Can't compile project when I'm using Lombok under IntelliJ IDEA

Question

I'm trying to use Lombok in my project that I'm developing using IntelliJ IDEA 11.

I've installed 3rd-party plugin for IDEA and it seems working fine because IDEA sees all autogenerated methods/fields.

So I have a class that uses Slf4j. I annotated it like this

import lombok.extern.slf4j.Slf4j;

@Slf4j
public class TestClass
{
    public TestClass()
    {
        log.info("Hello!");
    }
}

But when I build my project compiler spits: cannot find symbol variable log.

Could you please tell me what I'm missing here?

Update: It turned out it's RequestFactory annotation process that fails.

input files: {com.zasutki.courierApp.server.TestServlet, com.mine.courierApp.server.model.DatastoreObject}

annotations: [javax.inject.Singleton, javax.inject.Inject, lombok.Getter, lombok.Setter, com.googlecode.objectify.annotation.Id, com.googlecode.objectify.annotation.OnSave]

Processor com.google.web.bindery.requestfactory.apt.RfValidator matches [lombok.Getter, com.googlecode.objectify.annotation.Id, javax.inject.Inject, lombok.Setter, com.googlecode.objectify.annotation.OnSave, javax.inject.Singleton] and returns false.

cannot find symbol variable log

Any ideas on workarounds?

Update2: Perhaps it's not something readers want to hear but I ended up switching to Scala.

Solution 1

I have fixed it in IDEA 12 by setting check box Enable annotation processing in:

Settings -> Compiler -> Annotation Processors

For IDEA 2016.2:

Preferences... > Build, Execution, Deployment > Compiler > Annotation Processors

After enabling, run Build -> Rebuild Project to have annotations recognized and eliminate errors.

---

For IDEA 2019.2.1, depending on how the project is configured, installing the Project Lombok plugin may not be sufficient. Here is another way to use Project Lombok with IntelliJ IDEA:

1. Visit https://projectlombok.org/download
2. Download the JAR file into the project lib directory (e.g., $HOME/dev/java/project/libs).
3. Start the IDE.
4. Click File 🠖 Settings.
5. Expand Build, Execution, Deployment 🠖 Compiler 🠖 Annotation Processors.
6. Ensure Enable annotation processing is checked.
7. Ensure Store generates sources relative to is selected based on the project's module settings (if Module output directory doesn't work, come back and try the other setting).
8. Click Apply.
9. Click Plugins.
10. Click Marketplace.
11. Set search field to: lombok
12. Install Lombok.
13. Click OK.
14. Restart the IDE if prompted.
15. Click File 🠖 Project Structure.
16. Select Libraries.
17. Click the + symbol to add a new project library (or press Alt+Insert).
18. Select Java.
19. Set the path to: $HOME/dev/java/project/libs/lombok.jar
20. Click OK.
21. Select the modules to apply.
22. Click OK.
23. Optionally, rename lombok to Project Lombok 1.18.8.
24. Click OK.

The project can now import from the lombok package and use Project Lombok annotations (e.g., lombok.Setter and lombok.Getter).

Solution 2

Picture representation of resolving this issue.

First enable annotation processors and try. This may or may not work.

Post that, you can install the lombok plugin from intellij, (After installation Intellij will restart to enable the plugin, so make sure you save your work.(Intellij does save all the changes before restart, just to be on the safe side.)) screenshot below:

Solution 3

Enabling annotation processing will make it work

But if you are on a Mac, make sure you enable annotation processing(tick the checkbox) from both the places available.

1.) Intellij Idea -> Preferences -> Compiler -> Annotation Processors

2.) File -> Other Settings -> Default Settings -> Compiler -> Annotation Processors

Solution 4

1. Make sure it's added correctly to your project.

example for Gradle:

 dependencies {
     compileOnly 'org.projectlombok:lombok:1.18.8'
     annotationProcessor 'org.projectlombok:lombok:1.18.8'
     ...
 }

2. Install Lombok plugin for your IDE
3. Check "Enable annotation processing" checkbox in IDE (IntellijIdea), have no idea if there is anything like this for other IDEs like Eclipse.

Solution 5

in the latest Gradle version you should use annotationProcessor:

compileOnly 'org.projectlombok:lombok'
annotationProcessor 'org.projectlombok:lombok:1.18.8'

View more solutions

Comments

[Nowaker]

Errors appear even without the plugin. I am not able to run tests of a project if Lombok is in my pom.xml dependencies.

[Error Hunter]

there is another answer stackoverflow.com/a/63632563/5410940

[expert]

It turned out it fails inside annotation processor. I updated my question with output log.

[Sanghyun Lee]

I also had the same issue. Try change the version of Lombok so that IntelliJ download the dependency again.

[BeepDog]

Still had to do this even with the latest intellij 15.0.2

[Srikanta]

Still present in 15.0.4. I also had to update the Lambok version to the latest and change the Java compiler to JAVAC. Then do a rebuild of the project

[Alex]

I had to stop my Win10 for a freeze issue (pilot crash) and IntelliJ was opened. At restart, I guess idea files in my project directory has been altered (workspace.xml) and after that I couldn't generate my getters/setters methods via lombok. "Canno't find symbol" at build time. I wrestled a bit to spot the origin of the issue.

[Jan Kubovy]

Don't forget to set annotation processor: lombok.launch.AnnotationProcessorHider$AnnotationProcessor for both maven-compiler-plugin and Idea (Settings -> Compiler -> Annotation Processors)

[CodeMonkey]

This plugin can be installed in Settings/Plugins menu of Intellij. Make sure you have the latest plugin installed. Upgrading to latest plugin worked for me.

[Ray Hunter]

Still must do in IntelliJ 2016.1.3 :) You have to set the 2 annotation processors. Such a pain when you forget about it!

[maksimov]

This isn't working for me in 2016.2. Maven web project. The only thing that worked was installing the lombok plugin.

[Neikius]

Idea 16.2.2 + gradle + installed lombok plugin. I could run project without this when using the gradle runscript (from idea). If I wanted to run directly (since this is the only way I know to make code hotswap work) I had to enable annotation processing. Guess idea does not automatically fully configure project and annotations don't get processed despite the plugin?

[Sukesh Kotian]

Still must do in IntelliJ 2016.3 :)

[arcuri82]

even by activating in both places, IntelliJ 2016.3.2 still fails to compile with Lombok 1.16.12 :(

[lreeder]

Worked for me in IDEA 2017.01. Installing Lombok worked for Intellisense, but not for compilation until Annotation Processor was enabled.

[Hans]

I also had to invalidate the cache and restart before Intellij stopped complaining.

[TYL]

thank you.. I got the same problem. I forgot to install the plugin before I set the Annotation configuration :)

[Antonio Saco]

For IDEA 2017.3.2, re-installing the Lombok plugin (Uninstall, restart, Install and restart) worked for me.

[realPK]

What version of IntelliJ are you using? Also, what JDK version?

[Carlos Alberto Schneider]

After doing it, I still needed to remove and reimport the project as a maven project

[Beezer]

Without the plugin the above is irrelevant. Install the Lombok plugin AS WELL AS the good advice in the answer above :=). Also applies to Intellij 2018.2 btw.

[user5365075]

In my case, I wasn't seeing a warning message before the errors, saying that plugin Lombok had been disabled because of delegating issues. Turned out Idea was trying to use Java 11 to compile. After downgrading to Java 1.8, everything worked fine.

[ch1ll]

this, this, and a thousand times this. Thank you, I was stuck for one hour

[Stevers]

Came here for the 2019 version update... thank you so much.

[Gryk]

in addition to above steps, I had to include the following lines to build.gradle: annotationProcessor "org.projectlombok:lombok:1.18.8" testAnnotationProcessor("org.projectlombok:lombok:1.18.8")

[Eric Tan]

yep, you are right, we should check the build config first, then IDE setting. thanks a heap!

[thenakulchawla]

I don't see Default Settings in Other Settings in IntelliJ. Are these still present. I am using the Ultimate edition - version11.03

[doctorram]

This is the only thing that actually worked! Why it has only 13 likes?!

[0x01Brain]

Did you had maven or gradle? I am having a problem making lombok work for a multi module project. I keep getting the error: Error:java: Annotation processing is not supported for module cycles. Please ensure that all modules from cycle [module-core,module-utils] are excluded from annotation processing

[Hearen]

@0x01Brain I was using maven at that time, but now using gradle instead. As for your question, I do hope you can start a new specific question to describe the details and there are lots of experts out there will help you ;)

[0x01Brain]

never mind I got it to compile now, thanks. I had some conflict in depedencies module-core was imported in utils module and utils module was imported in core module which made a conflict.

[Pavlo Zvarych]

I had to add requires org.slf4j; to mole-info.java also

[Urosh T.]

Thanks, worked like a charm for 2020.3 CE!

[Devon]

This solution should be much more upvoted. I was investigating this for hours, and this was the only thing that worked.

[Stevers]

God i forgot Gradle added annotationProcessor in newer versions. Thank you for your answer.

[vikas tiwari]

After going throgh so many solutions , this worked for me. After adding "annotationProcessor" , everything started working fine.

[Caio Santos]

It worked for me. I use Kotlin DSL and my code is like this:dependencies { compileOnly("org.projectlombok:lombok:1.18.8") annotationProcessor("org.projectlombok:lombok:1.18.8") ... }

[Elyasaf755]

This is the correct answer. I didn't have 'annotationProcessor' defined in my build.gradle dependencies.

[pepe450]

Needed to do this on 2021.1.2

[KaraKaplanKhan]

@Gryk after adding your suggestion it worked in my application. Thank you.

[Duy Tran]

Thank you, this is best answer for saving me hours.

[Orlando Alfonso]

Awesome, yep the problem was on my gradle dependencies, thanks so much