Failed to configure a DataSource: 'url' attribute is not specified spring boot microservice - spring

Question

I am undergone a wired situation,
where I am not able to get the datasource configuration from config server
#SpringBootApplication
#EnableConfigServer
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
Below is my yml which is located on my file system named it as demo-services-development.yml
spring:
datasource:
url: jdbc:mysql://localhost:3306/genesys?useSSL=false
username: root
password: Durairaj90
driver-class-name: com.mysql.jdbc.Driver
jpa:
properties:
hibernate:
dialect: org.hibernate.dialect.MySQL5Dialect
after doing this I tried to access my config server from chrome
http://localhost:8888/demo-services/development
It is returning the datasource configs as json as like below
{"name":"demo-services","profiles":["development"],"label":null,"version":null,"state":null,"propertySources":[{"name":"file:///C:/Users/USHA RAJESH/config-repo/demo-services-development.yml","source":{"spring.datasource.url":"jdbc:mysql://localhost:3306/genesys?useSSL=false","spring.datasource.username":"root","spring.datasource.password":"Durairaj90","spring.datasource.driver-class-name":"com.mysql.jdbc.Driver","spring.jpa.properties.hibernate.dialect":"org.hibernate.dialect.MySQL5Dialect"}}]}
Now I configured this config server to my microservices with below things
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 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>2.1.11.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo-service</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR4</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Below is my application.properties
spring.application.name=demo-services
spring.profiles.active=development
spring.cloud.config.uri=http://localhost:8888
Below is my main class
#SpringBootApplication
public class DemoServiceApplication {
public static void main(String[] args) {
SpringApplication.run(DemoServiceApplication.class, args);
}
}
While Starting the application I am getting below exception
2020-01-08 22:24:05.722 INFO 7204 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-01-08 22:24:05.723 INFO 7204 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 13406 ms
2020-01-08 22:24:06.879 ERROR 7204 --- [ restartedMain] o.s.b.web.embedded.tomcat.TomcatStarter : Error starting Tomcat context. Exception: org.springframework.beans.factory.BeanCreationException. Message: Error creating bean with name 'servletEndpointRegistrar' defined in class path resource [org/springframework/boot/actuate/autoconfigure/endpoint/web/ServletEndpointManagementContextConfiguration$WebMvcServletEndpointManagementContextConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.endpoint.web.ServletEndpointRegistrar]: Factory method 'servletEndpointRegistrar' threw exception; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'healthEndpoint' defined in class path resource [org/springframework/boot/actuate/autoconfigure/health/HealthEndpointConfiguration.class]: Unsatisfied dependency expressed through method 'healthEndpoint' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'healthIndicatorRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/health/HealthIndicatorAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.health.HealthIndicatorRegistry]: Factory method 'healthIndicatorRegistry' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dbHealthIndicator' defined in class path resource [org/springframework/boot/actuate/autoconfigure/jdbc/DataSourceHealthIndicatorAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.health.HealthIndicator]: Factory method 'dbHealthIndicator' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class
2020-01-08 22:24:07.175 INFO 7204 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2020-01-08 22:24:07.254 WARN 7204 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
2020-01-08 22:24:07.311 INFO 7204 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-01-08 22:24:07.322 ERROR 7204 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.
Reason: Failed to determine a suitable driver class
Action:
Consider the following:
If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
Please help me to get rid of this .

Answer 1

When you use spring-cloud-server to retrieve your properties, you need to create a bootstrap.properties|yml file. Indeed, Spring creates a first context, and will create the second once it has been connected to the Cloud server.
So, have a bootstrap.properties file containing:
spring.cloud.config.name=demo-services
spring.cloud.config.profile=development
spring.cloud.config.uri=http://localhost:8888
And make sure your client has the following dependency in your pom.xml file:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-client</artifactId>
</dependency>
You should see some logs at startup like:
2020-01-08 18:21:48.754 INFO 22132 --- [ restartedMain] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://localhost:8888
And it should work ! If you want more information: https://cloud.spring.io/spring-cloud-commons/multi/multi__spring_cloud_context_application_context_services.html
What's happening in your case is that your client are not calling your server to get the properties they need.
P.S : I don't know if it is working with the properties you set in your application.properties, try it and let us know.