azure-functions-maven-plugin final jar missing libraries in classpath - spring-boot

Question

I am try to deploy Java Azure function app from my local machine. My tech stack is fallows,
Azure Function App OS: Linux
Azure Functions Core Tools (2.0.3)
Springboot 2.6.3
spring-boot-maven-plugin 2.6.3
azure-functions-maven-plugin 1.14.3
azure-functions-java-library 1.4.2
spring-cloud-function-adapter-azure 3.2.1
Here is my pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.avol.func</groupId>
<artifactId>springcloud-eh-func</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>Azure Java Functions</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>11</java.version>
<azure.functions.maven.plugin.version>1.14.3</azure.functions.maven.plugin.version>
<azure.functions.java.library.version>1.4.2</azure.functions.java.library.version>
<functionAppName>poc-java-func-apsp</functionAppName>
<resource.groupname>AvolPOCs</resource.groupname>
<appserviceplan.name>ASP-AvolPOCs-84f2</appserviceplan.name>
<azure.region>southcentralus</azure.region>
<azure.subscriptionid>xxxxxx</azure.subscriptionid>
<stagingDirectory>${project.build.directory}/azure-functions/${functionAppName}</stagingDirectory>
<start-class>com.avol.func.SpringAppRunner</start-class>
</properties>
<dependencies>
<dependency>
<groupId>com.microsoft.azure.functions</groupId>
<artifactId>azure-functions-java-library</artifactId>
<version>${azure.functions.java.library.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-function-adapter-azure</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>com.microsoft.azure</groupId>
<artifactId>applicationinsights-spring-boot-starter</artifactId>
<version>2.6.3</version>
</dependency>
<dependency>
<groupId>com.microsoft.azure</groupId>
<artifactId>applicationinsights-logging-logback</artifactId>
<version>2.6.3</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.22</version>
</dependency>
<!-- Test -->
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>4.2.0</version>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-function-dependencies</artifactId>
<version>3.2.1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.microsoft.azure.functions</groupId>
<artifactId>azure-functions-java-library</artifactId>
<version>${azure.functions.java.library.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<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>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<filesets>
<fileset>
<directory>obj</directory>
</fileset>
</filesets>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>3.2.0</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${stagingDirectory}/lib</outputDirectory>
<overWriteReleases>false</overWriteReleases>
<overWriteSnapshots>false</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
<includeScope>runtime</includeScope>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.microsoft.azure</groupId>
<artifactId>azure-functions-maven-plugin</artifactId>
<version>${azure.functions.maven.plugin.version}</version>
<configuration>
<subscriptionId>${azure.subscriptionid}</subscriptionId>
<!-- function app name -->
<appName>${functionAppName}</appName>
<!-- function app resource group -->
<resourceGroup>${resource.groupname}</resourceGroup>
<!-- function app service plan name -->
<appServicePlanName>${appserviceplan.name}</appServicePlanName>
<!-- function app region-->
<!-- refers https://github.com/microsoft/azure-maven-plugins/wiki/Azure-Functions:-Configuration-Details#supported-regions for all valid values -->
<region>${azure.region}</region>
<!-- function pricingTier, default to be consumption if not specified -->
<!-- refers https://github.com/microsoft/azure-maven-plugins/wiki/Azure-Functions:-Configuration-Details#supported-pricing-tiers for all valid values -->
<!-- <pricingTier></pricingTier> -->
<!-- Whether to disable application insights, default is false -->
<disableAppInsights>false</disableAppInsights>
<runtime>
<os>linux</os>
<javaVersion>11</javaVersion>
</runtime>
<appSettings>
<property>
<name>FUNCTIONS_EXTENSION_VERSION</name>
<value>~4</value>
</property>
<property>
<name>FUNCTIONS_WORKER_RUNTIME</name>
<value>java</value>
</property>
</appSettings>
</configuration>
<executions>
<execution>
<id>package-functions</id>
<goals>
<goal>package</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>3.2.0</version>
<executions>
<execution>
<id>copy-resources</id>
<phase>package</phase>
<goals>
<goal>copy-resources</goal>
</goals>
<configuration>
<overwrite>true</overwrite>
<outputDirectory>
${project.build.directory}/azure-functions/${functionAppName}
</outputDirectory>
<resources>
<resource>
<directory>${project.basedir}/src/main/resources
</directory>
<includes>
<include>**</include>
</includes>
</resource>
</resources>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.6.3</version>
<dependencies>
<dependency>
<groupId>org.springframework.boot.experimental</groupId>
<artifactId>spring-boot-thin-layout</artifactId>
<version>1.0.28.RELEASE</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
Here is my maven build logs,
$ mvn clean package
[INFO] Scanning for projects...
[INFO]
[INFO] ----------------< com.avol.func:springcloud-eh-func >----------------
[INFO] Building Azure Java Functions 1.0.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:3.1.0:clean (default-clean) # springcloud-eh-func ---
[INFO] Deleting C:\Users\padaldl\workspace\projects\Avol-POCs\src\Java\JavaFunAppPOC\springcloud-eh-func\target
[INFO]
[INFO] --- maven-resources-plugin:3.2.0:resources (default-resources) # springcloud-eh-func ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Using 'UTF-8' encoding to copy filtered properties files.
[INFO] Copying 1 resource
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) # springcloud-eh-func ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 10 source files to C:\Users\padaldl\workspace\projects\Avol-POCs\src\Java\JavaFunAppPOC\springcloud-eh-func\target\classes
[INFO]
[INFO] --- maven-resources-plugin:3.2.0:testResources (default-testResources) # springcloud-eh-func ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Using 'UTF-8' encoding to copy filtered properties files.
[INFO] skip non existing resourceDirectory C:\Users\padaldl\workspace\projects\Avol-POCs\src\Java\JavaFunAppPOC\springcloud-eh-func\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) # springcloud-eh-func ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) # springcloud-eh-func ---
[INFO] No tests to run.
[INFO]
[INFO] --- maven-dependency-plugin:3.2.0:copy-dependencies (copy-dependencies) # springcloud-eh-func ---
[INFO] Copying azure-functions-java-library-1.4.2.jar to C:\Users\padaldl\workspace\projects\Avol-POCs\src\Java\JavaFunAppPOC\springcloud-eh-func\target\azure-functions\poc-java-func-apsp\lib\azure-functions-java-library-1.4.2.jar
[INFO]
[INFO] --- maven-jar-plugin:3.2.2:jar (default-jar) # springcloud-eh-func ---
[INFO] Building jar: C:\Users\padaldl\workspace\projects\Avol-POCs\src\Java\JavaFunAppPOC\springcloud-eh-func\target\springcloud-eh-func-1.0.0-SNAPSHOT.jar
[INFO]
[INFO] --- azure-functions-maven-plugin:1.14.3:package (package-functions) # springcloud-eh-func ---
[INFO] Java home : C:/Users/padaldl/workspace/installedsws/zulu-11-azure-jdk_11.52.13-11.0.13-win_x64
[INFO] Artifact compile version : 11
[INFO]
[INFO] Step 1 of 8: Searching for Azure Functions entry points
[INFO] 2 Azure Functions entry point(s) found.
[INFO]
[INFO] Step 2 of 8: Generating Azure Functions configurations
[INFO] Generation done.
[INFO]
[INFO] Step 3 of 8: Validating generated configurations
[INFO] Validation done.
[INFO]
[INFO] Step 4 of 8: Saving host.json
[INFO] Successfully saved to C:\Users\padaldl\workspace\projects\Avol-POCs\src\Java\JavaFunAppPOC\springcloud-eh-func\target\azure-functions\poc-java-func-apsp\host.json
[INFO]
[INFO] Step 5 of 8: Saving local.settings.json
[INFO] Successfully saved to C:\Users\padaldl\workspace\projects\Avol-POCs\src\Java\JavaFunAppPOC\springcloud-eh-func\target\azure-functions\poc-java-func-apsp\local.settings.json
[INFO]
[INFO] Step 6 of 8: Saving configurations to function.json
[INFO] Starting processing function: uppercase
[INFO] Successfully saved to C:\Users\padaldl\workspace\projects\Avol-POCs\\src\Java\JavaFunAppPOC\springcloud-eh-func\target\azure-functions\poc-java-func-apsp\uppercase\function.json
[INFO] Starting processing function: assetSync
[INFO] Successfully saved to C:\Users\padaldl\workspace\projects\Avol-POCs\src\Java\JavaFunAppPOC\springcloud-eh-func\target\azure-functions\poc-java-func-apsp\assetSync\function.json
[INFO]
[INFO] Step 7 of 8: Copying JARs to staging directoryC:\Users\padaldl\workspace\projects\Avol-POCs\src\Java\JavaFunAppPOC\springcloud-eh-func\target\azure-functions\poc-java-func-apsp
[INFO] Copied successfully.
[INFO] Step 8 of 8: Installing function extensions if needed
[INFO] Extension bundle specified, skip install extension
[INFO] Successfully built Azure Functions.
[INFO]
[INFO] --- maven-resources-plugin:3.2.0:copy-resources (copy-resources) # springcloud-eh-func ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Using 'UTF-8' encoding to copy filtered properties files.
[INFO] Copying 2 resources
[INFO]
[INFO] --- spring-boot-maven-plugin:2.6.3:repackage (repackage) # springcloud-eh-func ---
[INFO] Replacing main artifact with repackaged archive
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 29.790 s
[INFO] Finished at: 2022-02-03T19:39:15+05:30
[INFO] ------------------------------------------------------------------------
Function App works fine in local from IntellIJ IDEA, and as well run through mvn azure-functions:run command.
When I run the jar using java command java -jar <> it fails with error No Class Definition found error.
mvn azure-functions:deploy succeeded without any issue, and am able to see functions created on azure, but when I trigger function it fails with 500 Internal Error.
I suspect function failing in azure due to external dependencies not added to classpath of jar. From the stackoverflow I found similar question here, suggestion is to go with maven assembly plugin, but my question is why should we use Assembly plugin when I am using springboot plugin?

Answer 1

Finally issue got resolved after installing Azure Functions Core Tools version 4.x through MSI installer on windows.
https://learn.microsoft.com/en-us/azure/azure-functions/functions-run-local?tabs=v4%2Cwindows%2Ccsharp%2Cportal%2Cbash#v2
And it looks like azure functions refer /lib folder under staging directory when function triggers, it need not be springboot fat jar.