Building with Lombok s Slf4j and Intellij Cannot find symbol log

Question

I have a maven project that builds with no problems from the command line  However  when I build it with IntelliJ  I get the error   java  FileName java 89  cannot find symbol symbol    variable log   There is no log defined or imported in the java file  but there is a   Slf4j final public class FileName     statement before the class body which should define the log class   In the project structure window  classes for   Maven  org slf4j jcl-over-slf4j 1 6 1 Maven  org slf4j slf4j-api 1 6 6 Maven  org slf4j slf4j-log4j12 1 6 6 Maven  org slf4j slf4j-simple 1 6 6   are listed under libraries and are indicated as having been downloaded and available   Any idea why this would build with maven through the command line  but not through IntelliJ and how to resolve the issue

User · Answer

I might be ungraving a dead topic but a simple solution is to check in your dependencies (Maven's pom for exemple) if you are including logback-core and logback-classic.

Slf4j is just the interface, you need the concrete implementation behind it to work.

I've been tricked twice with IDEA messing it up, now I'm good to go :D

User · Answer

In Intellij version 2016  2017  enable Preferences -  Compiler -  Annotation Processors does not work for me   The following additional checkbox helps

User · Answer

I tried almost all of the mentioned answers but nothing worked for me  My gradle build was failing every time  Just found this solution   Add annotationProcessor  org projectlombok lombok  in your build gradle   This worked for me

User · Answer

If you are using maven  try adding Lombok path to maven-compiler-plugin list of annotation processor as shown below            lt plugin gt               lt groupId gt org apache maven plugins lt  groupId gt               lt artifactId gt maven-compiler-plugin lt  artifactId gt               lt version gt 3 8 1 lt  version gt               lt configuration gt                   lt source gt 1 8 lt  source gt                   lt target gt 1 8 lt  target gt                   lt annotationProcessorPaths gt                       lt path gt                           lt groupId gt org mapstruct lt  groupId gt                           lt artifactId gt mapstruct-processor lt  artifactId gt                           lt version gt 1 3 0 Final lt  version gt                       lt  path gt                       lt path gt                           lt groupId gt org projectlombok lt  groupId gt                           lt artifactId gt lombok lt  artifactId gt                           lt version gt 1 18 10 lt  version gt                       lt  path gt                   lt  annotationProcessorPaths gt               lt  configuration gt           lt  plugin gt    Change the version as per your version of Lombok  Other than that ensure you have done the following   installed the Lombok plugin for Intellij  Enabled annotation processing for your project under File - gt  Settings - gt  Build  Execution  Deployment - gt  Compiler - gt  Annotation Processor  For me both  Obtain processors from project classpath and Processor path is working  So not sure what will work for you  but try whichever works    And rather than shooting in the dark for hours  Reading a little bit how annotation processors work and are used by compiler may help  so have quick read below   http   hannesdorfmann com annotation-processing annotationprocessing101

User · Answer

Try to create lombok config file under project base directory and provide lombok log fieldName value  Example  lombok log fieldName   LOG

User · Answer

What sorted out things for me was to tick the checkbox  Use plugin registry  in Maven settings   The path is  File -  Preferences -  Build  Execution  Deployment -  Build Tools -  Maven

User · Answer

Presumably  that s the Lombok  Slf4j annotation you re using  You ll need to install the Lombok plugin in IntelliJ if you want IntelliJ to recognize Lombok annotations  Otherwise  what do you expect if you try to use a field that doesn t exist

User · Answer

I ve just installed the latest idea verion 2108 1 and found this issue  after installed lombok plugin and restart the Idea resolve it

User · Answer

Delete  idea folder and  iml files in each module and rebuild the solution

User · Answer

This is another related post Lombok not working with IntelliJ 2020 3 Community Edition which may resolve the question when user use lombook and IntelliJ 2020 3 CommunityEdition

User · Answer

I have the same issue  I use gradle and IDEA  It turns out that  it s caused by the wrong version of gradle  In gradle wrapper gradle-wrapper properties  it is  distributionUrl https    services gradle org distributions gradle-4 8-bin zip However  I specified the version in IDEA to be D  Library gradle-5 2 1 After lower the gradle version to be 4 10 x  the issue is gone

User · Answer

1 My gradle lombok dependecies   implementation  org projectlombok lombok 1 18 10  annotationProcessor  org projectlombok lombok 1 18 10    2 After enabling  Annotations     in IDEA  Settings   taking into account that you have installed Lombok plugin  that resolved my the same issue

User · Answer

After enabling annotation processors and installing the lombok plugin  it still didn t work  We worked around it by checking the Idea option  Delegate IDE build to gradle

User · Answer

Removing the  Slf4J annotation from the class and then re-adding it worked for me

User · Answer

This won t have been OP s problem  but for anyone else who tries everything with no success   I had similar symptoms  Whenever I built after a mvn clean  it wouldn t find log  or getXYZ    or builder    or anything    ERROR    symbol    variable log  ERROR    location  class com example MyClass  ERROR   Path To Some Java src main com example MyClass java  30 38  cannot find symbol  ERROR    symbol    method builder    ERROR    location  class com example MyClass   After reading every answer I could find about QueryDSL JPA Hibernate Lombok IntelliJ Maven issues to no avail  I worked out that the culprit was a single static import of a  Getter method that was annotated on a static field   Spring 1 15 14 RELEASE  Intellij 2019 1 1   SpringBootApplication public class BarApplication implements ApplicationContextAware      Getter   private static ApplicationContext applicationContext            start Spring application  and grab hold of ApplicationContext as it comes past     import     import static BarApplication getApplicationContext    Slf4j public class IMakeItAllFail      public IMakeItAllFail           log info       getApplicationContext               Slf4j public class Foo     Foo         log info  I fail to compile but I have nothing to do with the other classes

User · Answer

In addition to having Lombok plugin installed  also make sure that the  Enable annotation processing  checkbox is ticked under   Preferences  gt  Compiler  gt  Annotation Processors   Note  starting with IntelliJ 2017  the  Enable Annotation Processing  checkbox has moved to   Settings  gt  Build  Execution  Deployment  gt  Compiler  gt  Annotation Processors

User · Answer

In IDEA 13 this seems to no longer be an issue  you just have to have the Lombok plugin installed

User · Answer

There is the following step to be followed here  Step 1  Enabled annotation processing for your project under File - gt  Settings - gt  Build  Execution  Deployment - gt  Compiler - gt  Annotation Processor Screenshot  Step 2  Install lombok plugin in IntelliJ IDE after that restart IDE  Screenshot  Step 3  Add the dependency in build gradle file   compileOnly  org projectlombok lombok 1 18 12   annotationProcessor  org projectlombok lombok 1 18 12   or https   developervisits wordpress com 2020 09 16 building-with-lomboks-slf4j-and-intellij-cannot-find-symbol-log  hope this answer is helpful for you

User · Answer

I was seeing this issue with an older version of Lombok when compiling under JDK8   Setting the project back to JDK7 made the issue go away

User · Answer

Itsn t a IntelliJ problem  If you try under console  run mvn install  also breaks  All annotations from lombok extern needed add dependencies  This package groups the next annotations    CommonsLog Flogger Log JBossLog Log4 Log4j2 Slf4j XSlf4j   For example  for Slf4j it s necessary add this dependency to your pom xml   lt dependency gt       lt groupId gt org slf4j lt  groupId gt       lt artifactId gt slf4j-api lt  artifactId gt       lt version gt   slf4j version  lt  version gt   lt  dependency gt

User · Answer

I had Lombok plugin  annotations enabled  it was compiling from command line - everything and it still did not see my project as maven  all maven dependencies were red in source files   Then I clicked SHIFT twice and searched for  maven  and among results there was  Reload all Maven Projects   After running it Maven tab appeared and I was able to compile  and all red underlining in source code disappeared

User · Answer

A simple thing but I figured it out is  I missed adding  Log to the class   Log public class YourClassName        It may help someone

User · Answer

This worked for me   File - gt  Settings - gt  Build  Execution  Deployment - gt  Compiler - gt  Annotation Processor  Tick on  enable annotation processing   Apply  Close

User · Answer

I had the same kind of error  right after a warning like the following  java  You aren t using a compiler supported by lombok  so lombok will not work and has been disabled    Your processor is  com sun proxy  Proxy27   Lombok supports  OpenJDK javac  ECJ  In my case  it was an unfortunate combination of lombok  lt  1 18 16 and IDEA 2020 3

User · Answer

So if the issue persists even after enabling the annotation processing and installing the Lombok plugin  There s an issue with IDEA 2020 3 and Lombok  you could fix this by following this fix  basically  add -Djps track ap dependencies false to the VM options  you can find it in  Preferences - gt  Compiler  Named  Shared build process VM Options

User · Answer

2019   Get a plugin and you are sorted     File   Settings   Plugins

User · Answer

Worked for me    It was failing on CircleCI  amp  on Jenkins as well  If you re a Gradle User try add the following into your dependencies  dependencies         Other Dependencies  gt  gt         LOMBOK Dependencies     annotationProcessor  org projectlombok lombok      compileOnly  org projectlombok lombok      testAnnotationProcessor  org projectlombok lombok      testCompileOnly  org projectlombok lombok

[intellij-idea] Building with Lombok's @Slf4j and Intellij: Cannot find symbol log

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