Question

我有一个Grails（2.2.1）应用程序，我正在尝试配置MySQL复制。这些设置通过“grails run-app”正常工作，但在通过Tomcat运行时失败：

dataSource {
    dbCreate = "update"
    url = "jdbc:mysql:replication://app1-db.cykm5cykm5.us-east-1.rds.amazonaws.com,app1-db-rr1.cykm5cykm5.us-east-1.rds.amazonaws.com/app1_production?useUnicode=true&characterEncoding=UTF-8"
    driverClassName = "com.mysql.jdbc.ReplicationDriver"

    username = "Username"
    password = "Password"

    properties {
        defaultReadOnly = false
        initialSize = 10
        maxActive = 110
        maxIdle = 60
        minIdle = 10
        maxWait = 10000
    }
}

抛出的异常是：

Caused by: java.sql.SQLException: Must specify at least one slave host to connect to for master/slave replication load-balancing functionality
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1075)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:984)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:929)
        at com.mysql.jdbc.NonRegisteringDriver.connectReplicationConnection(NonRegisteringDriver.java:393)
        at com.mysql.jdbc.NonRegisteringReplicationDriver.connect(NonRegisteringReplicationDriver.java:52)
        at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
        at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582)
        at org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556)
        at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545)
        ... 8 more

知道为什么我会看到这个异常，为什么在运行grails dev服务器时它没有出现？

提前致谢。

Answer 1

这证明了定义第二个数据源的问题。正在为两个数据源加载复制驱动程序，即使第二个数据源具有非复制连接字符串。

使用可复制友好的连接字符串配置第二个数据源解决了这个问题。

你如何在Grails中使用MySQL复制驱动程序（在Tomcat上）？

1 个答案: