Could not find artifact when building java application using s2i with maven multimodule from GIT Submodules

[glennodickson]

Hi
Currently having difficultly building a Maven multimodule project using GIT submodules.

Using a GIT local repo as the source for OKD/Openshift S2i build for a Java (JDK21) application on OKD 4.15. The build pulls the root Git project but then attempts to locate the POM for the GIT submodules and cannot find them in Maven Central.

My understanding is that since the mvn command in the BuildConfig (below) uses the '-am" switch it should be building dependant projects like the Base submodule. (i.e. artifact au.com.cs.base:api )

Any help would be appreciated.

Below are the artefacts.

BuildConfig:

kind: BuildConfig
apiVersion: build.openshift.io/v1
metadata:
  name: test3
  namespace: test
  uid: 2bae8477-2ec2-4446-9286-314ea33ed54d
  resourceVersion: '5147078'
  generation: 79
  creationTimestamp: '2024-04-15T14:38:54Z'
  labels:
    app: test3
    app.kubernetes.io/component: test3
    app.kubernetes.io/instance: test3
spec:
  nodeSelector: null
  output:
    to:
      kind: ImageStreamTag
      name: 'test2:latest'
  resources: {}
  successfulBuildsHistoryLimit: 5
  failedBuildsHistoryLimit: 5
  strategy:
    type: Source
    sourceStrategy:
      from:
        kind: ImageStreamTag
        namespace: openshift
        name: 'openjdk-21:latest'
      env:
        - name: MAVEN_ARGS_APPEND
          value: '-pl inventory/api -am'
  postCommit: {}
  source:
    type: Git
    git:
      uri: 'ssh://somesuser@somedomain/volume1/repo/project/cybackend/backend'
      ref: master
    contextDir: inventory/api
    sourceSecret:
      name: some-ssh-key
  triggers:
    - type: GitHub
      github:
        secret: <somesecret>
    - type: Generic
      generic:
        secret: <somesecret>
    - type: ConfigChange
    - type: ImageChange
      imageChange: {}
  runPolicy: Serial
status:
  lastVersion: 48
  imageChangeTriggers:
    - lastTriggeredImageID: 'registry.access.redhat.com/ubi9/openjdk-21@sha256:779ca5034381bd4859ea9b51c7121f28210a97aa17a6914c32255237bc578445'
      from:
        namespace: openshift
        name: 'openjdk-21:latest'
      lastTriggerTime: '2024-05-02T03:26:06Z'

Both Base and Inventory projects are structured within:

• Maven as multimodule i.e. Backend is the root project
• GIT as submodule i.e. Backend is the repo

Project Structure:

Backend
|
+--+---base
   |   +---api
   |   +---core
   |   +---data
   |   +---grpc
   |   +---model
   |   +---rsocket
   |   +---service
   +---inventory
       +---api
       +---data
       +---grpc
       +---inv-rsocket
       +---model
       \---service

Note:

• Backend is the parent of base and inventory project
• base-api is the parent of inventory-api etc (for other projects)

The OKD/Openshift Buildconfig is ocnfiured in the following YAML:

The build pods runs and executes with the following maven build command:

mvn -e -Popenshift -DskipTests -Dcom.redhat.xpaas.repo.redhatga -Dfabric8.skip=true -Djkube.skip=true --batch-mode -Djava.net.preferIPv4Stack=true -s /tmp/artifacts/configuration/settings.xml -Dmaven.repo.local=/tmp/artifacts/m2 -pl inventory/api -am package

Error experienced is:

Non-resolvable parent POM for au.com.cs.inventory:api:0.0.1-SNAPSHOT: Could not find artifact au.com.cs.base:api:pom:0.0.1-SNAPSHOT in central (https://repo1.maven.org/maven2) and 'parent.relativePath' points at wrong local POM @ line 6, column 10

Backend POM:

<project 	...>
...
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>3.2.0</version>
		<relativePath>../pom.xml</relativePath>
	</parent>

	<groupId>au.com.cs</groupId>
	<artifactId>backend</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>pom</packaging>

	<name>backend</name>
	<description>Base project for Base</description>

	<modules>
		<module>base</module>
		<module>inventory</module>
....
   </modules>

	<properties>
   ...
	</properties>
   
   ...
   
     <profiles>
        <profile>
            <id>openshift</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.eclipse.jkube</groupId>
                        <artifactId>openshift-maven-plugin</artifactId>
                        <version>${jkube.version}</version>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>resource</goal>
                                    <goal>build</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>

Base POM:

<project ...>
	<parent>
		<groupId>au.com.cs</groupId>
		<artifactId>backend</artifactId>
		<version>0.0.1-SNAPSHOT</version>
		<relativePath>../pom.xml</relativePath>
	</parent>

	<groupId>au.com.cs</groupId>
	<artifactId>base</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>pom</packaging>

	<name>base</name>
	<description>Base project for Base</description>

	<modules>
		<module>rsocket</module>
		<module>grpc</module>
		<module>core</module>
		<module>model</module>
		<module>data</module>
		<module>service</module>
		<module>api</module>
	</modules>

Inventory POM:

<project  ...>
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>au.com.cs</groupId>
		<artifactId>base</artifactId>
		<version>0.0.1-SNAPSHOT</version>
		<relativePath>../base/pom.xml</relativePath>
	</parent>
	<groupId>au.com.cs</groupId>
	<artifactId>inventory</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>pom</packaging>

	<name>inventory</name>
	<description>Inventory project for Container Sales</description>

	<modules>
		<module>api</module>
		<module>inv-rsocket</module>
		<module>model</module>
		<module>data</module>
		<module>service</module>
		<module>grpc</module>
	</modules>
</project>

API POM:

<project ...>
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>au.com.cs.base</groupId>
		<artifactId>api</artifactId>
		<version>0.0.1-SNAPSHOT</version>
		<relativePath>../../../base/api/pom.xml</relativePath>		<!-- lookup parent from repository -->
	</parent>

	<groupId>au.com.cs.inventory</groupId>
	<artifactId>api</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<name>api</name>
	<description>API project for Inventory</description>

TIA

[glennodickson]

Hi
I have it working now but not entirely sure how. I was initially was building with ubi8/openjdk-11 image and later I realised my mistake and changed to ubi9/openjdk-21 since my code was using Java21

I believe deleting the image may had something to do with it as after sometime it all started working. The only difference also is that the "also-make" is different but should have the same effect.

      env:
        - name: MAVEN_ARGS_APPEND
          value: '-pl inventory/api --also-make'

Anyway hope this helps someone.

Thanks