Unable to deploy Spring application in App Engine - google-app-engine

Question

I am trying to deploy PetClinic(Spring application) in App Engine. I have added plugins and dependencies.
*<plugin>
<groupId>com.google.cloud.tools</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>1.3.1</version>
</plugin>*
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jul-to-slf4j</artifactId>
<scope>provided</scope>
</dependency>
It is running while I ran locally using ./mvnw -DskipTests appengine:run. However, it did not deploy to App Engine when I ran /mvnw -DskipTests appengine:deploy. I'm getting an error related to BeanCreationexception (Error creating bean with name 'entityManagerFactory' defined in class path resource). How can I resolve this issue?

Answer 1

Have you tried going through the code lab tutorial for deploying a Spring boot application to app engine?
https://codelabs.developers.google.com/codelabs/cloud-app-engine-springboot/index.html
Also this github repository will be a useful reference:
https://github.com/GoogleCloudPlatform/getting-started-java/tree/master/appengine-standard-java8/springboot-appengine-standard
As for your specific error. I would investigate which dependencies are bringing in the entitymanager, and what you may be missing. Starting with exactly what is causing the creation exception.