一夜之间失去连接(Spring Boot + MySQL)
我的Spring Boot" title="Spring Boot">Spring Boot应用程序总是在早上向我显示此whitelabel错误:无法打开JPA
EntityManager进行事务;嵌套异常是javax.persistence.PersistenceException:org.hibernate.TransactionException:JDBC开始事务失败:
我在网上搜索,我认为可能是mysql关闭了8个小时的非活动连接。但是,根据该文档,spring boot将自动配置pooling
apache数据源。http://docs.spring.io/spring-boot/docs/current/reference/html/boot-
features-sql.html
我不确定如何配置应用程序代码或数据库。
这是我正在使用的build.gradle:
buildscript { ext {
springBootVersion = '1.2.3.RELEASE'
}
repositories {
maven { url "http://repo.spring.io/libs-snapshot" }
mavenLocal()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:1.2.3.RELEASE")
}
}
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'spring-boot'
apply plugin: 'war'
apply plugin: 'application'
repositories {
mavenCentral()
maven { url "http://repo.spring.io/libs-snapshot" }
maven { url "http://maven.springframework.org/milestone" }
}
// Seems tomcat 8 doesn't work with paypal
configurations.all {
resolutionStrategy {
eachDependency {
if (it.requested.group == 'org.apache.tomcat.embed') {
it.useVersion '7.0.59'
}
}
}
}
dependencies {
compile("org.springframework.boot:spring-boot-starter-web:${springBootVersion}")
compile("org.springframework.boot:spring-boot-starter-tomcat:${springBootVersion}")
compile("org.springframework.boot:spring-boot-starter-actuator")
compile("org.springframework.boot:spring-boot-starter-mail:${springBootVersion}")
compile("org.springframework.boot:spring-boot-starter-aop:${springBootVersion}")
compile("org.springframework.boot:spring-boot-starter-test:${springBootVersion}")
compile("org.springframework.boot:spring-boot-starter-security:${springBootVersion}")
compile("org.springframework.boot:spring-boot-starter-data-jpa:${springBootVersion}")
compile("org.springframework.data:spring-data-rest-webmvc")
compile("javax.servlet:jstl:1.2")
compile("org.apache.logging.log4j:log4j-api:2.3")
compile("org.apache.logging.log4j:log4j-core:2.3")
compile("com.paypal.sdk:rest-api-sdk:1.2.1")
compile("com.opencsv:opencsv:3.4")
compile("mysql:mysql-connector-java:5.1.35")
compile("com.google.guava:guava:17.0")
compile("org.apache.httpcomponents:httpclient:4.3.4")
compile("com.squareup.retrofit:retrofit:1.6.0")
compile("commons-io:commons-io:2.4")
compile("org.apache.commons:commons-lang3:3.4")
compile("com.amazonaws:aws-java-sdk:1.9.34")
providedCompile("org.apache.tomcat.embed:tomcat-embed-jasper:8.0.22")
testCompile("junit:junit")
}
sourceCompatibility = 1.7
targetCompatibility = 1.7
war {
baseName = 'gs-convert-jar-to-war'
version = '0.1.0'
}
task wrapper(type: Wrapper) {
gradleVersion = '2.3'
}
这是application.properties中的数据库配置:
spring.datasource.url=jdbc:mysql://fakeurl:3306/qaspring.datasource.username=username
spring.datasource.password=password
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.jpa.database-platform=org.hibernate.dialect.MySQLDialect
#
# hibernate
#
spring.jpa.hibernate.ddl-auto=update
对于数据源,我使用spring数据的存储库:
@Repositorypublic interface EventRepository extends CrudRepository<EventDetail, Long> {
}
这是针对运行“显示变量,如’%timeout%’的mysql数据库的结果:
'connect_timeout','10''delayed_insert_timeout','300'
'innodb_flush_log_at_timeout','1'
'innodb_lock_wait_timeout','50'
'innodb_rollback_on_timeout','OFF'
'interactive_timeout','28800'
'lock_wait_timeout','31536000'
'net_read_timeout','30'
'net_write_timeout','60'
'rpl_stop_slave_timeout','31536000'
'slave_net_timeout','3600'
'wait_timeout','28800'
回答:
检查这个答案:Spring Boot JPA-配置自动重新连接
简而言之,您需要:
spring.datasource.testOnBorrow=truespring.datasource.validationQuery=SELECT 1
以上是 一夜之间失去连接(Spring Boot + MySQL) 的全部内容, 来源链接: utcz.com/qa/416506.html