Maven dependency not found but present in mvnrepository

Question

I created a simple web scraper with Java and Selenium. It just reads a single piece of information and writes that to a CSV file.

I'm trying to run it daily using some scheduler on Heroku. The official Heroku documentation says I need to add this to the pom.xml:

         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>3.0.1</version>
            <executions>
                <execution>
                    <id>copy-dependencies</id>
                    <phase>package</phase>
                    <goals><goal>copy-dependencies</goal></goals>
                </execution>
            </executions>
        </plugin>

But when I add it to the pom.xml, I'll get

Plugin 'org.apache.maven.plugins:maven-dependency-plugin:3.0.1' not found

even though it found in mvnrepository.com. What is happening here?

Answer 1

First of all, run the build again (with something like mvn clean verify) and see if you get the error again.

If so, you probably have a network/firewall issue, or you misconfigured your settings.xml (if you have one).