I have been struggling with this for about a week and nothing I have seen on SO has worked for me. I have a REST API built on Spring Boot that I am trying to deploy to the Google App Engine. Running locally is fine and when I run it on the GAE emulator it works fine as well; however, once I deploy using mvn appengine:deploy I get a successful build but when trying the endpoints I only get a 502. I'm not sure where the logs are so this is really kicking my butt.
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>
<groupId>com.mycompany.admin</groupId>
<artifactId>admin-api</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!-- Exclude this for deployment only -->
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- other project dependencies -->
<dependency>
<groupId>com.google.firebase</groupId>
<artifactId>firebase-admin</artifactId>
<version>5.3.0</version>
</dependency>
<dependency>
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>1.10.2</version>
</dependency>
<!-- end other project specific dependencies -->
<!-- Dependencies provided during deployment -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jul-to-slf4j</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<scope>provided</scope>
</dependency>
<!-- End dependencies for deployment -->
<!-- Dependencies for local -->
<!-- <dependency> -->
<!-- <groupId>org.springframework.boot</groupId> -->
<!-- <artifactId>spring-boot-starter-tomcat</artifactId> -->
<!-- <scope>provided</scope> -->
<!-- </dependency> -->
<!-- End dependencies for local -->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>com.google.cloud.tools</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>1.3.1</version>
<configuration>
<project>project-id-from-GAE-here</project
</configuration>
</plugin>
</plugins>
</build>
</project>
My application class is a simple annotated @SpringBootApplication class. I have 2 controllers with annotation of @RestController and simple @RequestMapping methods. One of the REST controllers is for the /_ah/health endpoint that returns 200 since one post mentioned constant restarts being triggered by the lack of a healthcheck endpoint.
I have a simple application.yml for my value injections and created an app.yaml file placed in src/main/appengine
runtime: java
env: flexible
threadsafe: true
manual_scaling:
instances: 1
handlers:
- url: /.*
script: this field is required, but ignored
runtime_config:
jdk: openjdk8
I am at a complete loss on this. It is my first GAE deployment with hopefully more to go. (I also am not using Docker yet since I am on a Windows 10 machine that breaks when I load Docker on it.)
UPDATE I did notice that I had forgotten to put my project id under the maven plugin. Once I did that I got errors about not finding the app.yaml. I realized that since I am using a flexible environment, I did not need the appengine-web.xml and I had my file misnamed as app.yml rather than app.yaml. I updated my question with this and I am still getting a 502 after a successful deployment.
