embedded tomcat not working on spring boot 2.0.1 - spring-boot

I'm a newbie to the Spring Boot. So Today I started working on Spring Boot 2.0.1 Version. But when I run the Spring Boot application it will not load the embedded tomcat. I'm using Spring Boot Hello world example taken from Spring Boot reference documentation. My Tomcat version was 9, and Java version is 10.0.1.
I'm running the Spring boot in the following way:
start.spring.io and Click on the Generate Project on "MAVEN" with "JAVA" and Spring Boot "2.0.1"
Group "com.globomatics" and artifact "bike"
Dependencies "web"
After that, I click on the "Switch To full version" tab
And changing the Java version 8 to 10
Finally "Click on the Generate Project"
Import maven existing project...
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.globomatics</groupId>
<artifactId>bike</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>bike</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.1.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>10</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
under src/main/java/BikeApplicaton.java
package com.globomatics.bike;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
#RestController
#SpringBootApplication
public class BikeApplication {
#RequestMapping("/")
String home() {
return "Hello World!";
}
public static void main(String[] args) {
SpringApplication.run(BikeApplication.class, args);
}
}
and running the application as "Java Application" and it gives the output in the following way:
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.0.1.RELEASE)
2018-05-07 12:06:18.348 INFO 3640 --- [ main] com.globomatics.bike.BikeApplication : Starting BikeApplication on siva-PC with PID 3640 (started by siva in E:\Udemy Course Ae\SPRING WITH SPRING BOOT AT LYNDA\demo)
2018-05-07 12:06:18.352 INFO 3640 --- [ main] com.globomatics.bike.BikeApplication : No active profile set, falling back to default profiles: default
2018-05-07 12:06:18.412 INFO 3640 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext#5e21e98f: startup date [Mon May 07 12:06:18 IST 2018]; root of context hierarchy
2018-05-07 12:06:18.593 INFO 3640 --- [ main] com.globomatics.bike.BikeApplication : Started BikeApplication in 0.715 seconds (JVM running for 1.434)
2018-05-07 12:06:18.598 INFO 3640 --- [ Thread-0] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext#5e21e98f: startup date [Mon May 07 12:06:18 IST 2018]; root of context hierarchy

Related

Spring Boot Embedded Tomcat not starting when using spring boot 2.6.2 and above

I start a new spring boot application based on the spring boot 2.6.2. The application is very simple, just helloworld with web-mvc and spring-security. I have done it several times before, but this time the tomcat doesn't start up when the application runs. The pom.xml is as below:
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.demo</groupId>
<artifactId>spring-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring-demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
And the console is as below when the application starts:
"C:\Program Files\Java\jdk1.8.0_301\bin\java.exe" -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2020.3.2\lib\idea_rt.jar=12156:C:\Program Files\JetBrains\IntelliJ IDEA 2020.3.2\bin" -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_301\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_301\jre\lib\rt.jar;E:\code\example\java\spring-demo\target\classes;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot-starter-security\2.6.3\spring-boot-starter-security-2.6.3.jar;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot-starter\2.6.3\spring-boot-starter-2.6.3.jar;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot\2.6.3\spring-boot-2.6.3.jar;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.6.3\spring-boot-autoconfigure-2.6.3.jar;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.6.3\spring-boot-starter-logging-2.6.3.jar;C:\Users\Administrator\.m2\repository\ch\qos\logback\logback-classic\1.2.10\logback-classic-1.2.10.jar;C:\Users\Administrator\.m2\repository\ch\qos\logback\logback-core\1.2.10\logback-core-1.2.10.jar;C:\Users\Administrator\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.17.1\log4j-to-slf4j-2.17.1.jar;C:\Users\Administrator\.m2\repository\org\apache\logging\log4j\log4j-api\2.17.1\log4j-api-2.17.1.jar;C:\Users\Administrator\.m2\repository\org\slf4j\jul-to-slf4j\1.7.33\jul-to-slf4j-1.7.33.jar;C:\Users\Administrator\.m2\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;C:\Users\Administrator\.m2\repository\org\yaml\snakeyaml\1.29\snakeyaml-1.29.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-aop\5.3.15\spring-aop-5.3.15.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-beans\5.3.15\spring-beans-5.3.15.jar;C:\Users\Administrator\.m2\repository\org\springframework\security\spring-security-config\5.6.1\spring-security-config-5.6.1.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-context\5.3.15\spring-context-5.3.15.jar;C:\Users\Administrator\.m2\repository\org\springframework\security\spring-security-web\5.6.1\spring-security-web-5.6.1.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-expression\5.3.15\spring-expression-5.3.15.jar;C:\Users\Administrator\.m2\repository\org\springframework\boot\spring-boot-starter-json\2.6.3\spring-boot-starter-json-2.6.3.jar;C:\Users\Administrator\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.13.1\jackson-databind-2.13.1.jar;C:\Users\Administrator\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.13.1\jackson-annotations-2.13.1.jar;C:\Users\Administrator\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.13.1\jackson-core-2.13.1.jar;C:\Users\Administrator\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.13.1\jackson-datatype-jdk8-2.13.1.jar;C:\Users\Administrator\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.13.1\jackson-datatype-jsr310-2.13.1.jar;C:\Users\Administrator\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.13.1\jackson-module-parameter-names-2.13.1.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-web\5.3.15\spring-web-5.3.15.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-webmvc\5.3.15\spring-webmvc-5.3.15.jar;C:\Users\Administrator\.m2\repository\org\slf4j\slf4j-api\1.7.33\slf4j-api-1.7.33.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-core\5.3.15\spring-core-5.3.15.jar;C:\Users\Administrator\.m2\repository\org\springframework\spring-jcl\5.3.15\spring-jcl-5.3.15.jar;C:\Users\Administrator\.m2\repository\org\springframework\security\spring-security-core\5.6.1\spring-security-core-5.6.1.jar;C:\Users\Administrator\.m2\repository\org\springframework\security\spring-security-crypto\5.6.1\spring-security-crypto-5.6.1.jar" com.demo.springdemo.SpringDemoApplication
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.6.3)
2022-01-22 23:39:59.885 INFO 47256 --- [ main] c.c.springdemo.SpringDemoApplication : Starting SpringDemoApplication using Java 1.8.0_301 on 5YUOP71L7Z3I7K5 with PID 47256 (E:\code\example\java\spring-demo\target\classes started by Administrator in E:\code\example\java\spring-demo)
2022-01-22 23:39:59.887 INFO 47256 --- [ main] c.c.springdemo.SpringDemoApplication : No active profile set, falling back to default profiles: default
2022-01-22 23:40:00.295 INFO 47256 --- [ main] c.c.springdemo.SpringDemoApplication : Started SpringDemoApplication in 0.642 seconds (JVM running for 1.088)
Process finished with exit code 0
I am sure the problem has something to do with spring boot version 2.6.2. Because when I change the version to 2.6.1 and below, everything is ok as usual. And version 2.6.3 doesn't work either. That's really an unexpected trap. Is there anyone who knows anything about it?
ps:The code is as below:
package com.demo.springdemo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
#RestController
#SpringBootApplication
public class SpringDemoApplication {
#GetMapping("/")
public String hello() {
return "hello";
}
public static void main(String[] args) {
SpringApplication.run(SpringDemoApplication.class, args);
}
}
Please try after adding this dependency:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>

Spring boot cloud config client not picking up cloud config with error message: no suitable HttpMessageConverter found?

I'm trying to connect my Spring Boot app "config-test" to the Springframework‘s Cloud config server. Instead of picking up the application's configuration it answers with an error and aborts the application (because of the fail-fast option):
Could not extract response: no suitable HttpMessageConverter found for response type [class org.springframework.cloud.config.environment.Environment] and content type [text/html;charset=UTF-8]
Connecting to the config server it says:
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.3.0.RELEASE)
2021-02-21 17:41:32.950 INFO 1891 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://localhost:8081
2021-02-21 17:41:33.230 ERROR 1891 --- [ main] o.s.boot.SpringApplication : Application run failed
java.lang.IllegalStateException: Could not locate PropertySource and the fail fast property is set, failing
at org.springframework.cloud.config.client.ConfigServicePropertySourceLocator.locate(ConfigServicePropertySourceLocator.java:148) ~[spring-cloud-config-client-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.cloud.bootstrap.config.PropertySourceLocator.locateCollection(PropertySourceLocator.java:52) ~[spring-cloud-context-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.cloud.config.client.ConfigServicePropertySourceLocator.locateCollection(ConfigServicePropertySourceLocator.java:163) ~[spring-cloud-config-client-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.cloud.bootstrap.config.PropertySourceBootstrapConfiguration.initialize(PropertySourceBootstrapConfiguration.java:97) ~[spring-cloud-context-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.applyInitializers(SpringApplication.java:626) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:370) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.0.RELEASE.jar:2.3.0.RELEASE]
at com.lhsystems.cdb.logging_test.DynamicConfigLogLevelApplication.main(DynamicConfigLogLevelApplication.java:24) [classes/:na]
Caused by: org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [class org.springframework.cloud.config.environment.Environment] and content type [text/html;charset=UTF-8]
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:123) ~[spring-web-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:998) ~[spring-web-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:981) ~[spring-web-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:741) ~[spring-web-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:674) ~[spring-web-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:583) ~[spring-web-5.2.6.RELEASE.jar:5.2.6.RELEASE]
at org.springframework.cloud.config.client.ConfigServicePropertySourceLocator.getRemoteEnvironment(ConfigServicePropertySourceLocator.java:264) ~[spring-cloud-config-client-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.cloud.config.client.ConfigServicePropertySourceLocator.locate(ConfigServicePropertySourceLocator.java:107) ~[spring-cloud-config-client-2.2.2.RELEASE.jar:2.2.2.RELEASE]
... 9 common frames omitted
2021-02-21 17:41:33.234 WARN 1891 --- [ main] o.s.boot.SpringApplication : Unable to close ApplicationContext
I have defined the URI of the cloud config server in the 'bootstrap.yml' properties file. The bootstrap.yml is:
spring:
cloud:
config:
name: config-test
uri: http://localhost:8081
fail-fast: true
logging:
level:
com.harry.potter.logging_test: trace
I have a "application.properties" file to enable the /refresh feature of the configuration client during runtime:
management.endpoints.web.exposure.include=*
My project's pom.xml is:
<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>
<parent>
<groupId>com.harry.potter</groupId>
<artifactId>cloud-aware-microservices</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>cloud-aware-microservices-config-test</artifactId>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Hoxton.SR4</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
My project's parent pom.xml is:
<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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.0.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.harry.potter</groupId>
<artifactId>cloud-aware-microservices</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<name>cloud-aware-microservices</name>
<description>Cloud Aware Microservice Configuration System</description>
<properties>
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<modules>
<module>cloud-aware-microservices-config</module>
<module>cloud-aware-microservices-config-test</module>
</modules>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
The config server works as expected giving back the configuration contents of a local file being organized as GIT repository when activated with a request to do so (with curl).
What am I doing wrong?
The problem here is that the config client requests the config server without credentials (or with wrong credentials).
In this case Spring's ConfigServicePropertySourceLocator throws the above exception with a rather misleading message:
Could not extract response: no suitable HttpMessageConverter found for response type [class org.springframework.cloud.config.environment.Environment] and content type [text/html;charset=UTF-8]
About credentials and the cloud config server, the Baeldung tutorial "Quick Intro to Spring Cloud" says:
We also need to set a username and a password for the
Basic-Authentication in our application.properties to avoid an
auto-generated password on every application restart.
These credentials are required each time the config client inquires the server for the configuration. I have added the credentials to the 'bootstrap.yml' properties file:
spring:
cloud:
config:
name: config-test
uri: http://localhost:8081
username: harry
password: potter
fail-fast: true
logging:
level:
com.harry.potter.logging_test: trace
That did the trick.
I faced a similar issue when while following this tutorial Quick Intro to Spring Cloud Configuration even though the credentials for the server was correct. I later realized the spring security default settings was causing the error this is because the config server had full securty turned on. I solved it by disabling Cross-Site Request Forgery in the default spring security using the spring configuration:
#Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
#Override
protected void configure(HttpSecurity httpSecurity) throws Exception{
httpSecurity.csrf().disable();
}
}

Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean. Error persists

I am trying to run a spring Boot application on Eclipse Oxygen but I am getting this error. I searched for it and other solutions did not help. This is a simple spring initlizr project, it actually does nothing but I can not run it!If anyone encountered this before please let me know how to solve it. Thank you
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.0.1.RELEASE)
2018-04-12 09:00:15.094 INFO 10652 --- [ main] com.example.demo.DemoApplication : Starting DemoApplication on DESKTOP-URO363O with PID 10652 (C:\Users\Pop\Downloads\ini\demo\target\classes started by Pop in C:\Users\Pop\Downloads\ini\demo)
2018-04-12 09:00:15.097 INFO 10652 --- [ main] com.example.demo.DemoApplication : No active profile set, falling back to default profiles: default
2018-04-12 09:00:15.119 INFO 10652 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#ef9296d: startup date [Thu Apr 12 09:00:15 EEST 2018]; root of context hierarchy
2018-04-12 09:00:15.191 WARN 10652 --- [ 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.
2018-04-12 09:00:15.204 ERROR 10652 --- [ main] o.s.boot.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-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at com.example.demo.DemoApplication.main(DemoApplication.java:10) [classes/:na]
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-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:178) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:152) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
... 8 common frames omitted
My pom.xml look like
<?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.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.1.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>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
EDIT: The main class :
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}

Spring Maven Project - java.lang.IllegalArgumentException: Sources must not be empty

I am trying to start up a Spring Boot application but it is failing to start up. This is my stack trace:
11:27:59.772 [main] DEBUG
org.springframework.boot.devtools.settings.DevToolsSettings - Included
patterns for restart : []
11:27:59.775 [main] DEBUG
org.springframework.boot.devtools.settings.DevToolsSettings - Excluded
patterns for restart : [/spring-boot-starter/target/classes/, /spring-
boot-autoconfigure/target/classes/, /spring-boot-starter-[\w-]+/,
/spring-boot/target/classes/, /spring-boot-actuator/target/classes/,
/spring-boot-devtools/target/classes/]
11:27:59.776 [main] DEBUG
org.springframework.boot.devtools.restart.ChangeableUrls - Matching URLs
for reloading : [file:/C:/Users/Bobi/Documents/workspace-sts-
3.9.2.RELEASE/springproject/target/classes/]
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.0.0.M7)
2018-03-18 11:28:00.308 INFO 5048 --- [ restartedMain]
o.s.boot.SpringApplication : Starting SpringApplication
v2.0.0.M7 on DESKTOP-MFS6ORP with PID 5048
(C:\Users\Bobi\.m2\repository\org\springframework\boot\spring-
boot\2.0.0.M7\spring-boot-2.0.0.M7.jar started by Bobi in
C:\Users\Bobi\Documents\workspace-sts-3.9.2.RELEASE\springproject)
2018-03-18 11:28:00.313 INFO 5048 --- [ restartedMain]
o.s.boot.SpringApplication : No active profile set, falling
back to default profiles: default
2018-03-18 11:28:01.410 ERROR 5048 --- [ restartedMain]
o.s.boot.SpringApplication : Application startup failed
java.lang.IllegalArgumentException: Sources must not be empty
at org.springframework.util.Assert.notEmpty(Assert.java:450) ~[spring-
core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:381) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:325) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1245) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.main(SpringApplication.java:1261) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_151]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_151]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_151]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher
.java:49) [spring-boot-devtools-2.0.0.M7.jar:2.0.0.M7]
This is my main class:
package com.example.a;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class App
{
public static void main( String[] args )
{
SpringApplication.run(App.class, args);
}
}
This 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>com.example</groupId>
<artifactId>a</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>a</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
I am using Spring Tool Suite and I created the project by File->New->Maven Project. I added some dependencies and added the SpringApplication.run(App.class, args); row in the main class and that's it.
I tried other similar suggestions on StackOverflow but nothing worked for me. What do I have to do or change in order to get the application to start up correctly?
I solved the problem. I don't know how I was running the project before, but I just went Right Click->Run As->Spring Boot App and it worked properly.
In Eclipse, when I was running it as a spring boot app, it showed the error, but when I ran it as Java Application from Right-click-> run as -> Java Application, it worked completely fine.

Add an implementation, such as Hibernate Validator, to the classpath error using springboot

I m new to Spring Boot and built my first simple project but have a problem when running the application.
Could you please tell me why it s giving an error , below?
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>io.javabrains.springbootquickstart</groupId>
<artifactId>course-api</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>java Brains Course API</name>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.1.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
</dependency>
</dependencies>
<properties>
<java.version>1.8</java.version>
</properties>
</project>
CourseApiApp.java
package io.javabrains.springbootstarter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class CourseApiApp {
public static void main(String[] args) {
SpringApplication.run(CourseApiApp.class, args);
}
}
This screenshot belongs my example.
Console output below: Application failed to start. "Add an implementation, such as Hibernate Validator, to the classpath"
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.1.RELEASE)
2018-01-09 11:31:47.216 INFO 12224 --- [ main] i.j.springbootstarter.CourseApiApp : Starting CourseApiApp on kafein-kafein with PID 12224 (C:\Users\kafein\Documents\workspace-sts-3.9.2.RELEASE\course-api\target\classes started by kafein in C:\Users\kafein\Documents\workspace-sts-3.9.2.RELEASE\course-api)
2018-01-09 11:31:47.223 INFO 12224 --- [ main] i.j.springbootstarter.CourseApiApp : No active profile set, falling back to default profiles: default
2018-01-09 11:31:47.314 INFO 12224 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext#2a8448fa: startup date [Tue Jan 09 11:31:47 EET 2018]; root of context hierarchy
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (file:/C:/Users/kafein/.m2/repository/org/springframework/spring-core/4.3.6.RELEASE/spring-core-4.3.6.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
2018-01-09 11:31:48.148 WARN 12224 --- [ main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'standardJacksonObjectMapperBuilderCustomizer' defined in class path resource [org/springframework/boot/autoconfigure/jackson/JacksonAutoConfiguration$Jackson2ObjectMapperBuilderCustomizerConfiguration.class]: Unsatisfied dependency expressed through method 'standardJacksonObjectMapperBuilderCustomizer' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'spring.jackson-org.springframework.boot.autoconfigure.jackson.JacksonProperties': Initialization of bean failed; nested exception is javax.validation.ValidationException: Unable to create a Configuration, because no Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath.
2018-01-09 11:31:48.156 INFO 12224 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-01-09 11:31:48.162 ERROR 12224 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
The Bean Validation API is on the classpath but no implementation could be found
Action:
Add an implementation, such as Hibernate Validator, to the classpath
You are missing some libs. Add the following Spring Boot dependency to your pom.xml to solve it. Spring Boot will find out the correct implementations to use in your project.
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
Also, add Hibernate Dependencies:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!-- Hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-ehcache</artifactId>
<exclusions>
<exclusion>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-java8</artifactId>
</dependency>
There should be fixed in the latest spring boot versions per this link: https://github.com/spring-projects/spring-boot/pull/12669 (Allow validation api in the classpath without an implementation). In case of older boot versions, another option to fix this exception is to exclude the vaidation API. Example below when using spring-boot-starter web:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
</exclusion>
</exclusions>
</dependency>
I only needed to add:
compile 'org.springframework.boot:spring-boot-starter-validation'
I am using spring boot version 2.4.4. initially, i used below spring validator dependency that didn't work.
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
But later,I have used below hibernate dependency which worked perfectly in my code
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.2.Final</version>
</dependency>

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