unable to deploy spring boot app on tomcat

Question

I was trying to deploy spring boot micro-service on the tomcat server but was unable to get any response. The url was showing 404 error then I decided to go from very basic so I created a simple spring boot project with Spring Boot Initializer. There I choose

war as packaging.
java version 16 (as I only have this on my machine).
Added Spring Web dependency.

With this setting spring initializer automatically added necessary stuff like war packaging, tomcat dependency, spring web dependency and also created ServletInitializer class for me. After that I opened the downloading project in netbeans 12 and made just a few changes i.e.

Added main class in the pom.xml file with <start-class> tag and annotated main class with @RestController and exposed 1 endpoint which return simple string.
Then from the project's main folder I ran the command mvn package also tried mvn clean install as deployment with the 1st command was unsuccessful.

Here are my configuration
Environment Variables:
System Variables

CATALINA_HOME: D:\Inzimam Tariq\apache-tomcat-10.0.10.
JAVA_HOME: C:\Program Files\Java\jdk-16.0.2
Relevent values in Path Variable: C:\Program Files\Common Files\Oracle\Java\javapath, D:\Inzimam Tariq\apache-maven-3.8.2\bin, and C:\Program Files\Java\jdk-16.0.2\bin.

User Variable

MAVEN_HOME: D:\Inzimam Tariq\apache-maven-3.8.2\bin.

I'm using windows 10 64-bit. Tomcat manager shows the app as deployed but when I click on that it shows 404. My JDK folder does not show JRE folder so I searched over internet and found that Java does not include JRE now. I also tried to rename my war file to the project name as some articles suggested that i.e. abc.war from abc-0.0.1-SNAPSHOT but still error is the same.

Please can someone point me to the right direction? Regards

Do you have an index page in your application? Did you check tomcat logs (server and error)? — aksappy, Sep 02 '21 at 20:25
@aksappy its a rest api app so it has a public endpoint not an index page — Inzimam Tariq IT, Sep 02 '21 at 20:29

An student · Answer 1 · 2021-09-03T00:09:53.163

After Deploying your project war file in Tomcat, try to make the following changes in your POM.xml file. Then restart your tomcat. Probably it will work.

 <dependency>
            <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-starter-data-jpa</artifactId>    
                        <exclusions>
                        <exclusion>
                        <groupId>com.zaxxer</groupId>
                        <artifactId>HikariCP</artifactId>
                        </exclusion>
 </exclusions>
                </dependency>

                <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>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>

unable to deploy spring boot app on tomcat

1 Answers1