# Spring Boot App Failing to Start in Azure DevOps CD Pipeline – Need Insights! **URL:** \ **Category:** Using Jenkins\ **Tags:** question, java, pipeline\ **Created:** [February 4, 2025, 5:41pm UTC](https://community.jenkins.io/t/spring-boot-app-failing-to-start-in-azure-devops-cd-pipeline-need-insights/26569 "2025-02-04T17:41:38Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![pratul233](https://avatars.discourse-cdn.com/v4/letter/p/d78d45/32.png) [@pratul233](https://community.jenkins.io/u/pratul233)\ **Post date:** [February 4, 2025, 5:41pm UTC](https://community.jenkins.io/t/spring-boot-app-failing-to-start-in-azure-devops-cd-pipeline-need-insights/26569/1 "2025-02-04T17:41:38Z")
Spring Boot App Failing to Start in Azure DevOps CD Pipeline – Need Insights! Hey Tech Community! I’m working on a CI/CD pipeline in Azure DevOps by using Jenkins as my build pipeline to deploy a Spring Boot application on an Azure LinuxVM. The Build Pipeline with Jenkins (using service hook) & deployment to Azure Linux VM was successful initially, but I faced an issue accessing the app via the browser. Here’s my BUILD Repository which I picked from Online: > **[GitHub - prak233/springBoot233: contains Spring Boot Files](https://github.com/prak233/springBoot233)** > > contains Spring Boot Files After tweaking the script, the pipeline now **fails at the application start up stage** , throwing the error: 🔴 “Spring Boot application failed to start.” 🔴 “JAR file not found!” (even though the file is present in `/home/pratul/deploy/`) ### **🛠 Debugging Steps Tried So Far:** ✅ Verified Java is installed(`openjdk version "17.0.13"`) ✅ Checked if **the JAR file exists** (`ls -l` confirms it’s there) ✅ Tried manually startingthe app: `java -jar spring-boot-initial-0.0.1-SNAPSHOT.jar` ✅ Used `netstat -tulnp | grep 8080` to check if the port is in use ✅ Killed existing processes on port **8080** before restart getting this error even though correct path is given with correct permission as -rw in user level ### **📌 YAML Deployment Script (Relevant Snippet)** `yaml Script` - task: AzureCLI@2 displayName: ‘Install Java & Start Spring Boot Application’ inputs: azureSubscription: ‘Pay-As-You-Go’ scriptType: ‘bash’ scriptLocation: ‘inlineScript’ inlineScript: | VM\_IP=‘52.229.163.139’ USERNAME=‘pratul’ SSH\_KEY\_PATH=‘/azagent/revisit-linuxVM\_key.pem’ ssh -i $SSH\_KEY\_PATH -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $USERNAME@$VM\_IP \<\< ‘EOF’ set -ex DEPLOY\_DIR=“/home/$USERNAME/deploy” JAR\_FILE=“spring-boot-initial-0.0.1-SNAPSHOT.jar” # Kill existing process on port 8080 sudo fuser -k 8080/tcp || true # Start the application nohup java -Xmx512m -Xms256m -jar $DEPLOY\_DIR/$JAR\_FILE \> $DEPLOY\_DIR/app.log 2\>&1 & sleep 5 # Verify if the process is running if pgrep -f “$JAR\_FILE”; then echo “✅Spring Boot application started successfully!” else echo “❌ERROR: Spring Boot application failed to start.” echo “📄App Log:” cat $DEPLOY\_DIR/app.log exit 1 fi EOF ````auto Files present in “/home/pratul/deploy” ###Possible Causes? - File permission issues? (`chmod +x` didn't help) - Java process starting but failing silently? - Any missing dependencies? Has anyone encountered this issue before? What could be causing the failure despite the JAR file being present? Any insights or debugging tips would be greatly appreciated! 🚀 #AzureDevOps #SpringBoot #CI_CD #DevOps #Azure #Linux #TechHelp #CloudComputing ```For reference here’s the full script:``` trigger: - none pool: vmImage: windows-latest stages: - stage: BuildStage displayName: BuildStage jobs: - job: CIJob displayName: "Jenkins Build JOB" steps: - task: JenkinsQueueJob@2 displayName: "Queue Task" inputs: serverEndpoint: 'Jenkins-SRC' jobName: 'revisit-CICD' isMultibranchJob: true multibranchPipelineBranch: 'feature/test' captureConsole: true capturePipeline: true isParameterizedJob: false - task: JenkinsDownloadArtifacts@2 displayName: "Download Artifact Task" inputs: jenkinsServerConnection: 'Jenkins-SRC' jobName: 'revisit-CICD' saveTo: '$(Build.StagingDirectory)' jenkinsBuild: 'LastSuccessfulBuild' - task: PublishBuildArtifacts@1 displayName: "Publish Artifact Task" inputs: PathtoPublish: '$(Build.StagingDirectory)' ArtifactName: 'drop' publishLocation: 'Container' - stage: DeployStage dependsOn: BuildStage displayName: DeployStage jobs: - deployment: deploytoVM displayName: 'deploytoVM' environment: name: 'MyEnv' resourceType: VirtualMachine tags: 'linux' strategy: runOnce: deploy: steps: - task: DownloadPipelineArtifact@2 displayName: "Download Pipeline Build Artifact" inputs: artifactName: drop targetPath: '$(pipeline.artifact)' - task: AzureCLI@2 displayName: 'Copy Files to Linux VM' inputs: azureSubscription: 'Pay-As-You-Go(52ebb814-d1d8-427b-badb-92e9e2108392)' scriptType: 'bash' scriptLocation: 'inlineScript' inlineScript: | # Define variables ARTIFACT_PATH="/azagent/_work/1/drop/initial/target/spring-boot-initial-0.0.1-SNAPSHOT.jar" VM_IP='52.229.163.139' USERNAME='pratul' SSH_KEY_PATH='/azagent/revisit-linuxVM_key.pem' ls -l $SSH_KEY_PATH ls -l $ARTIFACT_PATH mkdir -p /home/$USERNAME/deploy/ # chmod 664 /home/$USERNAME/deploy/ # Copy JAR file to the Linux VM scp -i $SSH_KEY_PATH -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $ARTIFACT_PATH $USERNAME@$VM_IP:/home/$USERNAME/deploy/ - task: AzureCLI@2 displayName: 'Install Java & Start Spring Boot Application' inputs: azureSubscription: 'Pay-As-You-Go(52ebb814-d1d8-427b-badb-92e9e2108392)' scriptType: 'bash' scriptLocation: 'inlineScript' inlineScript: | VM_IP='52.229.163.139' USERNAME='pratul' SSH_KEY_PATH='/azagent/revisit-linuxVM_key.pem' ssh -i _KEY_PATH -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null $USERNAME@$VM_IP << 'EOF' set -ex DEPLOY_DIR="/home/$USERNAME/deploy" JAR_FILE="spring-boot-initial-0.0.1-SNAPSHOT.jar" # Kill any existing process on port 8080 sudo fuser -k 8080/tcp || true # Start the application and log output nohup java -Xmx512m -Xms256m -jar \$DEPLOY_DIR/\$JAR_FILE > \$DEPLOY_DIR/app.log 2>&1 & sleep 5 # Check if the process started if pgrep -f "\$JAR_FILE"; then echo "✅ Spring Boot application started successfully!" else echo "❌ ERROR Spring Boot application failed to start." echo "📄 App Log:" cat \$DEPLOY_DIR/app.log exit 1 fi EOF ```` SCREENSHOTS FOR REFERENCE ![Picture1](https://europe1.discourse-cdn.com/flex013/uploads/jenkins/original/2X/3/3eb58a55f6852b5325b67ff0c904ba9b6ff879c9.png) ![Picture2](https://europe1.discourse-cdn.com/flex013/uploads/jenkins/original/2X/4/4322fd466e1e151f8b2417ed5cee359e4f17d8e0.png) ![Picture3](https://europe1.discourse-cdn.com/flex013/uploads/jenkins/original/2X/1/195dec0aa5fade57a59a3cd2fdb0edbc32988230.png) ![Picture4](https://europe1.discourse-cdn.com/flex013/uploads/jenkins/original/2X/b/be3cfa34e29bbbf28605fc209cffe79997b07f02.png)