i can't solve maven building error failure

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I get a error when I use maven to build my project.so please help! thank you for your help

Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.2.1:assembly (make-assembly) on project newstart-app-ithelp: Execution make-assembly of goal org.apache.maven.plugins:maven-assembly-plugin:2.2.1:assembly failed: For artifact {null:null:null:jar}: The groupId cannot be empty. cause : Execution make-assembly of goal org.apache.maven.plugins:maven-assembly-plugin:2.2.1:assembly failed: For artifact {null:null:null:jar}: The groupId cannot be empty. Stack trace : org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.2.1:assembly (make-assembly) on project newstart-app-ithelp: Execution make-assembly of goal org.apache.maven.plugins:maven-assembly-plugin:2.2.1:assembly failed: For artifact {null:null:null:jar}: The groupId cannot be empty.

<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">
<parent>
    <groupId>com.feinno.app</groupId>
    <artifactId>root-pom</artifactId>
    <version>1.0.0</version>
</parent>
<modelVersion>4.0.0</modelVersion>

<groupId>newstart.app</groupId>
<artifactId>newstart-app-ithelp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>newstart-app-ithelp</name>
<url>http://maven.apache.org</url>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>2.2.1</version>
            <configuration>
                <appendAssemblyId>false</appendAssemblyId>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
                <archive>
                    <manifest>
                        <mainClass>com.newstart.app.ithelp.ITHelpBean</mainClass>
                    </manifest>
                </archive>
            </configuration>
            <executions>
                <execution>
                    <id>make-assembly</id>
                    <phase>package</phase>
                    <goals>
                        <goal>assembly</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <verbose>true</verbose>
                <fork>true</fork>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>
        </plugin>

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <configuration>
                <skip>true</skip>
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <dependency>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-resources-plugin</artifactId>
        <version>2.4.3</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.16</version>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.1.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpmime</artifactId>
        <version>4.1.2</version>
    </dependency>
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.0</version>
    </dependency>
    <dependency>
        <groupId>com.feinno.app</groupId>
        <artifactId>feinno-app-common</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>org.quartz-scheduler</groupId>
        <artifactId>quartz</artifactId>
        <version>2.2.0</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.24</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>0.2.9</version>
    </dependency>
    <dependency>
        <groupId>spring-aop</groupId>
        <artifactId>spring-aop</artifactId>
        <version>3.2.3</version>
    </dependency>
    <dependency>
        <groupId>spring-beans</groupId>
        <artifactId>spring-beans</artifactId>
        <version>3.2.3</version>
    </dependency>
    <dependency>
        <groupId>spring-context</groupId>
        <artifactId>spring-context</artifactId>
        <version>3.2.3</version>
    </dependency>
    <dependency>
        <groupId>spring-core</groupId>
        <artifactId>spring-core</artifactId>
        <version>3.2.3</version>
    </dependency>
    <dependency>
        <groupId>spring-jdbc</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>3.2.3</version>
    </dependency>
    <dependency>
        <groupId>spring-tx</groupId>
        <artifactId>spring-tx</artifactId>
        <version>3.2.3</version>
    </dependency>
    <dependency>
        <groupId>spring-expression</groupId>
        <artifactId>spring-expression</artifactId>
        <version>3.2.3</version>
    </dependency>
    <dependency>
        <groupId>IKAnalyzer</groupId>
        <artifactId>IKAnalyzer</artifactId>
        <version>6</version>
    </dependency>
    <dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>1.1.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.lucene</groupId>
        <artifactId>lucene-core</artifactId>
        <version>3.6.0</version>
    </dependency>
    <dependency>
        <groupId>net.sf.ehcache</groupId>
        <artifactId>ehcache-core</artifactId>
        <version>2.6.0</version>
    </dependency>
    <dependency>
        <groupId>linq4j</groupId>
        <artifactId>linq4j</artifactId>
        <version>1.0</version>
    </dependency>
</dependencies>
<distributionManagement>
    <snapshotRepository>
        <id>snapshots</id>
        <url>http://10.10.208.92:8081/content/repositories/snapshots</url>
    </snapshotRepository>
</distributionManagement>

I have fixed this issue by deleting local .m2/repository folder. The build is successful now.

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And mine has a different solution. I had a POM that had a <dependencyManagement> entry for the jar without any <version>, and it had a <dependencies> entry for the jar with a <version>. Plus, the parent POM had a <dependencyManagement> entry with the same <version>. Apparently this confused Maven (3.3). The build worked fine, but the packaging did not.

Fix: remove <dependencyManagement> entry in the child POM, and remove the <version> from the <dependencies> entry in the child POM.

In code, here is the broken situation:

Parent pom.xml:
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>${httpclient.version}</version>
        </dependency>
    </dependencies>
</dependencyManagement>

Child pom.xml:
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>
    </dependencies>
</dependencyManagement>
...
<dependencies>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>${httpclient.version}</version>
    </dependency>
</dependencies>

Post fix: parent POM is the same, child pom has just this

<dependencies>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
    </dependency>
</dependencies>

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recently I stuck with the same problem. I turns that assembly-plugin doesn't propagate/report errors with dependencies:

[DEBUG] Resolving project dependencies transitively.
[DEBUG] com.g.....0.4-SNAPSHOT (selected for null)
[DEBUG]           org.springframework:spring-expression:jar:3.1.4.RELEASE:compile (selected for compile)
[DEBUG]           org.springframework:spring-asm:jar:3.1.4.RELEASE:compile (selected for compile)
[DEBUG]         trove:trove:jar:1.0.2:compile (selected for compile)
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
....
[INFO] p.....mo ....................................... FAILURE [57.144s]
[INFO] BUILD FAILURE

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.5.4:single (full) on project p...o: Execution full of goal org.apache.maven.plugins:maven-assembly-plugin:2.5.4:single failed: For artifact {null:null:null:jar}: The groupId cannot be empty. -> [Help 1]

that's all what I've got from assembly-plugin. eg. compiler warns about the broken stuff:

[WARNING] error reading /var/lib/jenkins/...org/hyperic/sigar/1.6.3.82/sigar-1.6.3.82.jar; error in opening zip file
[WARNING] error reading /var/lib/jenkins/.../org/hyperic/sigar/1.6.3.82/sigar-1.6.3.82.jar; error in opening zip file

Thus, if you've been stuck in this trouble, invoke mvn dependency:tree to troubleshoot the dependency.

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If you look at your maven build output, there should be some warnings that say .pom is invalid, transitive dependencies (if any) will not be available. Delete all the artifacts corresponding to those poms and rebuild, you need not delete the entire repository.

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I recently came across this building a spring boot 2.2 project. Turns out the problem was an out of date maven-assembly-plugin. Our build specified 2.3 but spring boot's bom requested at least 3.1.1. Bumping to 3.2.0 (the latest at time of writing) fixed the problem.

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Comments
  • It says, The groupId cannot be empty. post the pom.xml
  • What were you trying to do exactly? Which command? Also, did you read the error message?
  • Are you running mvn clean install, or?
  • Maybe you could try and clean the .m2-folder manually, and then run mvn install on your project? Then after that, run your above command to see if the problem persists.
  • I hate inscrutable errors like this... This worked for me too. If you're running windows and don't know where to find this, just go to %username%\.m2 .
  • This worked for me. My mvn build had failed earlier with checksum error, because of issues with our internal nexus. After that failed build, I got "Execution make-assembly of goal org.apache.maven.plugins:maven-assembly-plugin:2.2.1:assembly failed: For artifact {null:null:null:jar}: The groupId cannot be empty." error.
  • Thank you for posting this; your solution was exactly my problem. Now I know enough that I think I can reproduce MASSEMBLY-664, should I choose to expend the energy on doing so.