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流口水流持久性-找不到命名查询：ProcessInstancesWaitingForEvent

分类：编程问答

如何解决流口水流持久性-找不到命名查询：ProcessInstancesWaitingForEvent

| 我在Drools Flow Persistence（MysqL）上遇到问题，出现以下异常： 
2011-04-15 14:38:27,244 INFO  [STDOUT] (http-0.0.0.0-8000-5) Hibernate: insert into ProcessInstanceInfo (externalVariables,lastModificationDate,lastReadDate,processId,processInstanceByteArray,startDate,state,OPTLOCK) values (?,?,?)

2011-04-15 14:38:27,244 INFO  [STDOUT] (http-0.0.0.0-8000-5) Hello World

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5) java.lang.RuntimeException: Could not commit session

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:292)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.command.impl.CommandBasedStatefulKNowledgeSession.startProcess(CommandBasedStatefulKNowledgeSession.java:193)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.command.impl.CommandBasedStatefulKNowledgeSession.startProcess(CommandBasedStatefulKNowledgeSession.java:184)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at com.servlet.Servlet.doGet(Servlet.java:101)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:324)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:181)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.event(CatalinaContext.java:285)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.invoke(CatalinaContext.java:261)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:88)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:100)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.jboss.web.tomcat.service.request.ActiveRequestresponsecacheValve.invoke(ActiveRequestresponsecacheValve.java:53)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:654)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at java.lang.Thread.run(Thread.java:619)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5) Caused by: java.lang.IllegalArgumentException: Named query not found: ProcessInstancesWaitingForEvent

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.hibernate.ejb.AbstractEntityManagerImpl.createNamedQuery(AbstractEntityManagerImpl.java:455)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.persistence.processinstance.JPASignalManager.getProcessInstancesForEvent(JPASignalManager.java:32)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.persistence.processinstance.JPASignalManager.signalEvent(JPASignalManager.java:21)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.setState(WorkflowProcessInstanceImpl.java:270)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.nodeInstanceCompleted(WorkflowProcessInstanceImpl.java:421)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.node.EndNodeInstance.internalTrigger(EndNodeInstance.java:62)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:117)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:178)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:144)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.node.ActionNodeInstance.triggerCompleted(ActionNodeInstance.java:62)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:58)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:49)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:41)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.ruleflow.instance.RuleFlowProcessInstance.internalStart(RuleFlowProcessInstance.java:32)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.process.instance.impl.ProcessInstanceImpl.start(ProcessInstanceImpl.java:192)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.start(WorkflowProcessInstanceImpl.java:309)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1644)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.impl.StatefulKNowledgeSessionImpl.startProcess(StatefulKNowledgeSessionImpl.java:306)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.command.runtime.process.StartProcessCommand.execute(StartProcessCommand.java:99)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.command.runtime.process.StartProcessCommand.execute(StartProcessCommand.java:38)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    at org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:279)

2011-04-15 14:38:27,244 ERROR [STDERR] (http-0.0.0.0-8000-5)    ... 24 more
我到处都读到必须将orm.xml文件放置在meta-inf文件夹中（我已经完成），其中包含以下内容： 
<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<entity-mappings xmlns=\"http://java.sun.com/xml/ns/persistence/orm\"
               xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"
               xsi:schemaLocation=\"http://java.sun.com/xml/ns/persistence/orm orm_1_0.xsd\"
               version=\"1.0\">
      <named-query name=\"ProcessInstancesWaitingForEvent\">
          <query>
select
    processInstanceInfo.processInstanceId
from
    ProcessInstanceInfo processInstanceInfo
where
    :type in elements(processInstanceInfo.eventTypes)
          </query>
      </named-query>
</entity-mappings>
但这仍然会引发异常，您可以在我昨天问的上一个问题中查看我的配置文件，这里 这让我发疯，任何帮助或想法都受到赞赏。     

解决方法

部署到应用程序服务器时，默认情况下，它不一定总是能够在META-INF目录中拾取orm.xml。最好的解决方法是通常创建一个自定义orm文件（在本例中为META-INF目录中的JBPMorm.xml），然后将映射直接添加到persistence.xml中： 
<persistence-unit name=\"org.jbpm.persistence.jpa\" transaction-type=\"JTA\">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:jdbc/testDS1</jta-data-source>        
    <mapping-file>META-INF/JBPMorm.xml</mapping-file>
    ...
克里斯     

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