Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.

[tangara goh]

Hi Experts,

I am trying to convert a spring framework to Spring Boot web app but keeps getting the error below.

2018-06-15 19:12:49.234  INFO 4124 --- [           main] e.i.d.S.IntegratedSpringApplication      : Starting IntegratedSpringApplication on DESKTOP-1KGGO27 with PID 4124 (C:\Users\\IntegratedSpringDemo\target\classes started by in C:\Users\\IntegratedSpringDemo)
2018-06-15 19:12:49.259  INFO 4124 --- [           main] e.i.d.S.IntegratedSpringApplication      : No active profile set, falling back to default profiles: default
2018-06-15 19:12:49.515  INFO 4124 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@2f05be7f: startup date [Fri Jun 15 19:12:49 SGT 2018]; root of context hierarchy
2018-06-15 19:12:53.847  INFO 4124 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$2611bd2a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-06-15 19:12:54.037  WARN 4124 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
2018-06-15 19:12:54.121  INFO 4124 --- [           main] ConditionEvaluationReportLoggingListener :

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-06-15 19:12:54.158 ERROR 4124 --- [           main] o.s.b.SpringApplication                  : Application run failed

org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:155) ~[spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at com.abc.demo.SpringBootWebApp.IntegratedSpringApplication.main(IntegratedSpringApplication.java:23) [classes/:?]
Caused by: org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean.
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getWebServerFactory(ServletWebServerApplicationContext.java:204) ~[spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:178) ~[spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:152) ~[spring-boot-2.0.2.RELEASE.jar:2.0.2.RELEASE]
... 8 more

I have searched the web and added in the necessary annotation as follows :

@EnableAutoConfiguration
@SpringBootApplication
public class IntegratedSpringApplication extends SpringBootServletInitializer{

	 @Override
	    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
	        return application.sources(IntegratedSpringApplication.class);
	    }

	
	public static void main(String[] args) {
		SpringApplication.run(IntegratedSpringApplication.class, args);
	}
}

I am using Tomcat as external server and has removed the embedded Tomcat in my pom.xml.

Here's is my pom.xml

<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>org.springframework.samples.service.service</groupId>
	<artifactId>IntegratedSpringDemo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.2.RELEASE</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>
	<properties>
		<!-- Generic properties -->
		<java.version>1.8</java.version>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

		<!-- Sitemesh -->
		<sitemesh.version>2.4.2</sitemesh.version>
		<!-- JSon -->
		<json-path.version>2.0.0</json-path.version>


		<!-- Web dependencies -->
		<webjars-bootstrap.version>2.3.0</webjars-bootstrap.version>
		<webjars-jquery-ui.version>1.10.3</webjars-jquery-ui.version>
		<webjars-jquery.version>2.0.3-1</webjars-jquery.version>


	</properties>

	<dependencies>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<type>jar</type>
		</dependency>
		<dependency>
			<groupId>javax.servlet.jsp</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.2</version>
			<scope>provided</scope>
		</dependency>
		<!-- Need this to compile JSP, tomcat-embed-jasper version is not working, 
			no idea why -->
		<dependency>
			<groupId>org.eclipse.jdt.core.compiler</groupId>
			<artifactId>ecj</artifactId>
			<version>4.6.1</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
		</dependency>

		<!-- Provided -->

		<dependency>
			<groupId>org.glassfish.web</groupId>
			<artifactId>jstl-impl</artifactId>
			<version>1.2</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<exclusions>
				<exclusion>
					<artifactId>tomcat-embed-el</artifactId>
					<groupId>org.apache.tomcat.embed</groupId>
				</exclusion>
				<exclusion>
					<artifactId>tomcat-embed-core</artifactId>
					<groupId>org.apache.tomcat.embed</groupId>
				</exclusion>
				<exclusion>
					<artifactId>tomcat-embed-websocket</artifactId>
					<groupId>org.apache.tomcat.embed</groupId>
				</exclusion>
			</exclusions>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		<!-- Exclude Spring Boot's Default Logging -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
			<exclusions>
				<exclusion>
					<groupId>org.springframework.boot</groupId>
					<artifactId>spring-boot-starter-logging</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

		<!-- Add Log4j2 Dependency -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-log4j2</artifactId>
		</dependency>


		<!-- Site Mesh -->
		<dependency>
			<groupId>opensymphony</groupId>
			<artifactId>sitemesh</artifactId>
			<version>${sitemesh.version}</version>
		</dependency>
		<!-- Logging with SLF4J & LogBack -->
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
		</dependency>
	</dependencies>
	<build>
		<plugins>
		<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
</plugin>		
		</plugins>
	</build>
</project>
			

I hope someone can tell me what is wrong cos I have been trying very hard to figure out for the past few hours but to no avail.....

Tks.

[Rob Spoor]

Why did you exclude the embedded Tomcat dependencies? Without those or a replacement, there is no internal web server. Just include them. You should also remove the servlet-api and jsp-api dependencies, Spring Boot provides them (through Tomcat). I'm not sure about jstl though.