我正在遇到Exception during keep alive check, that means the connection (com.mysql.jdbc.JDBC4Connection@5d8f3404) must be dead. CommunicationsException: Communications link failure.异常，我不确定如何解决它。
我将Spring Cloud Connector与HikariCP一起使用。
我的配置如下：
@Bean
public DataSource dataSource() {
int dbcpMaxActive = 10;
int dbcpMaxWait = 200;
PoolConfig poolConfig = new PoolConfig(dbcpMaxActive, dbcpMaxWait);
ConnectionConfig connectionConfig = new ConnectionConfig("sessionVariables=sql_mode='ANSI';characterEncoding=UTF-8");
DataSourceConfig serviceConfig = new DataSourceConfig(poolConfig, connectionConfig);
return connectionFactory().dataSource("CLEARDB_DATABASE", serviceConfig);
}
这是完整的堆栈跟踪：
WARN com.zaxxer.hikari.pool.HikariPool - Exception during keep alive check, that means the connection (com.mysql.jdbc.JDBC4Connection@5d8f3404) must be dead.
548563684499435525 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
548563684499435532 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 The last packet successfully received from the server was 429,069 milliseconds ago. The last packet sent successfully to the server was 19 milliseconds ago.
548563684499435536 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
548563684499435541 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
548563684499435545 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
548563684499435548 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
548563684499435550 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
548563684499435553 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1036)
548563684499435556 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3427)
548563684499435558 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3327)
548563684499435562 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3814)
548563684503629826 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2435)
548563684503629828 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.mysql.jdbc.ConnectionImpl.pingInternal(ConnectionImpl.java:3971)
548563684503629829 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.mysql.jdbc.ConnectionImpl.ping(ConnectionImpl.java:3951)
548563684503629830 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.mysql.jdbc.StatementImpl.doPingInstead(StatementImpl.java:1509)
548563684503629831 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1395)
548563684503629832 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.zaxxer.hikari.pool.HikariPool.isConnectionAlive(HikariPool.java:451)
548563684503629833 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:182)
548563684503629834 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:108)
548563684503629836 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139)
548563684503629840 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:380)
548563684503629843 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:228)
548563684503629844 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.getConnection(LogicalConnectionImpl.java:171)
548563684503629846 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.hibernate.internal.SessionImpl.connection(SessionImpl.java:450)
548563684503629849 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
548563684507824128 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
548563684507824130 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
548563684507824132 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at java.lang.reflect.Method.invoke(Method.java:497)
548563684507824134 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:202)
548563684507824136 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:187)
548563684507824139 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.orm.jpa.vendor.HibernateJpaDialect$HibernateConnectionHandle.doGetConnection(HibernateJpaDialect.java:385)
548563684507824141 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:153)
548563684507824143 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380)
548563684507824144 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)
548563684507824146 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:463)
548563684507824148 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:276)
548563684507824150 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
548563684507824151 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
548563684507824153 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
548563684512018433 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
548563684512018435 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodIntercceptor.invoke(CrudMethodMetadataPostProcessor.java:122)
548563684512018437 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
548563684512018438 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
548563684512018440 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
548563684512018442 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
548563684512018443 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.sun.proxy.$Proxy143.findAll(Unknown Source)
548563684512018444 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.bignibou.service.advertisement.impl.AdvertisementServiceImpl.regularDayToTimeSlots(AdvertisementServiceImpl.java:94)
548563684512018446 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
548563684512018448 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
548563684512018449 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
548563684512018451 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at java.lang.reflect.Method.invoke(Method.java:497)
548563684512018453 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
548563684516212736 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
548563684516212741 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
548563684516212745 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.cache.interceptor.CacheInterceptor$1.invoke(CacheInterceptor.java:52)
548563684516212748 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.cache.interceptor.CacheAspectSupport.invokeOperation(CacheAspectSupport.java:317)
548563684516212751 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:350)
548563684516212755 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:299)
548563684516212758 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:61)
548563684516212763 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
548563684516212766 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
548563684516212770 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.sun.proxy.$Proxy146.regularDayToTimeSlots(Unknown Source)
548563684520407054 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at com.bignibou.web.controller.utils.UtilsController.regularDayToTimeSlots(UtilsController.java:66)
548563684520407057 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
548563684520407061 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
548563684520407064 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
548563684520407068 2015-06-19T14:43:16 2015-06-19T14:43:16Z 82310644 floating-taiga-1576 54.196.30.228 Local7 Info app/web.1 at java.lang.reflect.Method.invoke(Method.java:497)
548563684637847575
谁能帮忙吗？
最佳答案
阅读HikariCP FAQ，这是第二个问题。