[BUG] @Data compilation fails with "cannot find symbol" on JDK 24/25, works on JDK 21

[ACANX]

Describe the bug
After upgrading to JDK 24 or JDK 25, Maven compilation fails for classes annotated with Lombok’s @DaTa annotation, throwing a "cannot find symbol" error. The same project compiles successfully when using JDK 21.

To Reproduce

1. Use a Java class with Lombok’s @Data annotation, for example:

   import lombok.Data;
   
    @Data
    public class EmailEntry {
    
        private EmailAccount sender;
    
        private EmailAccount to;
    
        private String name;
    
        private String subject;
    
        private List<String> tags;
    
        private String htmlContent;
    }

2. Compile the project with Maven under JDK 24 or JDK 25.

3. Observe the compilation error similar to:

[ERROR] /D:/Code/JavaCode/AModule/cf/cf-biz/src/main/java/com/amodule/cf/mail/aws/ses/AwsSes.java:[58,55] 找不到符号
  符号:   方法 getSender()
  位置: 类型为com.amodule.mail.aws.ses.model.EmailEntry的变量 entry
[ERROR] /D:/Code/JavaCode/AModule/cf/cf-biz/src/main/java/com/amodule/cf/mail/aws/ses/AwsSes.java:[60,68] 找不到符号
  符号:   方法 getTo()
  位置: 类型为com.amodule.mail.aws.ses.model.EmailEntry的变量 entry
[ERROR] /D:/Code/JavaCode/AModule/cf/cf-biz/src/main/java/com/amodule/cf/mail/aws/ses/AwsSes.java:[64,48] 找不到符号
  符号:   方法 getSubject()
  位置: 类型为com.amodule.mail.aws.ses.model.EmailEntry的变量 entry
[ERROR] /D:/Code/JavaCode/AModule/cf/cf-biz/src/main/java/com/amodule/cf/mail/aws/ses/AwsSes.java:[69,56] 找不到符号
  符号:   方法 getHtmlContent()
  位置: 类型为com.amodule.mail.aws.ses.model.EmailEntry的变量 entry

Expected behavior

The project should compile successfully with Lombok annotations under JDK 24/25, as it does under JDK 21.

Version info (please complete the following information):

• Lombok Version: 1.18.40/1.18.42
• Maven Version: 3.8.6
• JDK Version: 24/25 (failing), 21 (working)
• Operating System: Windows 11

Additional context

• This issue may be related to changes in the JDK internal APIs or the way Lombok generates code for newer JDK versions.
• Downgrading to JDK 21 resolves the issue, confirming the problem is specific to JDK 24/25.

Additional Information:

[ePex]

I was trying to upgrade my SpringBoot with Lombok projects to 25 today and stepped on this issue now. So to confirm, this simple example doesn't compile.

Error

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.13.0:compile (default-compile) on project lombok-jdk25: Compilation failure: Compilation failure: 
[ERROR] /Users/philippholz/Projects/lombok-jdk25/src/main/java/de/philwood/Main.java:[14,20] cannot find symbol
[ERROR]   symbol:   class ResultBuilder
[ERROR]   location: class Main.Result

Code (Main.java)

import lombok.Builder;

import lombok.Value;

void main() {

}

@Value
@Builder
class Result {

    BigDecimal value;

    private static ResultBuilder ofDefault() {
        return Result.builder().value(BigDecimal.ONE);
    }
}

POM

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>de.philwood</groupId>
    <artifactId>lombok-jdk25</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>25</maven.compiler.source>
        <maven.compiler.target>25</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.42</version>
        </dependency>
    </dependencies>

</project>

Versions

Apache Maven 3.9.11 (3e54c93a704957b63ee3494413a2b544fd3d825b)
openjdk 25 2025-09-16 LTS
macOS 26.0 (25A354)

[dmarcelino]

I've been hit by the same issue whilst updating a project from java 17 to java 25. I can confirm that compiling with Java 21 works but not java 25.

[Rawi01]

You usually get this output if lombok is not enabled. Since JDK23 you have to either enable annotation proccession (-proc:full) or add lombok to your annotation processing path.

Check out the install guide for maven: https://projectlombok.org/setup/maven.

[ACANX]

You usually get this output if lombok is not enabled. Since JDK23 you have to either enable annotation proccession (-proc:full) or add lombok to your annotation processing path.

Check out the install guide for maven: https://projectlombok.org/setup/maven.

After adding the Lombok annotation configuration in the maven-compiler-plugin settings, the issue was resolved and the project can compile normally.

 <annotationProcessorPaths>
		<path>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version>1.18.42</version>
		</path>
 </annotationProcessorPaths>

[silviuburceadev]

Another approach is to use -proc:full as compiler argument.