Receiving could not resolve dependencies error when trying to add local dependencies to heroku java app

Question

I am trying to follow the 'Adding Unmanaged Dependencies to a Maven Project' article on Heroku to add a local JAR dependency to a java project. I keep on getting stuck at the Update Pom file section, where it tells me to add/update the repositories element. I added the example repository elements to my pom.xml file and when i try to push my code to heroku i receive the following error:

Failed to execute goal on project fuji: Could not resolve dependencies for project com.example.fuji:fuji:jar:1.0-SNAPSHOT: Could not find artifact com.example.tambora:Tambora:jar:0.0.1-SNAPSHOT in project.local

It seems that I named either the repository id or name element wrong but I can't figure out what they should be changed too. I am able to run this application locally without receiving any errors.

Heres my pom.xml file

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example.fuji</groupId>
  <artifactId>fuji</artifactId>
  <version>1.0-SNAPSHOT</version>
  <name>Fuji</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>com.example.tambora</groupId>
      <artifactId>Tambora</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-core</artifactId>
        <version>7.0.22</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-logging-juli</artifactId>
        <version>7.0.22</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <version>7.0.22</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-jasper</artifactId>
        <version>7.0.22</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-jasper-el</artifactId>
        <version>7.0.22</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-jsp-api</artifactId>
        <version>7.0.22</version>
    </dependency>
  </dependencies>
  <build>
    <finalName>fuji</finalName>
    <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>appassembler-maven-plugin</artifactId>
            <version>1.1.1</version>
            <configuration>
                <assembleDirectory>target</assembleDirectory>
                <programs>
                    <program>
                        <mainClass>launch.Main</mainClass>
                        <name>webapp</name>
                    </program>
                </programs>
            </configuration>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>assemble</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
  </build>
  <repositories>
    <!--other repositories if any-->
    <repository>
        <id>project.local</id>
        <name>project</name>
        <url>file:${project.basedir}/repo</url>
    </repository>
</repositories>
</project>

ryanbrainard ryanbrainard · Accepted Answer · 2013-02-01T01:23:45

This is probably happening because com.example.tambora:Tambora:jar:0.0.1-SNAPSHOT is a SNAPSHOT, but SNAPSHOTs have not been enabled for your custom repository. According to Maven: The Complete Reference, this is required:

As a default setting, Maven will not check for SNAPSHOT releases on remote repositories. To depend on SNAPSHOT releases, users must explicitly enable the ability to download snapshots using a repository or pluginRepository element in the POM.

You should be able that like this:

<repository>
    <id>project.local</id>
    <name>project</name>
    <url>file:${project.basedir}/repo</url>
    <snapshots>
        <enabled>true</enabled>
    <checksumPolicy>fail</checksumPolicy>
  </snapshots>
</repository>

Also, when troubleshooting this locally, I would recommend deleting your ~/.m2/repo/com/example/tambora directory, because what's probably happening is that Maven is finding the JAR in your local repo instead of the one embedded in your project.

Receiving could not resolve dependencies error when trying to add local dependencies to heroku java app

1 Answers