Spring Boot and Spring Cloud AWS Data source pool configuration - spring-boot

Question

I have an application on EC2 instance that connect to RDS (MySQL), after 8 hours the DB connection gets closed from MySQL and when the application tries to read/write data I get the below Exception
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed;
nested exception is org.springframework.dao.DataAccessResourceFailureException: could not extract ResultSet;
nested exception is org.hibernate.exception.JDBCConnectionException: could not extract ResultSet] with root cause
java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
also this Exception:
Request processing failed; nested exception is
org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction;
nested exception is javax.persistence.PersistenceException: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionEx
ception: No operations allowed after connection closed.] with root cause
java.net.SocketException: Connection timed out (Write failed)
this happens after 8 hours when the application is running.
my config file (YAML):
management:
security:
enabled: false
spring:
profiles: prod
datasource:
tomcat:
max-active: 20
max-idle: 10
min-idle: 5
initial-size: 5
test-while-idle: true
test-on-borrow: true
test-on-return: true
validation-query: select 2 from dual
validation-interval: 3600
time-between-eviction-runs-millis: 5000
jpa:
database: MYSQL
generate-ddl: false
show-sql: true
properties:
globally_quoted_identifiers: true
hibernate:
ddl-auto: none
cloud:
aws:
stack:
auto: false
region:
static: *****
credentials:
instanceProfile: true
rds:
dev-db:
databaseName: dev-db
username: ******
password: ******
I'm using:
Java 1.8
Spring boot 1.5.4.RELEASE (JAR deployment)
Spring Cloud AWS JDBC and AWS autoconfigure, 1.1.3.RELEASE
My POM is:
<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-thymeleaf</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-cache</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-aws-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-aws-autoconfigure</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Camden.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<repositories>
<repository>
<id>io.spring.repo.maven.release</id>
<url>http://repo.spring.io/release/</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
My Question is:
How can I configure Data source pool in Spring Boot for AWS (Amazon)? I Logged the DataSource configuration once the App is deployed on EC2, and it not configured to with test-while-idle and other configurations, here is the logs from EC2:
Data source Class Impl: class org.apache.tomcat.jdbc.pool.DataSource
TimeBetweenEvictionRunsMillis: 5000
ValidationInterval: 3000
isTestOnBorrow: false
isTestOnBorrow: false
isTestOnBorrow: false
I checked this Page but cannot find a way to configure the pool from properties file (yaml in my case)...

Answer 1

I found below workaround, but it would be better to support it through same spring AWS-JDBC auto-config properties.. I added the below (from spring cloud aws)
#Configuration
#EnableRdsInstance(dbInstanceIdentifier = "test",password = "secret")
public class ApplicationConfiguration {
#Bean
public RdsInstanceConfigurer instanceConfigurer() {
return new RdsInstanceConfigurer() {
#Override
public DataSourceFactory getDataSourceFactory() {
TomcatJdbcDataSourceFactory dataSourceFactory = new TomcatJdbcDataSourceFactory();
dataSourceFactory.setInitialSize(10);
dataSourceFactory.setValidationQuery("SELECT 1 FROM DUAL");
dataSourceFactory.setValidationInterval(10000);
dataSourceFactory.setTimeBetweenEvictionRunsMillis(20000);
return dataSourceFactory;
}
};
}
}