[MNG-5543] NoClassDefFoundError when using executions in maven

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 3.1.1
• Component/s: Integration Tests

Environment

Apache Maven 3.1.1 (0728685237757ffbf44136acec0402957f723d9a; 2013-09-17 16:22:22+0100)
Maven home: /opt/apache-maven
Java version: 1.7.0_45, vendor: Oracle Corporation
Java home: /opt/jdk1.7.0_45/jre
Default locale: en_IE, platform encoding: UTF-8
OS name: "linux", version: "3.11.0-13-generic", arch: "amd64", family: "unix"

• Assignee: Unassigned
• Reporter: John Farrelly
• Created: 02/Dec/13 10:25
• Updated: 05/Dec/13 12:08
• Resolved: 05/Dec/13 05:59

Description

I've created the smallest maven POM file I can to highlight the problem (see below).

I'm using an email server plugin (for integration testing). I can launch the plugin no problem:

    mvn emailserver:run
    [INFO] --- emailserver-maven-plugin:1.1.1:run (default-cli) @ project ---
    [INFO] Starting Greenmail mail server...
    [INFO] Started Greenmail mail server
    [INFO] Waiting for command from client

However, I have configured the plugin to run before the `integration-test` lifecycle. When run this way, I get a `NoClassDefFoundError`:

    mvn integration-test
    Exception in thread "Thread-1" java.lang.NoClassDefFoundError: com/icegreen/greenmail/util/ServerSetup

When I execute maven with `-X` to see what's happening, in both cases it shows the same dependency tree as far as I can see, so I'm at a bit of a loss as to why I'm getting an exception which it's launched through lifecycle phases. Hopefully someone can help!

    <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.mytest</groupId>
        <artifactId>project</artifactId>
        <packaging>jar</packaging>
        <version>1.0</version>
        <name>Test Project</name>

        <build>
            <plugins>
                <plugin>
                    <groupId>com.btmatthews.maven.plugins</groupId>
                    <artifactId>emailserver-maven-plugin</artifactId>
                    <configuration>
                        <monitorKey>emailserver</monitorKey>
                        <monitorPort>10025</monitorPort>
                        <serverName>greenmail</serverName>
                        <portOffset>13000</portOffset>
                        <useSSL>false</useSSL>
                    </configuration>
                    <executions>
                        <execution>
                            <id>run-mail</id>
                            <goals>
                                <goal>run</goal>
                            </goals>
                            <phase>pre-integration-test</phase>
                            <configuration>
                                <daemon>true</daemon>
                            </configuration>
                        </execution>
                        <execution>
                            <id>stop-mail</id>
                            <goals>
                                <goal>stop</goal>
                            </goals>
                            <phase>post-integration-test</phase>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </project>

Maven information:

    > mvn -v
    Apache Maven 3.1.1 (0728685237757ffbf44136acec0402957f723d9a; 2013-09-17 16:22:22+0100)
    Maven home: /opt/apache-maven
    Java version: 1.7.0_45, vendor: Oracle Corporation
    Java home: /opt/jdk1.7.0_45/jre
    Default locale: en_IE, platform encoding: UTF-8
    OS name: "linux", version: "3.11.0-13-generic", arch: "amd64", family: "unix"

NOTE
This appears to be a problem on 3.1.1 only. I downloaded 3.0.5 and it worked as expected.