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trouble deploying to GCP Functions -GcfJarLauncher class not found

I am trying to deploy a simple Rest API to Google Cloud Functions. Per this documentation, I need the target to always be org.springframework.cloud.function.adapter.gcp.GcfJarLauncher
However when I deploy it using the provided code, I get:
ERROR: (gcloud.alpha.functions.deploy) OperationError: code=3, message=Build failed:
build succeeded but did not produce the class "org.springframework.cloud.function.adapter.gcp.GcfJarLauncher"
specified as the function target: Error: class not found: org.springframework.cloud.function.adapter.gcp.GcfJarLauncher;
Error ID: d818fd83
Here is the code I am running in the Cloud CLI:
gcloud alpha functions deploy function-sample-gcp-http --entry-point org.springframework.cloud.function.adapter.gcp.GcfJarLauncher --runtime java11 --trigger-http --source target/deploy --memory 512MB
Here my code repo but I will include some relevant bits below
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 https://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>2.7.5</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.divr-fx-test</groupId>
<artifactId>divr-function</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>divr-function</name>
<description>Function testing for DIVR</description>
<properties>
<java.version>11</java.version>
<spring-cloud-function.version>4.0.0-SNAPSHOT</spring-cloud-function.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-function-web</artifactId>
<version>3.2.8</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-function-web</artifactId>
<version>3.2.8</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-function-dependencies</artifactId>
<version>3.2.8</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>com.google.cloud.functions</groupId>
<artifactId>functions-framework-api</artifactId>
<version>1.0.4</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-function-adapter-gcp</artifactId>
<version>3.2.8</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<!-- Build an executable JAR -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>com.mypackage.MyClass</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<outputDirectory>target/deploy</outputDirectory>
</configuration>
</plugin>
<plugin>
<groupId>com.google.cloud.functions</groupId>
<artifactId>function-maven-plugin</artifactId>
<version>0.9.1</version>
<configuration
<functionTarget>org.springframework.cloud.function.adapter.gcp.GcfJarLauncher</functionTarget>
<port>8080</port>
</configuration>
</plugin>
</plugins>
</build>
</project>
Main:
package com.fkgcp;
import java.util.function.Function;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
#SpringBootApplication
public class DivrFunctionApplication {
public static void main(String[] args) {
SpringApplication.run(DivrFunctionApplication.class, args);
}
// this part I don't actually want to use, but it is present
// in every tutorial, so I included it to see if it would be
// triggered instead of my REST functions
#Bean
public Function<String, String> uppercase() {
return value -> value.toUpperCase();
}
}
Also, I added a MANIFEST.MF, is it in the right location?
divr-function/src/main/resources/META-INF/MANIFEST.MF
Contents:
Main-Class: com.fkgcp.DivrFunctionApplication
What am I missing?

Reviewing your source code repository, I think the issue can be caused because you need to reference the spring-cloud-function-adapter-gcp library as a dependency of the spring-boot-maven-plugin in addition to include it as a dependency in your pom.xml file:
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<outputDirectory>target/deploy</outputDirectory>
</configuration>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-function-adapter-gcp</artifactId>
</dependency>
</dependencies>
</plugin>
According to the Spring Cloud documentation:
Notice that we also reference spring-cloud-function-adapter-gcp as a
dependency of the spring-boot-maven-plugin. This is necessary because it
modifies the plugin to package your function in the correct JAR format for
deployment on Google Cloud Functions.
In addition, and although probably unrelated, consider remove your maven-jar-plugin configuration from your pom.xml: the spring-boot-maven-plugin already provides all the necessary functionality to generate the jar you need to deploy and the configuration provided by the maven-jar-plugin may be a cause of errors.
On the other hand, your MANIFEST.MF file looks fine to me and it is placed in the right location.

Incompatible dependencies in Spring Boot (Maven)

I have started creating a RESTful API using Spring Boot. I haven't touched Spring in 2 years. I am using Maven. I have the main class:
package com.tsakirogf.smartapi;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class SmartapiApplication
{
public static void main(String[] args)
{
SpringApplication.run(PeopleapiApplication.class, args);
}
}
I have a Controller, Model and Service. This 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 https://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>2.4.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.tsakirogf</groupId>
<artifactId>peopleapi</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>smartapi</name>
<description>Technical Test</description>
<properties>
<java.version>11</java.version>
<!-- <tomcat.version>8.5.63</tomcat.version>-->
</properties>
<dependencies>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.200</version>
<!-- <scope>test</scope>-->
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>2.4.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>2.4.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.4.2</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-commons</artifactId>
<version>2.3.6.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
The project is building successfully and the mvn clean and mvn install commands run successfully as well.
The problem is that when I am trying to run it in IntelliJ I get this error:
2021-02-11 18:19:42.692 ERROR 14584 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
An attempt was made to call a method that does not exist. The attempt was made from the following location:
org.apache.catalina.authenticator.AuthenticatorBase.startInternal(AuthenticatorBase.java:1355)
The following method did not exist:
'java.lang.String javax.servlet.ServletContext.getVirtualServerName()'
The method's class, javax.servlet.ServletContext, is available from the following locations:
jar:file:/F:/Workspace/Uni/SoftwareEngineer/peopleapi/lib/javax.servlet.jar!/javax/servlet/ServletContext.class
jar:file:/C:/Users/Fotis/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.41/tomcat-embed-core-9.0.41.jar!/javax/servlet/ServletContext.class
The class hierarchy was loaded from the following locations:
javax.servlet.ServletContext: file:/F:/Workspace/Uni/SoftwareEngineer/peopleapi/lib/javax.servlet.jar
Action:
Correct the classpath of your application so that it contains a single, compatible version of javax.servlet.ServletContext
Process finished with exit code 1
Any thoughts or directions I should move to? I have tried to synchronize dependencies and tried the latest and RELEASE packages in the pom. I have also deleted the whole m2 repo (twice).

Your problem is F:/Workspace/Uni/SoftwareEngineer/peopleapi/lib/javax.servlet.jar. Check why you have that JAR in your classpath (most likely it comes through some script or so). This seems to be an older version than the one you're referencing in your pom.xml

Custom dependencies are not identified in Spring-Boot

I have two spring-boot project
greeter-library
greeter-spring-boot-autoconfigure
I have created jar file for greeter-library and installed that in my local m2(maven) repository.
Now I am using that jar as a maven dependency in greeter-spring-boot-autoconfigure.But it is stating
Class not found on Greeter.java.
pom.xml for greeter-library
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<artifactId>greeter-library</artifactId>
<groupId>com.xyz.greeter</groupId>
<version>0.0.1-SNAPSHOT</version>
<name>greeter-library</name>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
Now pom.xml for greeter-spring-boot-autoconfigure is as follows
<artifactId>greeter-spring-boot-autoconfigure</artifactId>
<name>greeter-spring-boot-autoconfigure</name>
<groupId>com.xyz</groupId>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.1</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<artifactId>greeter-library</artifactId>
<groupId>com.xyz.greeter</groupId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
But during maven build time for greeter-spring-boot-autoconfigure, it is stating that Greeter.java not found which is part of greeter-library project.
Can anyone has any solution to this?

Since you've added spring-boot-maven-plugin in "greeter-library" module, it will be packaged as a spring boot application. Open it with WinRar/WinZip and you'll see. This is a little bit confusing, but in general spring boot application, although is packed as a JAR is not actually a jar in the sense that JVM can't load it, can't find its classes automatically, etc. For example, it has its dependencies in BOOT-INF/lib folder - this is not the way regular jars work, in fact, spring boot has a bootstrapping code that uses custom class loaders to read the classes from such a structure.
As a consequence of all this, Maven and IDE won't be able to recognize the classes from the greeter-library hence the error. Bootom line, you can't really declare a dependency on a spring boot application from your greater-spring-boot-autoconfigure module.
Now as a solution - why do you need a greeter-library to be a spring boot artifact? Maybe if you just remove the spring-boot-maven-plugin and turn it to the regular jar (with regular dependencies on spring boot infrastructure perhaps) it will work?
If this doesn't help, feel free to share more details in the question to get a more precise solution to the problem...

Some ideas to explore
the first jar "greeter-library" doesnt need to be packed for spring-boot, it can be a normal jar file.
Create a spring.factories file under src/resources/META-INF path. Expose the java classes from this JAR that can be used by "greeter-spring-boot-autoconfigure"

mvn test does not run unit tests in springboot project

I have unit tests in my springboot project in addition to the default application test that comes with the project bundle when I create the project from start.spring.io. When I run mvn test from command line, I see that only the default application tests are run but not the unit tests that I have written. However, I can run these tests from IntelliJ. I am using maven version 3.6.2 and maven surefire plugin version 2.22.2. Can someone let me know what I am missing here? Thanks.
Here's my test class:
#RunWith(SpringRunner.class)
#SpringBootTest
public class BranchServiceUnitTest {
#Autowired
private BranchService branchService;
#MockBean
private BranchRepository branchRepository;
#Test
public void testAddNewBranch() {
Branch testBranch = new Branch();
testBranch.setBranchName("TestBranch");
testBranch.setCity("TestCity");
testBranch.setContactNumber("TestContactNumber");
testBranch.setEmailId("TestEmailId");
Mockito.when(branchRepository.save(testBranch)).thenReturn(testBranch);
Branch addedBranch = branchService.addBranch(testBranch);
assertThat(addedBranch.getCity()).isEqualTo("TestCity");
}
#Test
public void findBranchById() {
Branch testBranch = new Branch();
testBranch.setId(1);
testBranch.setBranchName("TestBranch");
testBranch.setCity("TestCity");
testBranch.setContactNumber("TestContactNumber");
testBranch.setEmailId("TestEmailId");
Mockito.when(branchRepository.findById(testBranch.getId())).thenReturn(java.util.Optional.of(testBranch));
Branch foundBranch = branchService.getBranchById(1);
assertThat(foundBranch.getId()).isEqualTo(1);
}
#Test
public void testGetAllBranches() {
Branch testBranch1 = new Branch();
testBranch1.setId(1);
testBranch1.setBranchName("TestBranch");
testBranch1.setCity("TestCity");
testBranch1.setContactNumber("TestContactNumber");
testBranch1.setEmailId("TestEmailId");
Branch testBranch2 = new Branch();
testBranch2.setId(2);
testBranch2.setBranchName("TestBranch");
testBranch2.setCity("TestCity");
testBranch2.setContactNumber("TestContactNumber");
testBranch2.setEmailId("TestEmailId");
List<Branch> branches = Arrays.asList(testBranch1,testBranch2);
Mockito.when(branchRepository.findAll()).thenReturn(branches);
assertThat(branches.size()).isEqualTo(2);
assertThat(branches.get(0).getId()).isEqualTo(1);
}
}
Following is my pom file:
<?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 https://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>2.2.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.rkasibha</groupId>
<artifactId>rentabook</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>rentabook</name>
<description>Rent a book service</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.modelmapper</groupId>
<artifactId>modelmapper</artifactId>
<version>2.3.6</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

I think its a weird mix of JUnit 4 and Junit 5 that causes the issue:
Spring boot 2.2.6 (I've used start.spring.io to generate a sample application) uses junit 5.
On the other hand, your test is written with #RunWith which means that it uses junit 4 under the hood.
The dependency:
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
also seems suspicious - the spring-boot-starter-test already contains all the required dependencies on JUnit 5, so you don't need this one.
Now in terms of resolution, check out the default test that comes with this sample application (the one you've described in the question). The chances are that it uses JUnit 5 by itself, so you better migrate your test to JUnit 5 and rerun.

This looks spurious.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<includes>
<include>**/*Test*.java</include>
</includes>
</configuration>
</plugin>
What do you hope to gain from using <include>**/*Test*.java</include>? I'm pretty certain the trailing * does not mean zero-or-more characters. It's 1 or more. Documentation
Are there specific classes in your test directory that you want to exclude? If not, I would remove the whole plugin. Surefire is already declared in Maven's implicit parent POM, with sensible defaults that will cover all of your tests. Declaring it yourself is both needlessly verbose and has actively broken something which works out of the box.

If your tests run successfully when ran alone, But not picked up during the
mvn test
Chances are that you might be using an Older Junit package in your tests. Usually the above weird scenario happens when there's a mix up in the Junit version.
If Junit5 is being used, please ensure that the package in imports is
import org.junit.jupiter.api

Spring boot app won't start on Tomcat Server

I am trying to deploy a spring boot application as a WAR to a tomcat server. I can build and deploy the war to the tomcat server just fine. When I start the server though my spring application never runs. The server starts up just fine. I have done everything Spring says to do here,
http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#howto-create-a-deployable-war-file
My project has its own custom Parent POM and consists of 2 modules.
I have read several other similar threads and as far as I can tell I have everything set up properly but clearly something is wrong. Any help would be much appreciated.
THank You!
Parent pom
<groupId>com.project</groupId>
<artifactId>TelematicsNotificationSystem</artifactId>
<name>TelematicsNotificationSystem</name>
<version>1.0.0-SNAPSHOT</version>
<packaging>pom</packaging>
<properties>
<java.version>1.8</java.version>
<artifact-deployer.version>2.0.0-RELEASE</artifact-deployer.version>
<cxf.version>2.5.2</cxf.version>
<start-class>com.project.TNS.TelematicsNotificationSystem</start-class>
</properties>
<modules>
<module>TelematicsNotificationSystem-wsclient</module>
<module>TelematicsNotificationSystem-web</module>
</modules>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
<version>1.5.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>1.5.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
<version>1.5.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
<version>1.5.0.RELEASE</version>
</dependency>
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.5.6</version>
</dependency>
<dependency>
<groupId>org.springframework.ldap</groupId>
<artifactId>spring-ldap-core</artifactId>
<version>1.3.0.RELEASE</version>
</dependency>
</dependencies>
Web Project Pom
<artifactId>TelematicsNotificationSystem-Web</artifactId>
<name>TelematicsNotificationSystem-Web</name>
<packaging>war</packaging>
<parent>
<groupId>com.project</groupId>
<artifactId>TelematicsNotificationSystem</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<properties>
<start-class>com.project.TNS.TelematicsNotificationSystem</start-class>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<resources>
<resource>
<filtering>true</filtering>
<directory>src/main/resources/</directory>
</resource>
</resources>
</configuration>
</plugin>
</plugins>
</build>
My Application Class
package TNS;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;
#SpringBootApplication
public class TelematicsNotificationSystem extends SpringBootServletInitializer{
public static void main(String[] args) {
SpringApplication.run(TelematicsNotificationSystem.class, args);
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(TelematicsNotificationSystem.class);
}
}

Remember to refresh the application once deployed in Tomcat. It may be working well and only a refresh is needed.

Although I agree with Deinum that I needed to clean up my Pom that was not the overall fix. The fix was to simply add a component scan to my class which contained my main method.
#SpringBootApplication
#ComponentScan(basePackageClasses = DashBoardController.class)
public class TelematicsNotificationSystem extends SpringBootServletInitializer
The starting app couldn't find the Controller so it could handle any of my mapping requests.