Vscode-java: False positives problems (when using Lombok)

[herrmanno]

When using this plugin with a lombok-project the plugin determines many problems (e. g. for missing getters and setters) that disappear when the corresponding file is opened.

Environment

• Operating System: macOS
• JDK version: 1.8.0_102
• Visual Studio Code version: 1.20.1
• Java extension version: 0.20.0

Steps To Reproduce

1. Configure lombok support for this plugin, as described here
2. Open a project that uses lombok annotations like @Getter or @Data

Sample Project

Unfortunately, I cannot submit the affected project.
The important bits are:

<!-- pom.xml -->
<dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <scope>provided</scope>
</dependency>

// License.java
@Data
public class License {
    private String serial;
}

Java Language Server log

!SESSION 2018-03-06 07:59:11.945 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.8.0_102
java.vendor=Oracle Corporation
BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=de_DE
Command-line arguments:  -data /Users/oliverherrmann/Library/Application Support/Code/User/workspaceStorage/d8ec444f7205bbe5fb9c8b70109bb494/redhat.java/jdt_ws

!ENTRY org.eclipse.jdt.ls.core 1 0 2018-03-06 07:59:14.658
!MESSAGE class org.eclipse.jdt.ls.core.internal.JavaLanguageServerPlugin is started

!ENTRY org.eclipse.jdt.ls.core 1 0 2018-03-06 07:59:14.992
!MESSAGE Main thread is waiting


{ ... }


!ENTRY org.eclipse.jdt.ls.core 4 0 2018-03-06 08:00:20.767
!MESSAGE Error occured while building workspace. Details: 
message: The method getSerial() is undefined for the type License;code: 67108964
message: The method getExportChannels() is undefined for the type Project;code: 67108964
message: The method getEditions() is undefined for the type Project;code: 67108964

Current Result

A Problem “The method getSerial() is undefined for the type License“ is listed in the problems view. When opening the corresponding file by clicking on the entry the problem disappears after a few seconds.
This behavior is reproducable when restarting vs code.

Expected Result

No problem “The method getSerial() is undefined for the type License“ is listed in the problems view.

[snjeza]

I can't reproduce the issue.
I have used the attached project and the following settings:

"java.jdt.ls.vmargs": "-javaagent:/home/snjeza/.m2/repository/org/projectlombok/lombok/1.16.20/lombok-1.16.20.jar -Xbootclasspath/a:/home/snjeza/.m2/repository/org/projectlombok/lombok/1.16.20/lombok-1.16.20.jar -noverify -Xmx1G -XX:+UseG1GC -XX:+UseStringDeduplication",

mytest.zip

[GabrielBB]

This bug is still happening, please see: Problems list still show errors of undefined for getters or setters. The issue opener resolved it doing this: https://github.com/GabrielBB/vscode-lombok/issues/13#issuecomment-440981551 , but that workaround doesn't work for others

[snjeza]

@GabrielBB could you attach a sample project?

[YongJieYongJie]

Here's how I managed to solve the problem:

1. Make sure everything else works:
   
   
   
   • I.e., even though the errors show up in the PROBLEMS list, once you navigate to the specific file, the errors for that file disappears.
   
   
   • You will likely need to install the Lombok Annotations Support for VSCode extension for this.
   
   
2. Run Java: Clean the Java language server workspace from Command Palette.
3. Run Java: Import Java projects in workspace from Command Palette.
4. The problem is fixed (at least for me).
   
   
   
   • Do note however that you might still see a huge number of warnings / info messages.
   
   

[EuniceB]

I tried @YongJieYongJie 's solution but the problems appeared again as soon as I compiled the project using maven.