Maven Multi-Module Project, Not Resolving Dependencies

Question

I have a multi-module maven project that I can't get to compile. I have a Nexus repository sitting on my local network, and it is working (IntelliJ Idea is able to resolve my dependencies which reside only in that repository), and I am building through Jetbrains TeamCity. I am fairly certain that TeamCity is working since several other build configurations I have set up still work (using the same settings.xml). I am a bit of a loss for what could be causing the issue. Here are my pom files:

Parent pom:

<?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.company.product.plugins</groupId>
    <artifactId>plugin-parent</artifactId>
    <version>1.2-SNAPSHOT</version>
    <packaging>pom</packaging>

    <modules>
        <module>product-wireless-plugin</module>
        <module>product-paging-plugin</module>
    </modules>

    <distributionManagement>
        <repository>
            <id>releases</id>
            <url>http://192.168.2.192:8081/nexus/content/repositories/releases/</url>
        </repository>
        <snapshotRepository>
            <id>snapshots</id>
            <url>http://192.168.2.192:8081/nexus/content/repositories/snapshots</url>
        </snapshotRepository>
    </distributionManagement>

    <pluginRepositories>
        <pluginRepository>
            <id>autoincrement-versions-maven-plugin</id>
            <name>autoincrement-versions-maven-plugin</name>
            <url>http://autoincrement-versions-maven-plugin.googlecode.com/svn/repo</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

    <build>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>autoincrement-versions-maven-plugin</artifactId>
                <version>2.0-SNAPSHOT</version>
                <executions>
                    <execution>
                        <id>update-pom-versions</id>
                        <goals>
                            <goal>increment</goal>
                            <goal>commit</goal>
                        </goals>
                        <phase>compile</phase>
                        <configuration>
                            <autoIncrementVersion>true</autoIncrementVersion>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <testFailureIgnore>true</testFailureIgnore>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

product-wireless pom:

<?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">
    <parent>
        <artifactId>plugin-parent</artifactId>
        <groupId>com.company.product.plugins</groupId>
        <version>1.2-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.company.product.plugins</groupId>
    <artifactId>product-wireless-plugin</artifactId>
    <version>0.1.2</version>

    <distributionManagement>
        <repository>
            <id>releases</id>
            <url>http://192.168.2.192:8081/nexus/content/repositories/releases/</url>
        </repository>
        <snapshotRepository>
            <id>snapshots</id>
            <url>http://192.168.2.192:8081/nexus/content/repositories/snapshots</url>
        </snapshotRepository>
    </distributionManagement>

    <dependencies>
        <dependency>
            <groupId>com.company.product</groupId>
            <artifactId>product-common</artifactId>
            <version>0.9.1</version>
        </dependency>
    </dependencies>

</project>

product-paging pom:

<?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">
    <parent>
        <artifactId>plugin-parent</artifactId>
        <groupId>com.company.product.plugins</groupId>
        <version>1.2-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.company.product.plugins</groupId>
    <artifactId>product-paging-plugin</artifactId>
    <version>0.1.2</version>

    <distributionManagement>
        <repository>
            <id>releases</id>
            <url>http://192.168.2.192:8081/nexus/content/repositories/releases/</url>
        </repository>
        <snapshotRepository>
            <id>snapshots</id>
            <url>http://192.168.2.192:8081/nexus/content/repositories/snapshots</url>
        </snapshotRepository>
    </distributionManagement>

    <dependencies>
        <dependency>
            <groupId>com.company.product</groupId>
            <artifactId>product-common</artifactId>
            <version>0.9.1</version>
        </dependency>
    </dependencies>

</project>

And the error I am getting is:

com.company.product.plugins:product-wireless-plugin [13:54:16][com.company.product.plugins:product-wireless-plugin] Importing data from 'C:/TeamCity/buildAgent/work/40ac813105cf8bd7/product-wireless-plugin/target/surefire-reports/TEST-*.xml' with 'surefire' processor [13:54:16][com.company.product.plugins:product-wireless-plugin] Surefire report watcher [13:54:16][com.company.product.plugins:product-wireless-plugin] Downloading: repolocation/nexus/content/groups/public/com/company/product/product-parent/0.9.0/product-parent-0.9.0.pom [13:54:16][com.company.product.plugins:product-wireless-plugin] Failed to execute goal on project product-wireless-plugin: Could not resolve dependencies for project com.company.product.plugins:product-wireless-plugin:jar:0.1.2: Failed to collect dependencies for [com.company.product:product-common:jar:0.9.1 (compile)]

I am at quite a loss while trying to debug this... does anyone have any suggestions?

Answer 1

There are several approaches / tools for troubleshooting this sort of problem.

1. For this "could not resolve dependencies" error, there is almost always a more detailed error message and/or stacktrace earlier in the build log. Maven logs are actually extremely verbose, to the point of having to search for the "root" error message several screens up from the build failure.

2. Re-run the build with the -X flag. Here is documentation of Maven command line switches

3. Another option is to use mvn dependency:tree to inspect the full graph of transitive dependencies. mvn help:effective-pom is another useful tool that prints out the pom.xml after considering your settings.xml, any active profiles, etc. Likewise mvn help:active-profiles