Error:java: java.lang.ExceptionInInitializerError com.sun.tools.javac.code.TypeTags when trying to run maven

I'm new to maven but I would like to use it to run simple deeplearing4j program. After adding all the necessary dependencies I get the following: <br><br>
Error:java: release version 5 not supported<br><br>
After following the instructions at this page (changing my SDK, language and target byte code to 11)<br><br>
<br><br>

I'm getting this:<br><br>

Error:java: java.lang.ExceptionInInitializerError
com.sun.tools.javac.code.TypeTags
Error:java: java.lang.ExceptionInInitializerError

I've also tried setting JDK 14 but I get the same error. Here is my pom.xml file:<br><br>

<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>org.example</groupId>
    <artifactId>Deep</artifactId>
    <version>1.0-SNAPSHOT</version>
    
    <properties>
        <maven.compiler.source>1.11</maven.compiler.source>
        <maven.compiler.target>1.11</maven.compiler.target>
        <dl4j.version>0.9.1</dl4j.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.nd4j</groupId>
            <artifactId>nd4j-native-platform</artifactId>
            <version>${dl4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.deeplearning4j</groupId>
            <artifactId>deeplearning4j-core</artifactId>
            <version>${dl4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.datavec</groupId>
            <artifactId>datavec-api</artifactId>
            <version>${dl4j.version}</version>
        </dependency>
        
        <dependency>
            <groupId>org.nd4j</groupId>
            <artifactId>nd4j-api</artifactId>
            <version>1.0.0-beta3</version>
        </dependency>
        
        <dependency>
            <groupId>org.deeplearning4j</groupId>
            <artifactId>deeplearning4j-play_2.11</artifactId>
            <version>0.9.1</version>
        </dependency>
        
    </dependencies>

</project>

If anybody can shed some light on what I might be doing wrong here I would appreciate it.

This is wrong.

<maven.compiler.source>1.11</maven.compiler.source>
<maven.compiler.target>1.11</maven.compiler.target>

Post Java 1.9, the version naming has changed. Make the following changes in the pom.xml.

<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>

The same convention follows from 10+ Java version.

The real issue is: one of library org.deeplearning4j:deeplearning4j-core:jar:0.9.1:compile this jar having a dependency on org.projectlombok:lombok:jar:1.16.16:compile.

So this was an issue with Lombok which they fixed in a later version. To see all transitive dependencies you can do a mvn dependency:tree and see all transitive dependencies of the libraries you have brought in.

I have included the below dependency in the pom and that resolved the issue.

<dependency>
  <groupId>org.projectlombok</groupId>
  <artifactId>lombok</artifactId>
  <version>1.18.2</version>
  <scope>provided</scope>
</dependency>

Add this to pom.xml:

<dependency>
  <groupId>org.projectlombok</groupId>
  <artifactId>lombok</artifactId>
  <version>1.18.20</version>
  <scope>provided</scope>
</dependency>

It could be a reason of getting this issues while running application Intellij that you haven't configuration Project SDK setting in IDE.

I also got this error, when using jdk 10 to compile java8 source code.

After changing environment variable JAVA_HOME to jdk8 home dir, this error disappear.

If you're using jdk8 to run your project and still face the same error.
Please follow the following 2 steps.

1. check whether you're able to execute your maven project from IntelliJ's maven bar, instead of from the terminal.
2. If your project builds then check whether your JAVA_HOME is setup correctly. (In my case I switched from bash to zsh, and JAVA_HOME. was not setup)

I have also faced that problem.
Check the JAVA_HOME variable. For ubuntu, go to the terminal and write echo $JAVA_HOME. If you see the difference between this and java -version you will need to set the appropriate version of JDK to your JAVA_HOME like below
export JAVA_HOME=YOUR_JDK_BIN_PATH.

I had a similar issue and I was able to solve by changing JDK version from 11 to 8. By the way, this is not running in 8 mode using JDK 11. You actually need a JDK 8 bundle.