Getting error while deploying the java spring boot application in the azure function

To resolve this issue, login to Azure by running the below commands in Terminal:

1. az login
2. az account set --subscription <your_subscription_id>

You can also specify the function to use Azure CLI credential explicitly with below configuration under azure-functions-maven-plugin in pom.xml:

<configuration>
     <auth><type>azure_cli</type></auth>
</configuration>

Run the function locally using the commands:

mvn clean install
mvn azure-functions:run

pom.xml:

    <name>Azure Java Functions</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>17</java.version>
        <azure.functions.maven.plugin.version>1.36.0</azure.functions.maven.plugin.version>
        <azure.functions.java.library.version>3.1.0</azure.functions.java.library.version>
        <functionAppName>javafn-1727176226852</functionAppName>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.microsoft.azure.functions</groupId>
            <artifactId>azure-functions-java-library</artifactId>
            <version>${azure.functions.java.library.version}</version>
        </dependency>
        <!-- Test -->
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter</artifactId>
            <version>5.4.2</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-core</artifactId>
            <version>2.23.4</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                    <encoding>${project.build.sourceEncoding}</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>com.microsoft.azure</groupId>
                <artifactId>azure-functions-maven-plugin</artifactId>
                <version>${azure.functions.maven.plugin.version}</version>
                <configuration>
                    <appName>${functionAppName}</appName>
                    <resourceGroup>java-functions-group</resourceGroup>
                    <region>westus</region>
                    <appServicePlanName>java-functions-app-service-plan</appServicePlanName>
                    <runtime>
                        <os>windows</os>
                        <javaVersion>17</javaVersion>
                    </runtime>
                    <appSettings>
                        <property>
                            <name>FUNCTIONS_EXTENSION_VERSION</name>
                            <value>~4</value>
                        </property>
                    </appSettings>
                </configuration>
                <executions>
                    <execution>
                        <id>package-functions</id>
                        <goals>
                            <goal>package</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <!--Remove obj folder generated by .NET SDK in maven clean-->
            <plugin>
                <artifactId>maven-clean-plugin</artifactId>
                <version>3.1.0</version>
                <configuration>
                    <filesets>
                        <fileset>
                            <directory>obj</directory>
                        </fileset>
                    </filesets>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Deploy the function to Azure function app using the command mvn azure-functions:deploy:

C:Usersunamejavafn> mvn azure-functions:deploy
[INFO] Scanning for projects...
[INFO] 
[INFO] ------------------------< com.function:javafn >-------------------------
[INFO] Building Azure Java Functions 1.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- azure-functions:1.36.0:deploy (default-cli) @ javafn ---
[INFO] Auth type: AZURE_CLI
[INFO] Username: uname
[INFO] Subscription: your_subscription(d93XXX-8856-a7f4589e52bc)
[INFO] Start creating Storage Account(d6ac9aXXX46f2b6c8)...
[INFO] Storage Account(d6ac9ab1XXb46f2b6c8) is successfully created.
[WARNING] Skip validation as schema appservice/CreateAppServicePlan was not registered
[INFO] Start creating App Service plan (java-functions-app-service-plan)...
[INFO] App Service plan (java-functions-app-service-plan) is successfully created
[INFO] Set function worker runtime to java.
[INFO] Start creating Function App(javafn-1727176226852)...
[INFO] Function App(javafn-1727176226852) is successfully created
[INFO] Starting deployment...
[INFO] Trying to deploy artifact to javafn-1727176226852...
[INFO] Successfully deployed the artifact to https://javafn-1727176226852.azurewebsites.net
[INFO] Deployment succeed
[INFO] Syncing triggers and fetching function information
[INFO] Querying triggers...
[INFO] HTTP Trigger Urls:
         HttpExample : https://javafn-1727176226852.azurewebsites.net/api/httpexample

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  02:54 min
[INFO] Finished at: 2024-09-24T17:10:53+05:30
[INFO] ------------------------------------------------------------------------

Deployed the function to Azure successfully:

Portal: