一个MySql实例自动创建多个Activiti数据库问题

一次使用SSH和Activiti6开发的项目中，在服务器启动的时候就报错：

org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.sql.SQLSyntaxErrorException: Table 'activiti.act_ge_property' doesn't exist
### The error may exist in org/activiti/db/mapping/entity/Property.xml
### The error may involve org.activiti.engine.impl.persistence.entity.PropertyEntityImpl.selectProperty-Inline
### The error occurred while setting parameters
### SQL: select * from ACT_GE_PROPERTY where NAME_ = ?

### Cause: java.sql.SQLSyntaxErrorException: Table 'activiti.act_ge_property' doesn't exist

查找表不存在？Activiti没有自动建表？

可配置文件确实将databaseSchemaUpdate属性设置为了true，这意味着activiti会执行无表创建，有表更新的策略

        <bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
    <property name="dataSource" ref="pooledDataSource" />
   <property name="transactionManager" ref="transactionManager" />
   <property name="databaseSchema" value="roomRent" />
   <property name="databaseSchemaUpdate" value="true" />
   <property name="asyncExecutorActivate" value="false" />

</bean>

但执行显示并没有起效。网上也没有靠谱的结果。。

只能自己查看源码。databaseSche