maven - Hudson build fail: Non-resolvable parent POM

Question

I used to work with Hudson on my project, and lately I had to move it to a new server.

I configured it the exact same way it use to be (for all I can tell) but when I try to launch a build, it fails and I get the following error:

Démarré par l'utilisateur anonymous
Checking out http://[...]/trunk/MyProject/ear
A         .classpath
A         .project
A         target
AU        target/ear-1.0-SNAPSHOT.ear
A         target/application.xml
A         target/ear-1.0-SNAPSHOT
A         target/ear-1.0-SNAPSHOT/META-INF
A         target/ear-1.0-SNAPSHOT/META-INF/application.xml
AU        target/ear-1.0-SNAPSHOT/web-1.0-SNAPSHOT.war
AU        target/ear-1.0-SNAPSHOT/business-1.0-SNAPSHOT.jar
A         pom.xml
A         .settings
A         .settings/org.eclipse.jdt.core.prefs
A         .settings/org.maven.ide.eclipse.prefs
At revision 136
no change for http://[...]/trunk/MyProject/ear since the previous build
Found mavenVersion 3.0.2 from file jar:file:/usr/share/maven/apache-maven-3.0.2/lib/maven-core-3.0.2.jar!/META-INF/maven/org.apache.maven/maven-core/pom.properties
Parsing POMs
ERROR: Echec à la lecture des POMs
org.apache.maven.project.ProjectBuildingException: Some problems were encountered while processing the POMs:
[FATAL] Non-resolvable parent POM: Could not find artifact com.rha:MyProject:pom:1.0-SNAPSHOT and 'parent.relativePath' points at wrong local POM @ line 9, column 10

    at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:325)
    at hudson.maven.MavenEmbedder.buildProjects(MavenEmbedder.java:360)
    at hudson.maven.MavenEmbedder.readProjects(MavenEmbedder.java:330)
    at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:1148)
    at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:991)
    at hudson.FilePath.act(FilePath.java:756)
    at hudson.FilePath.act(FilePath.java:738)
    at hudson.maven.MavenModuleSetBuild$RunnerImpl.parsePoms(MavenModuleSetBuild.java:698)
    at hudson.maven.MavenModuleSetBuild$RunnerImpl.doRun(MavenModuleSetBuild.java:531)
    at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:420)
    at hudson.model.Run.run(Run.java:1362)
    at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:405)
    at hudson.model.ResourceController.execute(ResourceController.java:88)
    at hudson.model.Executor.run(Executor.java:145)
Finished: FAILURE

The pom.xml file when I got to Hudson "workspace" looks like this:

[...]

    <parent>
        <groupId>com.rha</groupId>
        <artifactId>MyProject</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

[...]

    <dependencies>
        <dependency>
            <groupId>com.rha</groupId>
            <artifactId>business</artifactId>
            <version>1.0-SNAPSHOT</version>
            <type>ejb</type>
        </dependency>
        <dependency>
            <groupId>com.rha</groupId>
            <artifactId>web</artifactId>
            <version>1.0-SNAPSHOT</version>
            <type>war</type>
        </dependency>
    </dependencies>

</project>

[Edit]

Actually I forgot some important informations:

My project is divided into 3 parts:

business (packaged into .jar) web (packaged into a .war) ear (packaged the .war and .jar into a .ear)

I'm using Subversion, and under my "trunk" folder I got a "MyProject" folder including:

.project
.settings/
business/
ear/
pom.xml
src/
web/

what happens is:

in my Hudson job configuration, I filled the SVN field "repository URL" with:

http://[...]/trunk/MyProject/ear

and here is the "pom.xml" from "MyProject" folder:

<?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 

[...]
    <modules>
        <module>business</module>
        <module>web</module>
        <module>ear</module>
    </modules>
[...]

so the parent "pom.xml" is actually located at "../pom.xml" on my SVN repository, under "trunk/MyFolder".

But Hudson can't see it for some reason (but like I said, it used to work on the previous server).

Any clue ?

[/Edit]

I guess this is a rookie mistake, I'm a total beginner on Maven, but I just can't figure out why it's not working anymore ...

Any help will be greatly appreciated !

Nicolas

Answer 1

relativePath (of the parent) defaults to ../pom.xml. It looks like it is not present in there. You could set it to an empty value so that maven downloads it as a dependency.

 <relativePath/> 

This link discusses this.

[Edit: based on the edits to the question]

Hudson only sees the source code inside ear folder. Though the parent pom is present in SVN, it is not available to Hudson. Missing parent pom was aa warning in Maven 2 but strict in Maven 3.

There are two ways to solve this.

One is to specify to hudson, the url http://[...]/trunk/MyProject/. You can then chose to build all the modules or still choose to build the pom.xml of ear project alone.

The other is to manually run mvn install on the hudson system so that the parent pom gets deployed once and thereafter used by hudson. However, this will not get updated if parent pom is subsequently changed.