Maven Build compilation Error | Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war

When you are using Java 17 and trying to compile your Java project using Maven, you may experience this error. this is due to version incompatible issue of maven war plug-in.

you can upgrade your Java version in Jenkins by executing below command:

sudo apt install openjdk-17-jdk -y

or you can follow steps to setup Jenkins with Java 17.

Fix in your Java Web App:

Add following plug-in to pom.xml of your Java Project to fix the build issue:

  <build>
    <finalName>MyWebApp</finalName>
     <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.3.1</version>
        </plugin>
      </plugins>
  </build>
</project>

Save the pom.xml and re-run the build.

Install Maven using Ansible Role on Ubuntu - Install Maven on Ubuntu using Ansible Role

Ansible Role for installing Maven on Ubuntu

cd ~/roles

sudo vi aws-infra-role/tasks/installMaven.yml

    - name: Install Maven using Ansible
      become: yes
      apt:
        name: "{{ packages }}"
        state: present
      vars:
        packages:
           - maven

Modify Ansible main playbook

sudo vi aws-infra-role/setup-jenkins.yml

---

# This Playbook creates infra in aws cloud

- hosts: My_Group

  gather_facts: False

  tags: jenkins creation

  tasks:

  - include: tasks/installJava11.yml

  - include: tasks/installMaven.yml

Execute Ansible Role

ansible-playbook aws-infra-role/setup-jenkins.yml

This should install Maven on the  target node.

Install Jenkins on Ubuntu 24.0.4 | Setup Jenkins on Linux instance | How to setup Jenkins in Ubuntu EC2 instance using Java 21?

Jenkins is an open source continuous integration/continuous delivery and deployment (CI/CD) automation software DevOps tool written in the Java programming language. It is used to implement CI/CD workflows, called pipelines.

Please follow the steps to install Java, Jenkins, Maven on Ubuntu 24.0.4 instance. Jenkins, Maven are Java based applications, so we need to install Java first. 

Pre-requisites:

•  at least memory should be t2.medium (4 GB RAM)
• port 8080 opened in firewall rule to access Jenkins
• Connect to EC2 instance using git bash or iTerm

Change Host Name to Jenkins
sudo hostnamectl set-hostname Jenkins

Perform update first
sudo apt update

Install Java 21

sudo apt install openjdk-21-jre -y

Verify Java Version

java -version

Maven Installation
Maven is a popular build tool used for building Java applications. Please click here to learn more about Maven. You can install Maven by executing below command:

sudo apt install maven -y

you can type mvn --version
you should see the below output.

Now lets start Jenkins installation

Jenkins Setup

Add Repository key to the system

sudo wget -O /etc/apt/keyrings/jenkins-keyring.asc https://pkg.jenkins.io/debian-stable/jenkins.io-2026.key

Append debian package repo address to the system

echo "deb [signed-by=/etc/apt/keyrings/jenkins-keyring.asc]" \
  https://pkg.jenkins.io/debian-stable binary/ | sudo tee \
  /etc/apt/sources.list.d/jenkins.list > /dev/null

Update Ubuntu package

sudo apt update

Install Jenkins

sudo apt install jenkins -y

The above screenshot should confirm that Jenkins is successfully installed.

Access Jenkins in web browser

Now Go to AWS console. Click on EC2, click on running instances link. Select the checkbox of EC2 you are installing Java and Jenkins. Click on Action. Copy the value from step 4 that says --> Connect to your instance using its Public DNS:

Now go to browser. enter public dns name or public IP address with port no 8080.

http://EC2_public_dns_name:8080

Unlock Jenkins
You may get screen, enter the below command in Git bash( Ubuntu console)

Get the initial password from the below file
sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Copy the password and paste in the browser.

Then click on install suggested plug-ins. 

Also create user name and password.

enter everything as admin. at least user name as admin password as admin

Click on Save and Finish. Click on start using Jenkins. Now you should see a screen like below:

That's it. You have setup Jenkins successfully 😊

Please watch the steps in our YouTube channel:

Install Jenkins on Ubuntu 24.0.4 in Azure VM | Setup Jenkins on Azure Linux instance | How to setup Jenkins in Ubuntu Virtual Machine running in Azure Cloud?

Jenkins is an open source continuous integration/continuous delivery and deployment (CI/CD) automation software DevOps tool written in the Java programming language. It is used to implement CI/CD workflows, called pipelines.

Please follow the steps to install Java, Jenkins, Maven on Ubuntu 24.0.4 instance. Jenkins, Maven are Java based applications, so we need to install Java first. 

Pre-requisites:

• Azure Virtual machine is setup and running in Azure Cloud
• ssh terminal to connect to Azure VM
• Make sure 8080 port is opened in Networking-->Add inbound port role

Change Host Name to Jenkins
sudo hostnamectl set-hostname Jenkins

Perform update first
sudo apt update

Install Java 11

sudo apt install default-jdk -y

 

Once install java, enter the below command

Verify Java Version

java -version

Maven Installation
Maven is a popular build tool used for building Java applications. Please click here to learn more about Maven. You can install Maven by executing below command:

sudo apt install maven -y

you can type mvn --version
you should see the below output.

Now lets start Jenkins installation

Jenkins Setup

Add Repository key to the system

sudo wget -O /etc/apt/keyrings/jenkins-keyring.asc https://pkg.jenkins.io/debian-stable/jenkins.io-2026.key

Append debian package repo address to the system

echo "deb [signed-by=/etc/apt/keyrings/jenkins-keyring.asc]" \
  https://pkg.jenkins.io/debian-stable binary/ | sudo tee \
  /etc/apt/sources.list.d/jenkins.list > /dev/null

Update Ubuntu package

sudo apt update

Install Jenkins

sudo apt install jenkins -y

The above screenshot should confirm that Jenkins is successfully installed.

Access Jenkins in web browser

Now Go to Azure Portal console. Click on Jenkins VM, Copy the public IP address.

 

Now go to browser. enter public IP address with port no 8080.

http://AzureVM_public_IP:8080

Unlock Jenkins
You may get screen, enter the below command in Git bash( Ubuntu console)

Get the initial password from the below file
sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Copy the password and paste in the browser.

Then click on install suggested plug-ins. 

Also create user name and password.

enter everything as admin. at least user name as admin password as admin

Click on Save and Finish. Click on start using Jenkins. Now you should see a screen like below:

That's it. You have setup Jenkins successfully. 

Please watch the steps in our YouTube channel:    

Install Jenkins on Ubuntu 22.0.4 | Setup Jenkins on AWS EC2 Ubuntu instance | How to setup Jenkins in Ubuntu EC2 instance?

Jenkins is an open source, continuous integration/continuous delivery and deployment (CI/CD) automation software DevOps tool written in the Java programming language. It is used to implement CI/CD workflows, called pipelines. 

Please follow the steps to install Java, Jenkins, Maven on Ubuntu 22.0.4 instance. Jenkins, Maven are Java based applications, so we need to install Java first. 

Pre-requisites:

• EC2 instance is up and running
• port 8080 is open in firewall rule
• connect to EC2 instance using Git bash or item or any SSH terminal

Steps to install Jenkins:

Change Host Name to Jenkins
sudo hostnamectl set-hostname Jenkins

Perform update first
sudo apt update

Install Java 11

sudo apt install default-jdk -y

 

Once install java, enter the below command

Verify Java Version

java -version

Maven Installation
Maven is a popular build tool used for building Java applications. Please click here to learn more about Maven. You can install Maven by executing below command:

sudo apt install maven -y

you can type mvn --version
you should see the below output.

Now lets start Jenkins installation

Jenkins Setup

Add Repository key to the system

curl -fsSL https://pkg.jenkins.io/debian/jenkins.io-2023.key | sudo tee \

  /usr/share/keyrings/jenkins-keyring.asc > /dev/null

Append debian package repo address to the system

echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \

  https://pkg.jenkins.io/debian binary/ | sudo tee \

  /etc/apt/sources.list.d/jenkins.list > /dev/null

Update Ubuntu package

sudo apt update

Install Jenkins

sudo apt install jenkins -y

The above screenshot should confirm that Jenkins is successfully installed.

Access Jenkins in web browser

Now Go to AWS console. Click on EC2, click on running instances link. Select the checkbox of EC2 you are installing Java and Jenkins. Click on Action. Copy the value from step 4 that says --> Connect to your instance using its Public DNS:

Now go to browser. enter public dns name or public IP address with port no 8080.

http://EC2_public_dns_name:8080

Unlock Jenkins
You may get screen, enter the below command in Git bash( Ubuntu console)

Get the initial password from the below file
sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Copy the password and paste in the browser.

Then click on install suggested plug-ins. 

Also create user name and password.

enter everything as admin. at least user name as admin password as admin

Click on Save and Finish. Click on start using Jenkins. Now you should see a screen like below:

That's it. You have setup Jenkins successfully. Please watch the steps in our YouTube channel:

Create Freestyle job in Jenkins | How to create Freestyle job in Jenkins to automate build and deployment to Tomcat

Jenkins is popular open source Continuous integration tool. It was written entirely in Java. Jenkins is a self-contained automation server used for automating builds, tests and deployment.

See below the steps for configuring Jenkins to automate the build and deployment for the project we already set up in GitHub. Let us see how to configure Jenkins to automate build and deployment:

pre-requisites:(please do this first before you start)

1. Make sure you configure maven installation under Jenkins-->manage Jenkins-> Global Tool Configuration. under maven installation. enter Maven3 as name, enter path of maven installation --> /usr/share/maven and uncheck install automatically option.

2. Also install SonarQube scanner,  deploy to container,  Jacoco plugins under Jenkins --> Manage Jenkins --> Manage plug-ins

Click on Available, type Sonarqube, select SonarQube scanner. Click on Install without restart.

SonarQube

Deploy to container

JaCoCo

Click on without restart.

3. Generate Personal Access Token(PSA) if you are using GitHub. Click here to learn how to generate that in GitHub and you can use your token as password.

steps to automate MyWebApp project in Jenkins:

1. Login to Jenkins. Click on New item.

2. Enter an item name --> select Free style project.
enter name as myFirstAutomateJob. click OK.

3. under source code mgmt, click git. enter your source code GitHub URL

Click on your repo, Copy the url from the browser. Paste the url as Repository URL below.

under credentials --> click Add- > select Jenkins -->  enter your GitHub userid and your PSA - Personal access token as password. You would have created PSA from pre-requisites (# 3) 

Add description as my SCM credentials.

Enter main as branch specifier or which ever branch you want to check out.

4. select that from drop down.

5. under build trigger click on poll scm, enter this value to check

for every 2 mins --> H/02 * * * *

6. Build --> Add build step --> invoke top level maven targets -->

select Maven3 from drop down and goal as clean install

7. Click on advanced, enter the path of POM file as --> MyWebApp/pom.xml

8. click on Add post build action, select Record Jacoco Code coverage report

  

9. click on Add post build action, select deploy war/ear to container.

 

      for WAR/EAR files enter as 
          **/*.war

in WAR/EAR files, leave context path empty

   10. click on Add container , select Tomcat 9.x

   11. click on add credentials, enter tomcat as user name and password as password.

      select it from drop down.

 

13. tomcat url should be --> http://your_public_dns_name:8080

click Apply, click Save

click on build now..It should build.

if there is any error, please check the console output. Most of the common error would be checking the path of Maven installation, valid credentials for GitHub or Tomcat. Also make sure you install the plug-ins.

After successful deployment, please make sure you check the output in Tomcat by going to browser and enter below URL

http://please_change_per_public_dns_name_of_EC2:8080/MyWebApp

You should see Hello World!!!

This is how you automate the builds and deployments using Jenkins and migrate applications to AWS.

You can watch the video of this lab here: