How to pre build jar which is used as dependency in Maven - java

I created POM.xml file which worked perfectly until I deleted a 3rd party jar,that is dependent in my project. The problem is that the jar is missing, but it is created using the maven-antrun-plugin.
Here is the source of the plugin that creates the jar:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.8</version>
<executions>
<execution>
<phase>generate-sources</phase>
<configuration>
<tasks>
<property environment="env" />
<property name="appname" value="hellojavaworld" />
<echoproperties />
<exec dir="" executable="respawn.exe" searchpath="true">
<arg value="${basedir}\src\aion\${appname}.app" />
</exec>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
Further in the POM.xml file is this:
<dependency>
<groupId>hellojavaworld</groupId>
<artifactId>hellojavaworld</artifactId>
<scope>system</scope>
<systemPath>${basedir}\src\aion\hellojavaworld.bin\hellojavaworld.jar</systemPath>
<version>1.0</version>
<optional>true</optional>
</dependency>
Everything works fine if the hellojavaworld.jar is compiled manually,but in case the jar does not exist, there is the error missing artifact.
Question is how to write POM.xml that creates jar that is used as dependency in one POM.xml file without manual intervetions?
Thanks

One solution is to use a multi-module build. The SonaType book has a chapter devoted to the subject.
Basically you would need three POM files.
The parent:
<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>org.sonatype.mavenbook.multi</groupId>
<artifactId>parentHoldsItTogether</artifactId>
<packaging>pom</packaging>
<version>1.0</version>
<name>Multi Chapter Simple Parent Project</name>
<modules>
<module>hellojavaworld</module>
<module>thingThatNeedsHellojavaworld</module>
</modules>
</project>
A POM for hellojavaworld:
<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>
<parent>
<groupId>org.sonatype.mavenbook.multi</groupId>
<artifactId>parentHoldsItTogether</artifactId>
<version>1.0</version>
</parent>
<artifactId>hellojavaworld</artifactId>
<packaging>jar</packaging>
</project>
A POM for the consumer of the library:
<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>
<parent>
<groupId>org.sonatype.mavenbook.multi</groupId>
<artifactId>parentHoldsItTogether</artifactId>
<version>1.0</version>
</parent>
<artifactId>thingThatNeedsHellojavaworld</artifactId>
<packaging>???</packaging>
<dependencies>
<dependency>
<groupId>org.sonatype.mavenbook.multi</groupId>
<artifactId>hellojavaworld</artifactId>
<version>1.0</version>
</dependency>
</dependencies>
</project>
You would organize the directory structure like this:
your_project_folder/
pom.xml <-- the parent POM
hellojavaworld/
pom.xml
src/main/java
thingThatNeedsHellojavaworld/
pom.xml
src/main/java

Create a multi module maven project: See chapter 6 of Maven by example.
The first module would be you hellojavaworld and the second the application which has a dependency on hellojavaworld.
pom.xml:
<project>
...
<modules>
<module>hellojavaworld</module>
<module>application</module>
</modules>
...
application/pom.xml
...
<dependencies>
<dependency>
<groupId>hellojavaworld</groupId>
<artifactId>hellojavaworld</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
...

Related

Obtaining systemPath from properties file

I'm very new to maven, so kindly bear with me.
i have a maven project with almost 100 dependencies all of which are present in my local system. So I'm adding them to my classpath via pom.xml with <scope> being system and <systemPath> giving path to the said dependencies. A rough structure of my pom.xml looks like this:
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com</groupId>
<artifactId>MAVEN_APP</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>MAVEN_APP</name>
<properties>
<jdk.version>1.8</jdk.version>
</properties>
<dependencies>
<dependency>
<groupId>jar1</groupId>
<artifactId>dependency1</artifactId>
<version>0.9.5</version>
<scope>system</scope>
<systemPath>path/to/directory/outside/project/directory/jar1Name.jar</systemPath>
</dependency>
......
<dependency>
<groupId>jar100</groupId>
<artifactId>dependency10</artifactId>
<version>1.9.7</version>
<scope>system</scope>
<systemPath>path/to/directory/outside/project/directory/jar10Name.jar</systemPath>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
This includes all the jars into my classpath and everything is running fine.
But i would like to keep the path/to/directory/outside/project/directory/ inside my app.propeties file and pom.xml should fetch this path from the properties file.
Is there a way in maven to do this.
Could somebody help me here. Thanks in advance.

EAR with WARs containing different versions of dependencies

Here is my requirement
EAR
WAR (Code)
----Dependency A v1
WAR (Code same as WAR above)
----Dependency A v2
AS the code for WAR project is same I don't want to create multiple code base for WAR project. So I'm looking for EAR pom.xml in such a way that maven builds the WAR with dependency A v1 which can be passed as some property while building WAR.
EAR pom.xml
...
(modules)
(webmodule)
(artifact)WAR(/artifact)
dependency version v1
(content-path)/warwithv1(/content-path)
(/webmodule)
(webmodule)
(artifact)WAR(/artifact)
dependency version v2
(content-path)/warwithv2(/content-path)
(/webmodule)
...
Thanks
Sorry for the XML Tags
EDIT: Answer changed after clarification in comments.
The question as I now understand it is: How does one use a single POM to create 2 WAR files that both have the same source code but different dependencies.
The solution I propose is to create a parent POM that will specify one module per WAR. One of the modules will contain the source code for the war and specify one version of dependencies. The second module will refer to the first module for its source code and will specify a second version of dependencies.
Here is my high level project structure:
Here is the top level (parent) POM:
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>maven-war-diff-depend</groupId>
<artifactId>maven-war-diff-depend</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<modules>
<module>module1</module>
<module>module2</module>
</modules>
</project>
Module1 will specify v2.3 of log4j2, here is its POM:
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>maven-war-diff-depend</groupId>
<artifactId>maven-war-diff-depend</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>module1</artifactId>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.3</version>
</dependency>
</dependencies>
</project>
Module2 will specify v2.8.1 of log4j2 and point to module1 for its source code and web.xml file. Note that you may need to do additional work to refer to any other resources in module1 such as adding more maven plugins and configuration.
Here is the module2 POM:
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>maven-war-diff-depend</groupId>
<artifactId>maven-war-diff-depend</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>module2</artifactId>
<packaging>war</packaging>
<build>
<sourceDirectory>../module1/src/main/java</sourceDirectory>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.2</version>
<configuration>
<webXml>../module1/src/main/webapp/WEB-INF/web.xml</webXml>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.8.1</version>
</dependency>
</dependencies>
</project>
Note that I only have a single Java class in module1 just to show that in fact this class is compiled and included in both module1 and module2:
Here are the results of a simple clean install build:
Once you have the two WAR files built it's fairly simple to add another module (this would be your EAR) which will include both of the WAR files - I believe that is your final goal.
So, create a third module:
Add the new module to your root level (parent) POM:
<module>module3</module>
Create the necessary configuration in your new module's POM. This involves adding dependencies on the other two artifacts you create with module1 and module2 and configuring the ear plugin as needed.
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>maven-war-diff-depend</groupId>
<artifactId>maven-war-diff-depend</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>module3</artifactId>
<packaging>ear</packaging>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ear-plugin</artifactId>
<version>2.10</version>
<configuration>
<applicationXml>${basedir}/target/application.xml</applicationXml>
<modules>
<webModule>
<groupId>maven-war-diff-depend</groupId>
<artifactId>module1</artifactId>
</webModule>
<webModule>
<groupId>maven-war-diff-depend</groupId>
<artifactId>module2</artifactId>
</webModule>
</modules>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>maven-war-diff-depend</groupId>
<artifactId>module1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<type>war</type>
</dependency>
<dependency>
<groupId>maven-war-diff-depend</groupId>
<artifactId>module2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<type>war</type>
</dependency>
</dependencies>
</project>
Now when you build it will create an EAR that includes the 2 WARs generated by module1 and module2. The ear in this example is simply called module3:
EDIT: Original answer re-added per request in comments.
Here is the POM from the original proposal - using two profiles to specify different dependency versions. As before please note that it's not a good idea to include servlet api inside of a WAR file, it's just being used here as a visual example to show how common dependencies are specified.
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>maven-war-diff-depend</groupId>
<artifactId>maven-war-diff-depend</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
</dependencies>
<profiles>
<profile>
<id>v2.3</id>
<dependencies>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.3</version>
</dependency>
</dependencies>
</profile>
<profile>
<id>v2.8.1</id>
<dependencies>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.8.1</version>
</dependency>
</dependencies>
</profile>
</profiles>
</project>

Create Jar file using maven Plugin

I'm having some issues while making the JAR file which project type is pom and adding this jar in other project as dependency.
I'm using maven shaded plugins to make a JAR . It compiles well but it creates a jar file in project target directory but not in .m2 folder. Moreover, when i extract the file it doesn't have classes and resources etc
here are two projects i have
1) ProjectTestB
Project B is a independent project which have various modules like scheduler, service, web module which adds as dependency in other project
POM.XML
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>TestProjectB</groupId>
<artifactId>ProjectTestB</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.3</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<excludes>
<exclude>classworlds:classworlds</exclude>
<exclude>junit:junit</exclude>
<exclude>jmock:*</exclude>
<exclude>*:xml-apis</exclude>
<exclude>org.apache.maven:lib:tests</exclude>
<exclude>log4j:log4j:jar:</exclude>
</excludes>
</artifactSet>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<modules>
<module>scheduler</module>
</modules>
</project>
2) ProjectA
Project A contains a dependency of ProjectB and some other services and business classes. Only Project A Contains Main class which will create executable JAR file
Pom.xml
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>projectA</groupId>
<artifactId>projectA</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.2.1.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>TestProjectB</groupId>
<artifactId>ProjectTestB</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
So the questions are
1) How to make jar which have all the classes, resources etc if project package is POM (Project B)?
2) How can i add Project B jar file in Project A class path to access it modules?
As I see you try do something strange.
Your projectB has many modules, so your projectA should has dependency to those modules. Propably module of projecB has type jar, so you can ease depend on it without doing magic with projectB

Spring application context unable to find property files under maven resources folder

I am using maven in my project & I've put database.properties file under
maven resources folder.
I am accessing it in spring application context
<context:property-placeholder location="classpath:database.properties" />
But I don't understand why I am getting this file not found error on server start.
Could not load properties; nested exception is
java.io.FileNotFoundException: class path resource
[database.properties] cannot be opened because it does not exist
To my knowledge whatever resource is put under resources folder it is added to the classpath automatically by maven.
pom.xml
<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.myapp</groupId>
<artifactId>myapp</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>myapp Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>myapp</finalName>
</build>
</project>
NOTE: Seems like there is some problem with the M2E plugin of eclipse luna. Executed the same code in Juno & it worked fine.
That's not enough to build a deployable war file with maven. You need at least the war plugin. There's a thorough tutorial here:
http://crunchify.com/how-to-create-a-war-file-from-eclipse-using-maven-plugin-apache-maven-war-plugin-usage/
Your pom will look something like below, and you'll need to run mvn clean install against that.
Also I see you have a spring app, where are the spring dependencies in the pom 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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>CrunchifyTutorial</groupId>
<artifactId>CrunchifyTutorial</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
</dependencies>
</project>

Invalid packaging for parent pom.xml, must be "pom" but is "ear"

Could anybody suggest me an solution with the following exception. I am going to create a multi-module project.
Parent Project name is LOGICBACKEND
child project name is DBAccess
I need to have ear file of LOGICBACKEND which should contain DBAccess prjoects jar file.
I am getting following exception when i run mav clean install -P Developer.
[ERROR]The project com.project1.Database:DBAccess:1.0-SNAPSHOT (C:\Project1\DBAccess\pom.xml) has 1 error
[ERROR]Invalid packaging for parent POM com.project1.logic:LOGIC:1.0-SNAPSHOT (C:\Project1\pom.xml), must be "pom" but is "ear" # com.project1.logic:LOGIC:1.0-SNAPSHOT, C:\Project1\pom.xml, line 6, column 13
This is how part of my parent pom.xml looks
<modelVersion>4.0.0</modelVersion>
<groupId>com.project1.logic</groupId>
<artifactId>LOGICBACKEND</artifactId>
<packaging>ear</packaging>
<version>1.0-SNAPSHOT</version>
This is how child pom.xml looks
<groupId>com.project1.logic</groupId>
<artifactId>DBAccess</artifactId>
<packaging>ejb</packaging>
<name>DBAccess</name>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>com.project1.logic</groupId>
<artifactId>DBAccess</artifactId>
<version>1.0-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>
Could anybody help me here to understand what is going wrong here.
Thanks in advance for any help
This simple setup is a good start.
.
├── pom.xml
├── services
| ├── pom.xml
| └── src
| └── main
| └── java
| └── com
| └── stackoverflow
| └── MyEjbService.java
└── application
└── pom.xml
pom.xml
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.stackoverflow.Q13330930</groupId>
<artifactId>parent</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<name>${project.artifactId}-${project.version}</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<modules>
<module>services</module>
<module>application</module>
</modules>
<dependencies>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.stackoverflow.Q13330930</groupId>
<artifactId>services</artifactId>
<version>${project.version}</version>
<type>ejb</type>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<artifactId>maven-ejb-plugin</artifactId>
<version>2.3</version>
<configuration>
<ejbVersion>3.1</ejbVersion>
</configuration>
</plugin>
</plugins>
</build>
</project>
services/pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.stackoverflow.Q13330930</groupId>
<artifactId>parent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.stackoverflow.Q13330930</groupId>
<artifactId>services</artifactId>
<packaging>ejb</packaging>
<name>${project.artifactId}-${project.version}</name>
</project>
application/pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.stackoverflow.Q13330930</groupId>
<artifactId>parent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.stackoverflow.Q13330930</groupId>
<artifactId>application</artifactId>
<packaging>ear</packaging>
<name>${project.artifactId}-${project.version}</name>
<dependencies>
<dependency>
<groupId>com.stackoverflow.Q13330930</groupId>
<artifactId>services</artifactId>
<type>ejb</type>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-ear-plugin</artifactId>
<version>2.7</version>
<configuration>
<defaultLibBundleDir>lib</defaultLibBundleDir>
</configuration>
</plugin>
</plugins>
</build>
</project>
You are trying to give the parent pom two functions - that is serving as a parent pom (packaging pom) and being the wrapper ear (packaging ear) - at the same time. To solve your issue you should create another maven module under your parent pom that has packaging ear and uses the maven-ear-plugin to define the output.
I got the similar error:
[ERROR]
[ERROR] Invalid packaging for parent POM sandbox:parent:6.5-SNAPSHOT, must be "pom" but is "jar" # sandbox:parent:6.5-SNAPSHOT
I figured out that the root cause was in parent version defined through properties:
<version>${revision}${changelist}</version>
As soon as I set version without referencing the properties the issue gone:
<version>6.5-SNAPSHOT</version>
Might be a maven bug.

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