First application using Maven

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In my application I am trying to use Maven, but I have some problems that can be related to configuration, when I will generate a project JAR or use some Run As option from the pom.xml file in the terminal the return is always:

-Dmaven.multiModuleProjectDirectory system propery is not set. Check $M2_HOME environment variable and mvn script match.

I am using jdk1.8.0_45, apache-Maven-3.3.3 and the following environment variables have already been added: JAVA_HOME and M2_HOME.

pom.xml

<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>appgeodev</groupId>
<artifactId>simple-map</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<dependencies>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.3.1</version>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.hamcrest</groupId>
        <artifactId>hamcrest-all</artifactId>
        <version>1.3</version>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <finalName>simple-map</finalName>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.3</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
</build>

java maven

  • How are you M2_HOME and PATH?

  • M2_HOME looks like this: C: starcode apache-Maven-3.3.3 and PATH : ;%JAVA_HOME% bin;%M2_HOME% bin;

  • You’re running something with this is: -Dmaven.multiModuleProjectDirectory=$M2_HOME? As is windows, tried without the $?

  • @Brunocésar, I tried to execute this command in cmd with and without $ , as follows: mvn -Dmaven.multiModuleProjectDirectory=$M2_HOME, but unsuccessfully, the terminal returns me the following message: Please set the M2_HOME variable in your Environment to match the Location of the Maven installation

  • This way you put it will surely give error, because you are without any goal. Try, for example mvn clean -Dmaven.multiModuleProjectDirectory=$M2_HOME and update with the bug, tested in a windows here and is OK. If possible, include your pom.xml

  • @Brunocésar seems to be a problem in my configuration, because when I give the command mvn -version it shows me the following message on the terminal: ERROR: M2_HOME is set to an invalid directory. M2_HOME = "C program Files apache-Maven-3.0.4" Please set the M2_HOME variable in your Environment to match the Location of the Maven installation

  • I also could not run your suggested command, my pom.xml this very basic, nothing that should generate any problem

  • That value for M2_HOME It’s different from what I said before. See if the directory is correct, if it is configured right, without being in the user variables, etc.

  • That statement of "C program Files apache-Maven-3.0.4" is what the terminal, my M2_HOME path looks like: C: starcode apache-Maven-3.3.3, I’ll add my pom.xml

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2 answers

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An alternative

In your eclipse access:

Window / Preference / Java / Installed Jres

Select the JRE and click Edit

On the field Default VM Arguments adds:

-Dmaven.multiModuleProjectDirectory=$M2_HOME

Obs.: You need to have Mave Home set.

0


Not to leave the topic without final answer, I ended up solving the problem by reinstalling the eclipse for the last version, apparently it was some problem with its installation because the Maven was installed correctly.

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