Activiti的使用JPA：關係 「act_hi_procinst」 已經存在

Question

我有什麼：

我試圖Activiti的配置使用JPA事務管理器。 參見下面的代碼部分 我在processEngineConfiguration bean和jpa-persistance.xml中定義數據庫配置。

什麼問題：

我已經得到org.postgresql.util.PSQLException：ERROR：關係act_hi_procinst已經存在例外

問：

如何解決問題？

代碼：

的applicationContext.xml

<bean id="activitiDataSource" class="org.springframework.jdbc.datasource.SimpleDriverDataSource"> 
     <property name="driverClass" value="org.postgresql.Driver" /> 
     <property name="url" value="jdbc:postgresql://localhost:5432/activiti-transaction-demo" /> 
     <property name="username" value="postgres" /> 
     <property name="password" value="Volodumur6894834" /> 
    </bean> 

    <bean id="persistenceUnitManager" class="org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager"> 
     <property name="persistenceXmlLocation"> 
      <value>classpath:jpa-persistence.xml</value> 
     </property> 
    </bean> 

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
     <property name="persistenceUnitManager" ref="persistenceUnitManager" /> 
    </bean> 

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> 
     <property name="entityManagerFactory" ref="entityManagerFactory" /> 
    </bean> 

    <bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration"> 

     <property name="databaseType" value="postgres" /> 
     <property name="dataSource" ref="activitiDataSource" /> 
     <property name="transactionManager" ref="transactionManager" /> 
     <property name="databaseSchemaUpdate" value="create" /> 
     <property name="jpaEntityManagerFactory" ref="entityManagerFactory" /> 
     <property name="jpaHandleTransaction" value="true" /> 
     <property name="jpaCloseEntityManager" value="true" /> 
     <property name="deploymentResources" value="classpath*:process/simplest_process.bpmn20.xml" /> 
     <property name="jobExecutorActivate" value="false" /> 
     <property name="history" value="full"/> 
    </bean> 

    <bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean"> 
     <property name="processEngineConfiguration" ref="processEngineConfiguration" /> 
    </bean> 

JPA-persistance.xml：

<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" version="2.0"> 
    <persistence-unit name="Client" transaction-type="RESOURCE_LOCAL"> 
     <provider>org.hibernate.ejb.HibernatePersistence</provider> 
     <class>name.krestjaninoff.activiti.hello.db.Client</class> 
     <exclude-unlisted-classes>true</exclude-unlisted-classes> 
     <properties> 
      <property name="hibernate.dialect" value="org.hibernate.dialect.ProgressDialect" /> 
      <property name="hibernate.hbm2ddl.auto" value="create" /> 
      <property name="hibernate.connection.driver_class" value="org.postgresql.Driver" /> 
      <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/activiti-transaction-demo" /> 
      <property name="hibernate.connection.username" value="postgres" /> 
      <property name="hibernate.connection.password" value="Volodumur6894834" /> 
      <property name="hibernate.show_sql" value="true"/> 
     </properties> 
    </persistence-unit> 
</persistence> 

Answer 1

你已經在兩個地方定義數據庫的創建：

<property name="databaseSchemaUpdate" value="create" /> 

和

<property name="hibernate.hbm2ddl.auto" value="create" /> 

也許嘗試刪除這個屬性格式的一個或一組databaseSchemaUpdate「更新」。