Intellij maven project Fatal error compiling: invalid flag: --release

Question

I am trying to start with Spring-boot, Maven in Intellij Please help me I am getting the error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project spring-rest: Fatal error compiling: invalid flag: --release -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
Process finished with exit code 1

My pom.xml is:

<?xml version="1.0" encoding="UTF-8"?> <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>com.example</groupId>
       <artifactId>spring-rest</artifactId>
       <version>3.1.3.RELEASE</version>
       <packaging>war</packaging>

       <name>spring-rest</name>
       <description>Demo project for Spring Boot</description>

       <parent>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-parent</artifactId>
           <version>2.0.0.RELEASE</version>
           <relativePath/> <!-- lookup parent from repository -->
       </parent>

       <properties>
           <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
           <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
           <java.version>1.8</java.version>
       </properties>

       <dependencies>

           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-security</artifactId>
               <version>2.0.0.RELEASE</version>
           </dependency>

         <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter</artifactId>
         </dependency>

           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-data-jpa</artifactId>
           </dependency>
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-web</artifactId>
           </dependency>

           <dependency>
               <groupId>org.hibernate.javax.persistence</groupId>
               <artifactId>hibernate-jpa-2.1-api</artifactId>
               <version>RELEASE</version>
           </dependency>


           <dependency>
               <groupId>mysql</groupId>
               <artifactId>mysql-connector-java</artifactId>
               <scope>runtime</scope>
           </dependency>
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-test</artifactId>
               <scope>test</scope>
           </dependency>
       </dependencies>

       <build>
           <plugins>
               <plugin>
                   <groupId>org.springframework.boot</groupId>
                   <artifactId>spring-boot-maven-plugin</artifactId>
               </plugin>

               <plugin>
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-compiler-plugin</artifactId>
                   <version>3.7.0</version>
                   <configuration>
                       <source>1.8</source>
                       <target>1.8</target>
                       <release>8</release>
                       <verbose>true</verbose>
                   </configuration>
               </plugin>
           </plugins>
       </build>

   </project>

Answer 1

In your pom.xml file, simply remove the tag <release>8</release> from your maven-compiler-plugin configuration:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.7.0</version>
    <configuration>
        <source>1.8</source>
        <target>1.8</target>
        <verbose>true</verbose>
    </configuration>
</plugin>

Answer 2

This has to do with the version of JDK running on your system. As per the documentation for maven-compiler-plugin, the release flag is supported since 1.9, and thus has to be commented/removed from the POM if you are using prior (1.8 and below) versions of JDK.

Check Maven documentation for release tag for maven-compiler-plugin here

Answer 3

open terminal to check that Maven using correct version of Java

run: mvn -v

If you will see an old Java version, that might be the problem.

Being on Linux, I suggest removing Maven, eg using Fedora package manager dnf remove maven or check your PATH for maven.

Download one from here: https://maven.apache.org/download.cgi

Extract downloaded to your home path, eg ~/maven .

Add/Edit ~/maven/bin to your PATH

Reapply .bash_profile (or re-login)

Run mvn -v

Now you should see a correct Java version in the output

Answer 4

I faced this problem too, check your JAVA_HOME environment variable. I was setting the value of release to 11 as I am using JAVA 11. My System JAVA_HOME was set for java 8, After adding the JAVA_HOME user environment variable to the java 11 path this got resolved.

Answer 5

An alternative approach is to directly set the compiler flags inside your properties tag instead of using the <configuration> tag of the compiler plugin:

<properties>
       <maven.compiler.source>8</maven.compiler.source>
       <maven.compiler.target>8</maven.compiler.target>
 <!--  Use the release flag only if you are using Java 9+  -->
 <!--  <maven.compiler.release>8</maven.compiler.release>  -->
       <!-- verbose is useful for debugging purposes -->
       <maven.compiler.verbose>true</maven.compiler.verbose> 
</properties>

As stated in the official page:

https://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html

Answer 6

这主要是因为 java 版本不匹配。为项目管理多个 Java 版本可能会很痛苦。

我正在同时处理要求不同版本的 java 的项目，并且一直在使用jenv<\/a>来切换 java 版本。

更多细节在这里<\/a>

"

Answer 7

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.10.1:testCompile (default-testCompile) on project selenium-for-beginners: Execution default-testCompile of goal org.apache.maven.plugins:maven-compiler-plugin:3.10.1:testCompile failed: multiple points -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException

When trying to do a Selenium maven beginner project if you are running into this trouble/issue. Please try to change the maven plugin in the pom.xml file. Use Plugin for "Compile Using the --release javac option (JDK 9+)". This should work.

Answer 8

Set the $MAVEN_HOME and JAVA_HOME in environment Properties

1. Check the maven version ( C:>mvn -version )

2. Check the Java Version ( C:>java -version )

Add the below code snip in pom.xml file and change the version number of maven

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.7.0</version> // replace the maven version number 
    <configuration>
        <source>1.8</source>
        <target>1.8</target>
        <verbose>true</verbose>
    </configuration>
</plugin>

Answer 9

I was getting this error with Java v8, then resolved the issue by updating to Java v11, updating JAVA_HOME, and updating my IntelliJ SDK settings to use the new jdk.

Answer 10

This configuration worked for me, for java 11. (IntelliJ version 2019.1) java.version is 11, declared in the properties part of the pom.xml. Maven version should be 3.6 or higher.

<plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.0</version>
            <configuration>
                <fork>false</fork>
                <source>${java.version}</source>
                <target>${java.version}</target>
                <encoding>UTF-8</encoding>
                <compilerArgs>
                    <arg>-parameters</arg>
                </compilerArgs>
                <release>${java.version}</release>
                <forceJavacCompilerUse>true</forceJavacCompilerUse>
            </configuration>
            <executions>
                <!-- Replacing default-compile as it is treated specially by maven -->
                <execution>
                    <id>default-compile</id>
                    <phase>none</phase>
                </execution>
                <!-- Replacing default-testCompile as it is treated specially by maven -->
                <execution>
                    <id>default-testCompile</id>
                    <phase>none</phase>
                </execution>
                <execution>
                    <id>java-compile</id>
                    <phase>compile</phase>
                    <goals>
                        <goal>compile</goal>
                    </goals>
                </execution>
                <execution>
                    <id>java-test-compile</id>
                    <phase>test-compile</phase>
                    <goals>
                        <goal>testCompile</goal>
                    </goals>
                </execution>
            </executions>
    </plugin>