java: log cannot be resolved

Question

i meet a problem I use

IntelliJ IDEA 2017.3.1 
Build #IU-173.3942.27, built on December 11, 2017
JRE: 1.8.0_111-b14 amd64
JVM: Java HotSpot(TM) 64-Bit Server VM by Oracle Corporation
Windows 7 6.1

Error:(16, 10) java: log cannot be resolved

import lombok.extern.slf4j.Slf4j;
import org.junit.Test;


@Slf4j
public class LogTest {

    @Test
    public void testSlf4j(){
         log.info("测试 lombok slf4j logback");
    }

}

i had config Settings -> Build, Execution, Deployment -> Compiler -> Annotation Enable annotation processing

Settings -> Other Settings -> Lombok

    <!-- SLF4J -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.21</version>
    </dependency>
    <!-- Logback -->
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-core</artifactId>
        <version>1.1.3</version>
    </dependency>
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.1.3</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>log4j-over-slf4j</artifactId>
        <version>1.7.21</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.16.20</version>
    </dependency>

Could you please attachscreenshot with your Annotation Processor settings? Have you tried to run "File | Invalidate Caches" and "Refresh" from maven tool window? — y.bedrov, Jan 12 '18 at 09:26
For Intellij + Maven, try this https://stackoverflow.com/a/59090028/4057038 — Meena Chaudhary, Nov 28 '19 at 13:34

score 4 · Answer 1 · answered Apr 27 '21 at 11:04

4

I faced the same issue. A simple maven update helped me. You can try the following from command line:

mvn clean install -U

and then run your application

mvn spring-boot:run

answered Apr 27 '21 at 11:04

Antara Datta

1,909
2
12
16

score 2 · Answer 2 · answered Jan 12 '18 at 20:31

2

Probably you have to install Lombok Plugin so that IDEA would know what does that annotation means.

answered Jan 12 '18 at 20:31

streetturtle

5,472
2
25
43

score 2 · Answer 3 · answered Jan 17 '21 at 06:32

2

In addition to making sure you have the Lombok Plugin installed you also need annotation processing enabled.

After that I started to get this error and I needed to do a 'Build > Rebuild Project' to shake it off.

answered Jan 17 '21 at 06:32

simbo1905

6,321
5
58
86

score 1 · Answer 4 · edited Jul 27 '21 at 18:45

1

I had the same problem, in my case, the compiler configuration was wrong because the Ajc compiler was selected, so I change it to Javac instead.

Config path:

File > Settings > Build, Execution, Deployment > Compiler > Java Compiler

edited Jul 27 '21 at 18:45

Ole Pannier

3,208
9
22
33

answered Jul 27 '21 at 15:31

Glen Flores

11
1

score 0 · Answer 5 · answered Jan 15 '18 at 09:42

0

Do you have a lombok.config file that renames to log variable to something else using lombok.log.fieldName = xxx?

answered Jan 15 '18 at 09:42

Roel Spilker

32,258
10
68
58

And where should this configuration be set? It is not explained very well in the docs – Urosh T. Aug 23 '18 at 10:47

score 0 · Answer 6 · answered Aug 19 '19 at 06:18

0

It may be related to @Slf4j and may be you are using any latest version of project lombok (1.18.x)+ try to install the earlier versions like 1.16.x which supports @Slf4j.

And then restart eclipse and rebuilt the project.

answered Aug 19 '19 at 06:18

basee

131
1
4

score 0 · Answer 7 · answered Jan 13 '23 at 13:12

0

Exit from the IDE.
C:\Users{pcname}.m2\repository\org\projectlombok In this location delete all files.
Download Lombok jar from https://projectlombok.org/download , and start IDE.
Specify your IDE path like this.. Image to specify ide path
Start your IDE.

answered Jan 13 '23 at 13:12

Ajay Suryawanshi

1
1

1

When I looked at the image, it felt more like Eclipse. The question specifically states the person is using Intellij. – gaoagong Jan 13 '23 at 21:36

score -1 · Answer 8 · answered Feb 10 '22 at 11:58

1.Go to https://projectlombok.org/ 2.Download JAR file. 3.Run JAR file. Usually double-clicking JAR file is enough. 4.In the Lombok installation screen, make sure that your Spring Tool Suite instance is listed. 5.Click Install/Update, then Quit Installer. 6.Open Spring Tool Suite, go to About Spring Tool Suite. The large area that contains the version number should have the Lombok version listed at the bottom. You might have to scroll, even though there is no scroll bar.

All the Best.

java: log cannot be resolved

8 Answers8