Support for CGLIB BeanCopier utility on JDK 17 still error

[SuperEdison]

springframework.version 5.3.21 jdk.version 17

old issues I find this error still happening that is fault way to use? public static void main(String[] args) { BeanCopier beanCopier = BeanCopier.create(A.class, B.class, false); } Exception in thread "main" 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 @32cf48b7 at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:589) at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:363) at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:110) at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:108) at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54) at java.base/java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:264) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java) at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61) at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34) at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:134) at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:319) at org.springframework.cglib.beans.BeanCopier$Generator.create(BeanCopier.java:98) at org.springframework.cglib.beans.BeanCopier.create(BeanCopier.java:52) at club.edm.bscwallet.server.BscWalletApplication.main(BscWalletApplication.java:17) Caused by: 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 @32cf48b7 at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354) at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297) at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199) at java.base/java.lang.reflect.Method.setAccessible(Method.java:193) at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:553) ... 13 more

    public static void main(String[] args) {
        BeanCopier beanCopier = BeanCopier.create(A.class, B.class, false);
        System.out.println(beanCopier);
        A a = new A();
    }

    static public class A {

    }

    static public class B {

    }

@jhoeller

[livk-cloud]

This didn't happen with any errors,I tried using spring-core 6.0.0M4 and spring-core 5.3.21,didn't get any errors

public class AppTest {

    @Test
    public void test() {
        BeanCopier copier = BeanCopier.create(A.class, B.class, false);
        System.out.println("copier:" + copier);
    }
}

class A {

}

class B {

}

[SuperEdison]

这没有发生任何错误，我尝试使用 spring-core 6.0.0M4 和 spring-core 5.3.21，没有收到任何错误

public class AppTest {

    @Test
    public void test() {
        BeanCopier copier = BeanCopier.create(A.class, B.class, false);
        System.out.println("copier:" + copier);
    }
}

class A {

}

class B {

}

because your class not public class, you can try create public class A and B

[livk-cloud]

这没有发生错误，我试用使用 spring-core 6.0.0M4 和 spring-core 5.3.21，没有收到任何错误

public class AppTest {

    @Test
    public void test() {
        BeanCopier copier = BeanCopier.create(A.class, B.class, false);
        System.out.println("copier:" + copier);
    }
}

class A {

}

class B {

}

因为您的课程不是公共课程，您可以尝试创建公共课程 A 和 B

Obviously there is no problem

spring6.0.0-M4 result

spring5.3.21 result

[SuperEdison]

这没有发生错误，我试用使用 spring-core 6.0.0M4 和 spring-core 5.3.21，没有收到任何错误

public class AppTest {

    @Test
    public void test() {
        BeanCopier copier = BeanCopier.create(A.class, B.class, false);
        System.out.println("copier:" + copier);
    }
}

class A {

}

class B {

}

因为您的课程不是公共课程，您可以尝试创建公共课程 A 和 B

Obviously there is no problem

spring6.0.0-M4 result

spring5.3.21 result

so, i wanna know that you add some param? there are pic to tell you my env and spring.verison.

[livk-cloud]

class A and class B is empty I am using oracle jdk17.0.2 spring version has been said before

[SuperEdison]

class A and class B is empty

I am using oracle jdk17.0.2

spring version has been said before

can you show me the A class code ?

[livk-cloud]

A类和B类为空

我正在使用 oracle jdk17.0.2

spring 版本之前已经说过了

你能告诉我A类代码吗？

[SuperEdison]

A类和B类为空

我正在使用 oracle jdk17.0.2

spring 版本之前已经说过了

你能告诉我A类代码吗？

i had change oracle jdk17,still error. i have no idea to solve it. do you add --add-opens java.base/java.lang=ALL-UNNAMED param?

[livk-cloud]

A类和B类为空

我正在使用 oracle jdk17.0.2

spring 之前已经知道了

你能告诉我一个类代码吗？

我改变了oracle jdk17，仍然错误。 我不知道解决它。 你添加--add-opens java.base/java.lang=ALL-UNNAMED 参数吗？

No, I use the default parameters of the idea, I think you should use @Test instead of the Main method

[SuperEdison]

i try many way to solve this problem, but any way had fail

[funky-eyes]

i try many way to solve this problem, but any way had fail

me too

[mazhewei]

Same issue. Here is minimize steps:

1. create empty springboot project using spring initializr(in IDEA) Project SDK: openjdk 17.0.3 Java: 17 SpringBoot Version 2.7.3 SpringFramework Version 5.3.22
2. create two entity class, Person.class / PersonVO.class for example

public class Person {
    String name;
    Integer age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

import java.util.List;

public class PersonVO extends Person {
    List<String> hobbies;

    public List<String> getHobbies() {
        return hobbies;
    }

    public void setHobbies(List<String> hobbies) {
        this.hobbies = hobbies;
    }
}

3. use BeanCopier

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cglib.beans.BeanCopier;

@SpringBootApplication
public class BeanCopierDemoApplication {
    private static final Log logger = LogFactory.getLog(BeanCopierDemoApplication.class);

    public static void main(String[] args) {
        PersonVO personVO = testBeanCopy();
        logger.info(personVO);
        SpringApplication.run(BeanCopierDemoApplication.class, args);
    }

    public static PersonVO testBeanCopy() {
        Person person = new Person();
        person.setName("nico");
        person.setAge(18);
        PersonVO personVO = new PersonVO();
        final BeanCopier beanCopier = BeanCopier.create(Person.class, PersonVO.class, false);
        beanCopier.copy(person, personVO, null);
        personVO.setHobbies(null);
        return personVO;
    }
}

4. start springboot application and error occurred

Exception in thread "main" 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 @7920ba90
	at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:598)
	at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:363)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:110)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:108)
	at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61)
	at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:134)
	at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:319)
	at org.springframework.cglib.beans.BeanCopier$Generator.create(BeanCopier.java:98)
	at org.springframework.cglib.beans.BeanCopier.create(BeanCopier.java:52)
	at com.example.beancopierdemo.BeanCopierDemoApplication.testBeanCopy(BeanCopierDemoApplication.java:24)
	at com.example.beancopierdemo.BeanCopierDemoApplication.main(BeanCopierDemoApplication.java:14)
Caused by: 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 @7920ba90
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
	at java.base/java.lang.reflect.Method.setAccessible(Method.java:193)
	at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:552)
	... 13 more

In my case, to resolve it, just add vm options "--add-opens java.base/java.lang=ALL-UNNAMED"

So i think maybe it's a compatibility issue with CGLIB? If there are other solutions or information, that will be very grateful.

[invzbl3]

@mazhewei, thank you, your post was very helpful for me!

[harryssuperman]

I had a similar problem and after taking the answer from @mazhewei and @invzbl3 got it working.

The main problem here could be a Intellij-Settings-Problem.

For me following Setting for the argLine for the Tests with Maven was disabled.

So when i runned the Test in the console with mvn clean install Test was ok but into IntelliJ was failed.

Then i wrote in the pom.xml some configuration for the surefire plugin:

<plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>${maven-surefire-plugin.version}</version>
                    <configuration>
                        <argLine>
                            --add-opens java.base/java.lang=ALL-UNNAMED
                            --add-opens java.base/java.lang.invoke=ALL-UNNAMED
                            --add-opens java.base/java.lang.reflect=ALL-UNNAMED
                            --add-opens java.base/java.util=ALL-UNNAMED
                            --add-opens java.base/java.text=ALL-UNNAMED
                            --add-opens java.desktop/java.awt.font=ALL-UNNAMED
                            --add-opens java.desktop/java.awt.geom=ALL-UNNAMED
                            @{surefireArgLine}
                        </argLine>
                    </configuration>
                </plugin>

In my case, i have more package/module opened because of another tests but the point is after doing this i had not to write the add-opens package/module for the single test.

Maybe @SuperEdison could try this solution and if all is fine issue could be close.

[ccwxl]

我也遇到这种问题. 加了--add-opens也不好使.

[funky-eyes]

--add-opens java.base/java.lang=ALL-UNNAMED adding this parameter isn't actually a solution and doesn't mean JDK17 is actually supported

[SuperEdison]

--add-opens java.base/java.lang=ALL-UNNAMED adding this parameter isn't actually a solution and doesn't mean JDK17 is actually supported

yes, i agree

[johnny2002]

Same problem here. add a mark to be notified.

[johnny2002]

BTW, I am using the latest version spring 6.0.12

[snicoll]

This is a cglib issue, not a spring issue. Please report that against the cglib project.

[SuperEdison]

This is a cglib issue, not a spring issue. Please report that against the cglib project.

so could the spring cancel cglib support?

[jhoeller]

It seems this is actually an issue with our context class patch which only works for non-public classes but not for public classes. I got a fix ready to be rolled into 6.0.14, to be backported to 5.3.31 as well.

That said, please note that Spring's repackaged CGLIB fork is not meant to be used directly. Its primary role is supporting Spring's AOP framework and related core container functionality. We do not use CGLIB's BeanCopier ourselves and therefore only support it on a best-effort basis.

[funky-eyes]

@jhoeller This is very good, looking forward to the official release of this version!

[jhoeller]

This is available in the latest 6.0.14 snapshot now and will be available in the upcoming 5.3.31 snapshot in a few minutes (which can be obtained from repo.spring.io). Please give either of those a try ahead of our release date in November so that we have confidence that the fix works for good now. Alternatively, you could also patch a local Spring Framework setup with the latest org.springframework.cglib.beans.BeanCopier class; it is generally sufficient to just test the latest spring-core.jar for this fix.

[SuperEdison]

It seems this is actually an issue with our context class patch which only works for non-public classes but not for public classes. I got a fix ready to be rolled into 6.0.14, to be backported to 5.3.31 as well.

That said, please note that Spring's repackaged CGLIB fork is not meant to be used directly. Its primary role is supporting Spring's AOP framework and related core container functionality. We do not use CGLIB's BeanCopier ourselves and therefore only support it on a best-effort basis.

yep, spring could consider if that's deleted the cglib's 'BeanCopier' or using another way to support it

[jhoeller]

For the time being, we are trying to make BeanCopier work. If we ever end up in a situation where some CGLIB classes cannot be maintained on recent JDKs anymore, we'd mark them as deprecated... but that does not seem to be necessary yet.

That said, I would appreciate early testing against 6.0.14 / 5.3.31 snapshot builds (from https://repo.spring.io) to verify that BeanCopier actually works for you now, making sure that our November releases are properly resolving this issue.