Spring Boot Application not starting. Error: Stopping Service [Tomcat]

I am not able to run my Spring Boot application with embedded Tomcat. It was working fine till now and I did not make any changes in configuration. When i run the application as Spring Boot App in eclipse the tomcat stops immediately during startup.

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
2019-02-06 14:12:20,103 restartedMain ERROR Console contains an invalid element or attribute ""

  .   ____          _            __ _ _
 /\ / ___'_ __ _ _(_)_ __  __ _    
( ( )___ | '_ | '_| | '_ / _` |    
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |___, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.6.RELEASE)

Feb 06, 2019 2:12:23 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service [Tomcat]
Feb 06, 2019 2:12:23 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/8.5.16
Feb 06, 2019 2:12:24 PM org.apache.jasper.servlet.TldScanner scanJars
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
Feb 06, 2019 2:12:24 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring embedded WebApplicationContext
2019-02-06 14:12:24.946  INFO 9504 --- [  restartedMain] o.h.j.i.u.LogHelper                      : HHH000204: Processing PersistenceUnitInfo [
    name: default
    ...]
2019-02-06 14:12:25.031  INFO 9504 --- [  restartedMain] o.h.Version                              : HHH000412: Hibernate Core {5.0.12.Final}
2019-02-06 14:12:25.034  INFO 9504 --- [  restartedMain] o.h.c.Environment                        : HHH000206: hibernate.properties not found
2019-02-06 14:12:25.036  INFO 9504 --- [  restartedMain] o.h.c.Environment                        : HHH000021: Bytecode provider name : javassist
2019-02-06 14:12:25.089  INFO 9504 --- [  restartedMain] o.h.a.c.Version                          : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2019-02-06 14:12:25.410  INFO 9504 --- [  restartedMain] o.h.d.Dialect                            : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
Feb 06, 2019 2:12:27 PM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service [Tomcat]

I tried restarting machine, eclipse, refreshing project, recreate the .m2 repositories but it did not help me solve the problem.

Below is my configuration information:

Main Class

@SpringBootApplication
@PropertySource(value="classpath:messages.properties")
public class ExampleApplication {

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

}

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.brokerswing</groupId>
    <artifactId>brokerswing</artifactId>
    <version>1.1</version>

    <name>Example</name>
    <description>-</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.6.RELEASE</version>
        <relativePath />
    </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>
        <!-- Spring Web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- Spring Data JPA -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <!-- Spring Email -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>

        <!-- Spring Security -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>

        <!-- Spring Development Tools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- MySQL -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- Servlet+JSP+JSTL -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

        <!-- Need this to compile JSP -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.13</version>
        </dependency>

        <!-- Commons Collection -->
        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
        </dependency>

        <!-- Simple Java Mail -->
        <!-- <dependency> <groupId>org.simplejavamail</groupId> <artifactId>simple-java-mail</artifactId> 
            <version>4.4.5</version> </dependency> -->

        <!-- Java Mail and JAF -->
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.4.7</version>
            <scope>provided</scope>
        </dependency>

        <!-- Apache Velocity -->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity</artifactId>
            <version>1.7</version>
        </dependency>

        <!-- Apache Log4j 2 -->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-jcl</artifactId>
        </dependency>

        <!-- Excel library -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.6</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.6</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <packaging>war</packaging>

</project>

Application.properties

# IDENTITY (ContextIdApplicationContextInitializer)
spring.application.name=Example

server.port=80
#debug=true

# SPRING MVC (WebMvcProperties)
spring.mvc.date-format=DD/MM/YYYY

# JDBC Connection
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/brokerswing?useSSL=false
spring.datasource.username=root
spring.datasource.password=root


# JPA (JpaBaseConfiguration, HibernateJpaAutoConfiguration)
spring.jpa.hibernate.ddl-auto=none
spring.jpa.show-sql=false   
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate5.SpringSessionContext


# DEVTOOLS (DevToolsProperties)
spring.devtools.restart.enabled=true
spring.devtools.restart.exclude=META-INF/maven/**,META-INF/resources/**,resources/**,static/**,public/**,templates/**,**/*Test.class,**/*Tests.class,git.properties,META-INF/build-info.properties
spring.devtools.restart.poll-interval=5000
spring.devtools.restart.quiet-period=1000

Answer

The error you get seems related to SLF4J

Try adding the below dependencies in your pom.xml

  <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
       <version>1.7.5</version>
   </dependency>
   <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-log4j12</artifactId>
       <version>1.7.5</version>
   </dependency>