mvn clean install not able to resolve class

Question

I have the following maven structure

parent POM.XML
 - common/pom.xml
 - search/pom.xml

Search module is not able to get common module classes when i do mvn clean install on search module I get package de.test.common does not exists. I even ran mvn clean install on parent platform but no success. common module is building fine.

<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>de.test.search</groupId>
    <artifactId>search</artifactId>
    <packaging>jar</packaging>
    <parent>
        <groupId>de.test.platform</groupId>
        <artifactId>platform</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <properties>
        <app-name>search</app-name>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>
        <dependency>
            <groupId>de.test.common</groupId>
            <artifactId>common</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
    </dependencies>
    <profiles>
        <profile>
            <id>searchdev</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-devtools</artifactId>
                    <optional>true</optional>
                </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-surefire-plugin</artifactId>
                        <configuration>
                            <skipTests>true</skipTests>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
            <properties>
                <!-- log configuration -->
                <logback.loglevel>DEBUG</logback.loglevel>
            </properties>
        </profile>
        <profile>
            <id>searchprod</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>com.heroku.sdk</groupId>
                        <artifactId>heroku-maven-plugin</artifactId>
                        <version>1.0.3</version>
                        <configuration>
                            <appName>${app-name}</appName>
                        </configuration>
                    </plugin>
                    <plugin>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-maven-plugin</artifactId>
                    </plugin>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-surefire-plugin</artifactId>
                        <configuration>
                            <skipTests>true</skipTests>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
            <properties>
                <!-- log configuration -->
                <logback.loglevel>INFO</logback.loglevel>
            </properties>
        </profile>
    </profiles>
</project>

common pom

<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>de.test.common</groupId>
    <artifactId>common</artifactId>
    <packaging>jar</packaging>
    <parent>
        <groupId>de.test.platform</groupId>
        <artifactId>platform</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <properties>
        <app-name>common</app-name>
    </properties>
    <profiles>
        <profile>
            <id>commondev</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-devtools</artifactId>
                    <optional>true</optional>
                </dependency>
            </dependencies>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-surefire-plugin</artifactId>
                        <configuration>
                            <skipTests>true</skipTests>
                        </configuration>
                    </plugin>
                    <plugin>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-maven-plugin</artifactId>
                    </plugin>
                </plugins>
            </build>
            <properties>
                <!-- log configuration -->
                <logback.loglevel>DEBUG</logback.loglevel>
            </properties>
        </profile>
        <profile>
            <id>commonprod</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>com.heroku.sdk</groupId>
                        <artifactId>heroku-maven-plugin</artifactId>
                        <version>1.0.3</version>
                        <configuration>
                            <appName>${app-name}</appName>
                        </configuration>
                    </plugin>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-surefire-plugin</artifactId>
                        <configuration>
                            <skipTests>true</skipTests>
                        </configuration>
                    </plugin>
                    <plugin>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-maven-plugin</artifactId>
                    </plugin>
                </plugins>
            </build>
            <properties>
                <!-- log configuration -->
                <logback.loglevel>INFO</logback.loglevel>
            </properties>
        </profile>
    </profiles>
</project>

I think i have the same problem mentioned here

maven compilation failure

Found the problem but not the cause

I removed the following dependency and everything is okay

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

after removing the plugin the jar is build in a different structure. When spring boot plugin was there the whole content was inside BOOT-INF folder which i think was the cause, not sure though... need expert opinion here.

have you installed 'common' module (to your local repository - mvn clean install ) — kuhajeyan, Aug 29 '16 at 09:40
yes i have the jar under \.m2\repository\de\test\common\common\0.0.1-SNAPSHOT — Saurabh Kumar, Aug 29 '16 at 09:42
bit strange i just ran with above same setup mvn clean install run fine — kuhajeyan, Aug 29 '16 at 12:43

score 2 · Answer 1 · answered Aug 29 '16 at 12:04

2

The easiest way to solve this is through a so called reactor project, where you build all dependent modules with the parent pom. To that end, add the following code to your parent POM:

<modules>
  <module>common</module>
  <module>search</module>
</modules>

Now, build the parent pPOM and your entire build should work. Also, don't use explicit versions in the child projects, only inherit the version from the parent POM (I think you're good there). If you reference dependencies from the same project reactor, use the version ${project.version}.

answered Aug 29 '16 at 12:04

Sean Patrick Floyd

292,901
67
465
588

I have already the snippet defined in the parent POM and the worse part is the parent pom build is breaking in search module complaning that common module is not there .... – Saurabh Kumar Aug 29 '16 at 13:04
updated the reactor console ... it always breaks at the project which imports common module. – Saurabh Kumar Aug 29 '16 at 13:08
see updated. The spring boot plugin was causing issues. Dont know why. – Saurabh Kumar Aug 30 '16 at 09:13

score 1 · Accepted Answer · answered Sep 14 '16 at 09:56

1

Found the solution. May be somebody will find it useful.

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

answered Sep 14 '16 at 09:56

Saurabh Kumar

16,353
49
133
212

What it does is appending the specified classifier at the end of Spring Boot Jar while keeping the non-Boot Jar as is. This way the dependent module can get its dependency. Spring Boot Jar is repackaged in a way that the dependent module cannot load a repackaged jar's classes. – xli Jan 31 '19 at 21:03

mvn clean install not able to resolve class

2 Answers2