我正在使用 Spring Boot 1.3.1 和 MySQL。我在我的日志中得到这个:
The last packet successfully received from the server was 97,025,381 milliseconds ago.
The last packet sent successfully to the server was 97,025,381 milliseconds ago.
is longer than the server configured value of 'wait_timeout'.
You should consider either expiring and/or testing connection validity before use in your application,
increasing the server configured values for client timeouts,
or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
全栈:
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 97,025,381 milliseconds ago. The last packet sent successfully to the server was 97,025,381 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_66]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_66]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_66]
at java.lang.reflect.Constructor.newInstance(Constructor.java:422) ~[na:1.8.0_66]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:404) ~[mysql-connector-java-5.1.38.jar!/:5.1.38]
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:981) ~[mysql-connector-java-5.1.38.jar!/:5.1.38]
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3652) ~[mysql-connector-java-5.1.38.jar!/:5.1.38]
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2460) ~[mysql-connector-java-5.1.38.jar!/:5.1.38]
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2625) ~[mysql-connector-java-5.1.38.jar!/:5.1.38]
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2547) ~[mysql-connector-java-5.1.38.jar!/:5.1.38]
at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4874) ~[mysql-connector-java-5.1.38.jar!/:5.1.38]
at sun.reflect.GeneratedMethodAccessor70.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_66]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_66]
at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126) ~[tomcat-jdbc-8.0.30.jar!/:na]
at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108) ~[tomcat-jdbc-8.0.30.jar!/:na]
at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:81) ~[tomcat-jdbc-8.0.30.jar!/:na]
at com.sun.proxy.$Proxy78.setAutoCommit(Unknown Source) ~[na:na]
at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:72) ~[hibernate-core-4.3.11.Final.jar!/:4.3.11.Final]
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:162) ~[hibernate-core-4.3.11.Final.jar!/:4.3.11.Final]
at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1471) ~[hibernate-core-4.3.11.Final.jar!/:4.3.11.Final]
at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:61) ~[hibernate-entitymanager-4.3.11.Final.jar!/:4.3.11.Final]
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:170) ~[spring-orm-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380) ~[spring-orm-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373) ~[spring-tx-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:427) ~[spring-tx-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:276) ~[spring-tx-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
... 80 common frames omitted
Caused by: java.net.SocketException: Broken pipe
at java.net.SocketOutputStream.socketWrite0(Native Method) ~[na:1.8.0_66]
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109) ~[na:1.8.0_66]
at java.net.SocketOutputStream.write(SocketOutputStream.java:153) ~[na:1.8.0_66]
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) ~[na:1.8.0_66]
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) ~[na:1.8.0_66]
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3634) ~[mysql-connector-java-5.1.38.jar!/:5.1.38]
根据 spring boot docs , tomcat-pool 通常应该自动使用，因为我依赖于 JPA starter:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
有没有办法检查这个？
/beans 端点返回一个这样的 bean:
{
"bean": "dataSource",
"scope": "singleton",
"type": "org.apache.tomcat.jdbc.pool.DataSource",
"resource": "class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceAutoConfiguration$NonEmbeddedConfiguration.class]",
"dependencies": []
}
所以我认为它正在使用tomcat池。
这question讨论 spring.datasource.test-while-idle 和 spring.datasource.validation-interval。您是否需要设置它们以避免出现问题？
最佳答案
spring-boot-starter-jdbc(也由 jpa-data 引用)依赖于 Tomcat 池，因此默认情况下您使用的是 Tomcat 池。您可以通过检查您的 Maven 依赖列表轻松验证这一点。 (您发布的堆栈跟踪也证实了这一点)。
这意味着您应该使用 tomcat-pooling parameters :
- testWhileIdle
- 验证间隔
- 验证查询
关于java - 如何检查Spring Boot使用的是什么数据库池？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34616649/