从另一个泊坞窗容器连接到数据库(Connect to database from another d

我跑了码头工人的容器一个是Tomcat和一个phpMyAdmin的。我跑这个命令phpMyAdmin的容器：

docker run -d -p 49160:22 -p 49161:80 -p 49162:3306 --name db phpmyadmin:imported

我可以看到我的浏览器上的端口49161.我用这个命令运行Tomcat容器phpMyAdmin的

 docker run -it -v ~/docker/tomcat/tomcat-users.xml:/usr/local/tomcat/conf/tomcat-users.xml --name tomcat --link db:server -p 8888:8080 tomcat:deployed

每一件事情看起来不错。我可以ping从Tomcat容器的分贝。但是当我尝试连接到它使用Hibernate和我的J2EE应用程序我碰到下面的错误。

10-Jun-2015 19:20:12.293 WARNING [http-nio-8080-exec-15] org.hibernate.cfg.SettingsFactory.buildSettings Could not obtain connection metadata


java.sql.SQLException: Connections could not be acquired from the underlying database!
    at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:690)
    at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
    at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:56)

这是我的hibernate.cfg.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://172.17.0.20:3306/auction</property>
        <property name="hibernate.connection.username">root</property>
       <property name="hibernate.show_sql">true</property>
        <property name="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory</property>
        <property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>


        <mapping class="ie.domain.entity.User"/>
        <mapping class="ie.domain.entity.Auction"/>
        <mapping class="ie.domain.entity.Offer"/>
    </session-factory>
</hibernate-configuration>

我尝试使用名称服务器，而不是IP，也我想，而不是3306端口49162，我得到了同样的错误。

尝试连接：