[castor-dev] Key Generator Failure

[Arun Sudhakaran]

Hi all,   Im using JBoss 3.0 with Castor 0.9.3.21.The problem is that when i try to perform a write operation on the database from 4 different processes it throws the following exception :   2002-10-30 15:44:43,544 ERROR [STDERR] org.exolab.castor.jdo.LockNotGrantedException: Lock is already existed for the new oid. 2002-10-30 15:44:43,564 ERROR [STDERR]  at org.exolab.castor.persist.LockEngine$TypeInfo.rename(Unknown Source) 2002-10-30 15:44:43,564 ERROR [STDERR]  at org.exolab.castor.persist.LockEngine$TypeInfo.access$400(Unknown Source) 2002-10-30 15:44:43,564 ERROR [STDERR]  at org.exolab.castor.persist.LockEngine.create(Unknown Source) 2002-10-30 15:44:43,564 ERROR [STDERR]  at org.exolab.castor.persist.TransactionContext.prepare(Unknown Source) 2002-10-30 15:44:43,564 ERROR [STDERR]  at org.exolab.castor.jdo.engine.DatabaseImpl.beforeCompletion(DatabaseImpl.java:561) 2002-10-30 15:44:43,564 ERROR [STDERR]  at org.jboss.tm.TxCapsule.doBeforeCompletion(TxCapsule.java:1331) 2002-10-30 15:44:43,564 ERROR [STDERR]  at org.jboss.tm.TxCapsule.commit(TxCapsule.java:328) 2002-10-30 15:44:43,564 ERROR [STDERR]  at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:74) 2002-10-30 15:44:43,564 ERROR [STDERR]  at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:190) 2002-10-30 15:44:43,564 ERROR [STDERR]  at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:61) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:129) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:166) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.ejb.StatelessSessionContainer.invoke(StatelessSessionContainer.java:313) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.ejb.Container.invoke(Container.java:705) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:491) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:73) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:76) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:111) 2002-10-30 15:44:43,574 ERROR [STDERR]  at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76) 2002-10-30 15:44:43,574 ERROR [STDERR]  at $Proxy44.submitAnswer(Unknown Source) 2002-10-30 15:44:43,574 ERROR [STDERR]  at com.softex.mobilequiz.server.servlet.action.MQSGetResults.executeAction(MQSGetResults.java:176) 2002-10-30 15:44:43,584 ERROR [STDERR]  at com.softex.mobilequiz.server.servlet.action.MQSEntryPoint.execute(MQSEntryPoint.java:159) 2002-10-30 15:44:43,584 ERROR [STDERR]  at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:453) 2002-10-30 15:44:43,584 ERROR [STDERR]  at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:266) 2002-10-30 15:44:43,584 ERROR [STDERR]  at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1292) 2002-10-30 15:44:43,584 ERROR [STDERR]  at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510) 2002-10-30 15:44:43,584 ERROR [STDERR]  at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) 2002-10-30 15:44:43,584 ERROR [STDERR]  at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180) 2002-10-30 15:44:43,594 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) 2002-10-30 15:44:43,604 ERROR [STDERR]  at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170) 2002-10-30 15:44:43,604 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) 2002-10-30 15:44:43,604 ERROR [STDERR]  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170) 2002-10-30 15:44:43,704 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) 2002-10-30 15:44:43,704 ERROR [STDERR]  at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468) 2002-10-30 15:44:43,704 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564) 2002-10-30 15:44:43,704 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) 2002-10-30 15:44:43,704 ERROR [STDERR]  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) 2002-10-30 15:44:43,704 ERROR [STDERR]  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174) 2002-10-30 15:44:43,714 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566) 2002-10-30 15:44:43,714 ERROR [STDERR]  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472) 2002-10-30 15:44:43,714 ERROR [STDERR]  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) 2002-10-30 15:44:43,714 ERROR [STDERR]  at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:429) 2002-10-30 15:44:43,714 ERROR [STDERR]  at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:495) 2002-10-30 15:44:43,714 ERROR [STDERR]  at java.lang.Thread.run(Thread.java:536) 2002-10-30 15:44:43,714 ERROR [org.jboss.jdo.castor.CastorJDOImpl] Exception org.exolab.castor.jdo.PersistenceException: Nested error: Key Generator Failure. Duplicated Identity is generated!  at org.exolab.castor.persist.LockEngine.create(Unknown Source)  at org.exolab.castor.persist.TransactionContext.prepare(Unknown Source)  at org.exolab.castor.jdo.engine.DatabaseImpl.beforeCompletion(DatabaseImpl.java:561)  at org.jboss.tm.TxCapsule.doBeforeCompletion(TxCapsule.java:1331)  at org.jboss.tm.TxCapsule.commit(TxCapsule.java:328)  at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:74)  at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:190)  at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:61)  at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:129)  at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:166)  at org.jboss.ejb.StatelessSessionContainer.invoke(StatelessSessionContainer.java:313)  at org.jboss.ejb.Container.invoke(Container.java:705)  at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:491)  at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98)  at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102)  at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:73)  at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:76)  at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:111)  at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76)  at $Proxy44.submitAnswer(Unknown Source)  at com.softex.mobilequiz.server.servlet.action.MQSGetResults.executeAction(MQSGetResults.java:176)  at com.softex.mobilequiz.server.servlet.action.MQSEntryPoint.execute(MQSEntryPoint.java:159)  at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:453)  at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:266)  at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1292)  at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)  at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)  at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)  at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)  at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)  at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)  at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:429)  at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:495)  at java.lang.Thread.run(Thread.java:536) My guess is that since a Key Generator Failure occured,the lock previouly acquired on that object does not get released and it thorws the LockNotGrantedException when another process tries to lock it. This would lead to the question as to why the Key Generator Failure occured in the first place.   I'd already seen 2 or 3 postings on the same matter but there were no replies to that , and i would like to have an  answer to this solution at the earliest.   Thanking you, Arun Sudhakaran, Softex Computer Consultants. E-Mail : [EMAIL PROTECTED]