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Hello, I use OpenJPA as my persistence tool to access database, without using EJB. And if I use it as common java apllication started by main method, it works ok, and when I use it in web apllication in resin there's exception. I also tested it in Tomcat, everything works OK. When program goes to "EntityManagerFactory emf = Persistence.createEntityManagerFactory("infosys");", the EntityManagerFactory is always null. And there are no specail configuration. Version of resin: resin-pro-3.0.28 Version of openjpa: openjpa:-1.2.0 The code of /META-INF/persistence.xml <?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.0"> <persistence-unit name="infosys"
transaction-type="RESOURCE_LOCAL">
<provider>
org.apache.openjpa.persistence.PersistenceProviderImpl </provider> <class>
com.bs.infosys.model.Category </class> <class> com.bs.infosys.model.Article </class> <class> com.bs.infosys.model.Property </class> <properties>
<property name="openjpa.ConnectionURL" value="jdbc:mysql://localhost/infosys?autoReconnect=true&useUnicode=true&characterEncoding=utf-8&mysqlEncoding=utf8" /> <property name="openjpa.ConnectionDriverName"
value="com.mysql.jdbc.Driver" />
<property name="openjpa.ConnectionUserName" value="root" /> <property name="openjpa.ConnectionPassword" value="" /> </properties> </persistence-unit> </persistence>
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