我们面临着一个奇怪的错误。当我们第一次存储服务器时，我们可以登录等。经过几个小时的不活动，我们无法登录了。我们可以通过重新启动应用程序来解决问题，但是每天至少会发生一次。重新启动应用程序只是一个短期解决方案，我们需要针对此关键问题找到更稳定的解决方案。
我正在使用以下配置：
环境
Hibernate : 5.2.13
JPA : spring-boot-starter-data-jpa (1.5.10)
JDK version : 1.8.0_191
Database : Mysql (version 5.7.25)
JDBC Driver : 5.1.45
Spring Boot : 1.5.10
OS : Ubuntu 16.04.6
光
HikariCP version: 2.7.7
datasource:
type: com.zaxxer.hikari.HikariDataSource
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/<database>?useUnicode=true&characterEncoding=utf8&useSSL=false
username: <username>
password: <secret password>
hikari:
data-source-properties:
cachePrepStmts: true
prepStmtCacheSize: 250
prepStmtCacheSqlLimit: 2048
useServerPrepStmts: true
从应用程序日志中：
AuthenticationServiceException[http-nio-18080-exec-9] UserJWTController: Authentication exception trace: {}
org.springframework.security.authentication.InternalAuthenticationServiceException: Could not open JPA EntityManager for transaction; nested exception is org.hibernate.TransactionException: JDBC begin transaction failed: uthentication.dao.DaoAuthenticationProvider.retrieveUser(DaoAuthenticationProvider.java:126)
at org.springframework.security.authentication.dao.AbstractUserDetailsAuthenticationProvider.authenticate(AbstractUserDetailsAuthenticationProvider.java:144)
at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:174)
at com.example.web.rest.UserJWTController.authorize(UserJWTController.java:48)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
...
...
...
...
...
...
Caused by: org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is org.hibernate.TransactionException: JDBC begin transaction failed:
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:431)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:461)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:277)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
at com.sun.proxy.$Proxy159.loadUserByUsername(Unknown Source)
at org.springframework.security.authentication.dao.DaoAuthenticationProvider.retrieveUser(DaoAuthenticationProvider.java:114)
... 107 common frames omitted
Caused by: org.hibernate.TransactionException: JDBC begin transaction failed:
at org.hibernate.resource.jdbc.internal.AbstractLogicalConnectionImplementor.begin(AbstractLogicalConnectionImplementor.java:73)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.begin(LogicalConnectionManagedImpl.java:263)
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.begin(JdbcResourceLocalTransactionCoordinatorImpl.java:214)
at org.hibernate.engine.transaction.internal.TransactionImpl.begin(TransactionImpl.java:56)
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:189)
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380)
... 115 common frames omitted
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.Util.getInstance(Util.java:408)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:898)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:887)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:861)
at com.mysql.jdbc.ConnectionImpl.throwConnectionClosedException(ConnectionImpl.java:1184)
at com.mysql.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:1179)
at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4770)
at sun.reflect.GeneratedMethodAccessor325.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126)
at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108)
at org.apache.tomcat.jdbc.pool.interceptor.AbstractCreateStatementInterceptor.invoke(AbstractCreateStatementInterceptor.java:79)
at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108)
at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:81)
at com.sun.proxy.$Proxy98.setAutoCommit(Unknown Source)
at org.hibernate.resource.jdbc.internal.AbstractLogicalConnectionImplementor.begin(AbstractLogicalConnectionImplementor.java:67)
... 120 common frames omitted
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 33,215,831 milliseconds ago. The last packet sent successfully to the server was 7 milliseconds ago.
我真的不知道如何在重启后手动触发此问题，因此我们必须等待几个小时才能开始此状态。
似乎我们不是唯一一个遇到此问题的人，但几天后仍未解决，这有点令人沮丧。
我们需要尽快解决这个问题吗？
答案 0 :(得分：0)
我找到了解决我们问题的方法。好像我们在yaml文件中所做的配置无法正常工作，因此我不得不以编程方式配置HikariCP。
我在yaml文件中删除了hikari的配置，然后数据源如下：
datasource:
type: com.zaxxer.hikari.HikariDataSource
数据源配置如下所示：
@Configuration
public class DatasourceConfiguration {
private static final Logger log = LoggerFactory.getLogger(DatasourceConfiguration.class);
private final Environment env;
public DatasourceConfiguration(Environment env) {
this.env = env;
}
@Bean(name="primaryDatasource")
@Primary
@ConfigurationProperties(prefix="spring.datasource")
public DataSource dataSource() {
HikariConfig config = new HikariConfig();
config.setDriverClassName("com.mysql.jdbc.Driver");
config.setPoolName("JPAHikariCP");
config.setAutoCommit(false);
config.setConnectionTestQuery("SELECT 1");
String profile = env.getProperty("spring.profiles.active");
Optional<String> db = Optional.of("database");
Optional<String> username = Optional.of("user");
Optional<String> password = Optional.of("pass");
if("test".equals(profile) || "dev".equals(profile)) {
config.addDataSourceProperty("cachePrepStmts", true);
config.addDataSourceProperty("prepStmtCacheSize", 250);
config.addDataSourceProperty("prepStmtCacheSqlLimit", 2048);
config.addDataSourceProperty("useServerPrepStmts", true);
}
config.setJdbcUrl(String.format("jdbc:mysql://localhost:3306/%s?useUnicode=true&characterEncoding=utf8&useSSL=false", db.get()));
config.setUsername(username.get());
config.setPassword(password.get());
return new HikariDataSource(config);
}
}
现在可以使用了。