现在需要把之前的mysql+mybatis+springboot迁移到OB，可以mysql导入数据和结构到OB后直接部署使用吗。mybatis中仍使用mysql驱动吗.mariadb10.3->OB4.2.1
理论上是可以的
2023-12-07 10:35:12.493 ERROR 1 — [io-26080-exec-1] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception duri
ng pool initialization.
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the serve
r.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_181]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_181]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_181
]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_181]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.44.jar!/:5.1.44]
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:989) ~[mysql-connector-java-5.1.44.jar!/:5.1.44
]
at com.mysql.jdbc.MysqlIO.(MysqlIO.java:341) ~[mysql-connector-java-5.1.44.jar!/:5.1.44]
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2189) ~[mysql-connector-java-5.1.44.jar!/:5.1.44]
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2222) ~[mysql-connector-java-5.1.44.jar!/:5.1.4
4]
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2017) ~[mysql-connector-java-5.1.44.jar!/:5.1.44]
at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:779) ~[mysql-connector-java-5.1.44.jar!/:5.1.44]
at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47) ~[mysql-connector-java-5.1.44.jar!/:5.1.44]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_181]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_181]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_181
]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_181]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.44.jar!/:5.1.44]
at com.mysql.jdbc.ConnectionImpl.getInstance$original$tBgLC7RP(ConnectionImpl.java:389) ~[mysql-connector-java-5.1.44.
jar!/:5.1.44]
at com.mysql.jdbc.ConnectionImpl.getInstance$original$tBgLC7RP$accessor$J7REOwPW(ConnectionImpl.java) ~[mysql-connecto
r-java-5.1.44.jar!/:5.1.44]
at com.mysql.jdbc.ConnectionImpl$auxiliary$uPxoxKXs.call(Unknown Source) ~[mysql-connector-java-5.1.44.jar!/:5.1.44]
at org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.StaticMethodsInter.intercept(StaticMethodsInter.jav
a:83) ~[skywalking-agent.jar:8.6.0]
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java) ~[mysql-connector-java-5.1.44.jar!/:5.1.44]
at com.mysql.jdbc.NonRegisteringDriver.connect$original$fQp42xrS(NonRegisteringDriver.java:330) ~[mysql-connector-java
-5.1.44.jar!/:5.1.44]
at com.mysql.jdbc.NonRegisteringDriver.connect$original$fQp42xrS$accessor$rD3PJ6ue(NonRegisteringDriver.java) ~[mysql-
connector-java-5.1.44.jar!/:5.1.44]
各位大侠，上面的使用方式，报HikariPool错误，使用mysql 5.1.44的jdbc驱动，怎么不能用，应该怎么配置，修改
这个日志看是连接配置不对，但是更具体的原因是看不出来的。建议你试一下用一样的配置和相同版本的 hikariCP 直接连接 ob，看看能不能行，如果没有问题的话，再从 spring 应用这边找原因。
“配置和相同版本的 hikariCP 直接连接 ob” 这是什么意思。
目前我们使用的是这些软件版本：
BOOT-INF/lib/spring-boot-starter-jdbc-2.3.2.RELEASE.jar
BOOT-INF/lib/HikariCP-3.4.5.jar
BOOT-INF/lib/spring-jdbc-5.2.8.RELEASE.jar
BOOT-INF/lib/mysql-connector-java-8.0.21.jar
BOOT-INF/lib/mybatis-spring-boot-starter-1.3.2.jar
BOOT-INF/lib/mybatis-spring-boot-autoconfigure-1.3.2.jar
BOOT-INF/lib/mybatis-3.4.6.jar
BOOT-INF/lib/mybatis-spring-1.3.2.jar
报错如下：
[2023-12-14 09:14:38.038] ERROR [main] com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - Exception during pool initialization.
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:456)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197)
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358)
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206)
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477)
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:560)
at com.zaxxer.hikari.pool.HikariPool.(HikariPool.java:115)
at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112)
at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79)
at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:82)
at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:68)
at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:338)
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:84)
at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)
at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:326)
at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)
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.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)
at com.sun.proxy.$Proxy96.selectList(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:230)
at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:139)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:76)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59)
at com.sun.proxy.$Proxy113.queryAll(Unknown Source)
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.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
我的意思是不借助框架，直接用代码连接，比如这样：
try (HikariDataSource dataSource = new HikariDataSource()) {
dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
dataSource.setJdbcUrl("jdbc:mysql://xxx");
dataSource.setUsername("root@test");
dataSource.setPassword("xxx");
try (Connection connection = dataSource.getConnection();
Statement statement = connection.createStatement()) {
ResultSet rs = statement.executeQuery("select version()");
while (rs.next()) {
System.out.println(rs.getString(1));
}
} catch (SQLException e) {
e.printStackTrace();
}
}