启动seata-server遇到的问题及解决方案

前言

• 自1.0版本后，seata-server解压后的conf文件夹下已经没有db_store.sql和db_undo_log.sql（sql文件可在网上或1.0之前的版本中获取）
• 启动seata-server前准备：
  修改conf目录下的file.conf配置文件，（主要修改自定义事务组名称，事务日志存储模式为db及数据库连接信息）；
  修改conf目录下的registry.conf配置文件，指明注册中心为nacos，及修改nacos连接信息即可
• 先启动Nacos，再使用seata-server中/bin/seata-server.bat文件启动seata-server

问题1：

描述：file.conf配置文件中，数据库url、用户名和密码正确，报错如下：

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.

解决方案：mysql8版本之后，driverClassName由"com.mysql.jdbc.Driver"改为"com.mysql.cj.jdbc.Driver"

问题2：

描述：

java.sql.SQLException: The server time zone value '锟叫癸拷锟斤拷准时锟斤拷' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specifc time zone value if you want to utilize time zone support.
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
        at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:76)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
        at com.mysql.cj.jdbc.ConnectionImpl.<init>(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.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1644)
        at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1710)
        at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:912)
        at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1378)
        at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1374)
        at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:98)
        at io.seata.server.storage.db.store.LogStoreDataBaseDAO.queryTableStructure(LogStoreDataBaseDAO.java:461)
        at io.seata.server.storage.db.store.LogStoreDataBaseDAO.initTransactionNameSize(LogStoreDataBaseDAO.java:445)
        at io.seata.server.storage.db.store.LogStoreDataBaseDAO.<init>(LogStoreDataBaseDAO.java:106)
        at io.seata.server.storage.db.store.DataBaseTransactionStoreManager.<init>(DataBaseTransactionStoreManager.java:96)
        at io.seata.server.storage.db.store.DataBaseTransactionStoreManager.getInstance(DataBaseTransactionStoreManager.java:81)
        at io.seata.server.storage.db.session.DataBaseSessionManager.init(DataBaseSessionManager.java:77)
        at io.seata.common.loader.EnhancedServiceLoader$InnerEnhancedServiceLoader.initInstance(EnhancedServiceLoader.java:564)
        at io.seata.common.loader.EnhancedServiceLoader$InnerEnhancedServiceLoader.createNewExtension(EnhancedServiceLoader.java:395)
        at io.seata.common.loader.EnhancedServiceLoader$InnerEnhancedServiceLoader.getExtensionInstance(EnhancedServiceLoader.java:388)
        at io.seata.common.loader.EnhancedServiceLoader$InnerEnhancedServiceLoader.loadExtension(EnhancedServiceLoader.java:356)
        at io.seata.common.loader.EnhancedServiceLoader$InnerEnhancedServiceLoader.load(EnhancedServiceLoader.java:245)
        at io.seata.common.loader.EnhancedServiceLoader$InnerEnhancedServiceLoader.access$200(EnhancedServiceLoader.java:190)
        at io.seata.common.loader.EnhancedServiceLoader.load(EnhancedServiceLoader.java:82)
        at io.seata.server.session.SessionHolder.init(SessionHolder.java:90)
        at io.seata.server.Server.main(Server.java:84)
Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value '锟叫癸拷锟斤拷准时锟斤拷' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specifc time zone value if you want to utilize time zone support.
        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.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:85)
        at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:132)
        at com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2118)
        at com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2142)
        at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1310)
        at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:967)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
        ... 24 common frames omitted
<==

解决方案：file.conf配置文件中的数据库url后添加serverTimezone

总结

以上两个问题皆错在数据的配置上，修改后如下：