我的春季启动应用程序总是在早上向我显示此whitelabel错误:无法打开JPA EntityManager进行交易;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关闭连接8小时不活动。但是根据文档spring boot会自动配置池化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'
}
以下是application.properties中的数据库配置:
spring.datasource.url=jdbc:mysql://fakeurl:3306/qa
spring.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数据库:
@Repository
public interface EventRepository extends CrudRepository<EventDetail, Long> {
}
这是针对运行的mysql数据库的结果&#34;显示变量,例如&#39;%timeout%&#39;:
'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'
答案 0 :(得分:14)
检查此答案:Spring Boot JPA - configuring auto reconnect
简而言之,您需要:
spring.datasource.testOnBorrow=true
spring.datasource.validationQuery=SELECT 1
答案 1 :(得分:4)
您还可以看到此link 它告诉您在application.properties文件中包含以下行。
spring.datasource.testWhileIdle = true
spring.datasource.timeBetweenEvictionRunsMillis = 3600000
spring.datasource.validationQuery = SELECT 1
答案 2 :(得分:0)
您可以通过在数据库服务器中设置属性wait_timeout = 31536000来解决此问题。这相当于一年。 如果您的数据库正在AWS环境中运行,请转到参数组 - &gt;创建一个新组 - &gt;设置wait_timeout = 31536000并将新创建的参数组分配给RDS实例。 如果你想在弹簧启动实例中解决这个问题,你可以只修复C3P0设置,但我还没试过。