Elastic Beanstalk - >使用Grails的RDS连接错误

Question

我正在将Grails应用程序部署到Amazon Web Services Elastic Beanstalk并利用RDS。我正在使用Grails，Spring-Security（RDS表）。该应用程序似乎工作正常（RDS中的登录和数据被撤回）。但是，我第一次登录时，我得到一个数据库连接错误。第二次（立即）工作正常。我略有不同做的唯一的事情是试图使用Java系统特性的连接字符串，用户名和密码来外部连接属性：

production { 
      dataSource { 
      url = System.getProperty("JDBC_CONNECTION_STRING") 
      driverClassName = "com.mysql.jdbc.Driver" 
      dbCreate = "validate" 
      dialect = org.hibernate.dialect.MySQL5InnoDBDialect 
      username = System.getProperty("PARAM1") 
      password = System.getProperty("PARAM2") 
     } 
    } 

堆栈跟踪：

Caused by: org.hibernate.TransactionException: JDBC begin failed: 
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:96) 
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1353) 
at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:555) 
... 80 more 
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 41,541,715 milliseconds ago. The last packet sent successfully to the server was 41,541,716 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem. 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:532) 
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:407) 
    at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1116) 
    at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3358) 
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1970) 
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2150) 
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2620) 
    at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:5022) 
    at org.apache.commons.dbcp.DelegatingConnection.setAutoCommit(DelegatingConnection.java:371) 
    at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setAutoCommit(PoolingDataSource.java:328) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:616) 
    at org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy$TransactionAwareInvocationHandler.invoke(TransactionAwareDataSourceProxy.java:239) 
    at $Proxy11.setAutoCommit(Unknown Source) 
    at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:91) 
    ... 82 more 
Caused by: java.net.SocketException: Connection timed out 
    at java.net.SocketOutputStream.socketWrite0(Native Method) 
    at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109) 
    at java.net.SocketOutputStream.write(SocketOutputStream.java:153) 
    at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) 
    at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) 
    at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3339) 
    ... 95 more 

我”什么已经试过： 我追加autoReconnect的= true添加到JDBC_CONNECTION_STRING

我已经添加到了的conf /春/ resources.groovy：

beans = {  
    dataSource(BasicDataSource) { 

     minEvictableIdleTimeMillis=1800000 
     timeBetweenEvictionRunsMillis=1800000 
     numTestsPerEvictionRun=3 
     testOnBorrow=true 
     testWhileIdle=true 
     testOnReturn=true 
     validationQuery="SELECT 1" 
    } 

}

不过是在正确的地方，也可以/应添加到每个ENV配置DataSource.groovy文件？此外，如果我添加URL/driverClassName，用户名和密码，现在意味着它在多个位置，上述内容似乎是有效的。我还没有确认它是否解决了这个问题，但是有没有办法让每个环境都在一个地方？

Answer 1

这应该工作：

production { 
     dataSource { 
      url = System.getProperty("JDBC_CONNECTION_STRING") 
      driverClassName = "com.mysql.jdbc.Driver" 
      dbCreate = "validate" 
      dialect = org.hibernate.dialect.MySQL5InnoDBDialect 
      username = System.getProperty("PARAM1") 
      password = System.getProperty("PARAM2") 

      //configure DBCP 
      properties { 
       minEvictableIdleTimeMillis=1800000 
       timeBetweenEvictionRunsMillis=1800000 
       numTestsPerEvictionRun=3 
       testOnBorrow=true 
       testWhileIdle=true 
       testOnReturn=true 

       validationQuery="SELECT 1" 
      } 
     } 
}