fine, i run my project by clicking play button in eclipse, a little different by instructor because he used sts tool. But the error happen when trying to right click > run as > maven install
based on this question How to fix "Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass?, im already used the newer spring version. Here's my pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.7</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>java-login-security</groupId>
    <artifactId>login-system</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>login-system</name>
    <description>login system</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jasper</artifactId>
            <version>9.0.70</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

and here more error log:

 .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.7.7)

2023-01-14 12:19:00.834  INFO 2373 --- [           main] j.l.LoginSystemApplicationTests          : Starting LoginSystemApplicationTests using Java 17.0.4.1 on dna with PID 2373 (started by dna in /media/dna/data/koding/java/login-system)
2023-01-14 12:19:00.835  INFO 2373 --- [           main] j.l.LoginSystemApplicationTests          : No active profile set, falling back to 1 default profile: "default"
2023-01-14 12:19:01.333  INFO 2373 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2023-01-14 12:19:01.380  INFO 2373 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 41 ms. Found 1 JPA repository interfaces.
2023-01-14 12:19:01.530 ERROR 2373 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.cglib.core.CodeGenerationException: java.lang.reflect.InaccessibleObjectException-->Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @78dd667e
    at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:598) ~[spring-core-5.3.24.jar:5.3.24]
    at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:363) ~[spring-core-5.3.24.jar:5.3.24]
// ...more error log here...

my java version:

dna@dna:/$ java -version
openjdk version "17.0.5" 2022-10-18
OpenJDK Runtime Environment (build 17.0.5+8-Ubuntu-2ubuntu122.04)
OpenJDK 64-Bit Server VM (build 17.0.5+8-Ubuntu-2ubuntu122.04, mixed mode, sharing)

[update] you can check my project here: https://github.com/dhanyn10/java/tree/main/login-system

Answer 1

I had the same issue. It was because my project was written in Java 8 but I tried to start in Java 17. I just changed the configuration for Build&Run in IntelliJ from SDK 17 to the correct Java Version 8 and it worked. Maybe you used another Java version for building the project in IntelliJ.

Here's the configuration screenshot.

Answer 2

It seems a different solution can be to use this JVM option to open up the java.lang package for reflection:

--add-opens java.base/java.lang=ALL-UNNAMED