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）。应用程序似乎工作正常（RDS中的登录和数据被撤回）。但是，我第一次登录时遇到数据库连接错误。第二次（立即）正常工作。我唯一不同的是尝试使用Java系统属性连接字符串，用户名和密码来外化连接属性：

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")
        }
    }

堆栈追踪：

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

我尝试过的：我将？autoReconnect = true附加到JDBC_CONNECTION_STRING

我已将此添加到conf / spring / resources.groovy：

beans = {       
    dataSource(BasicDataSource) {

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

}

但是，对于每个env配置，正确的位置还是可以/应该将其添加到datasource.groovy文件中？此外，如果我添加URL / driverClassName，用户名和密码现在意味着在多个地方，上面似乎只是有效。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中的所有这些都在一个地方？

Answer 1

这应该有效：

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"
            }
        }
}

Elastic Beanstalk - ＆gt;使用Grails的RDS连接错误

1 个答案: