1 Reply Latest reply on Mar 18, 2003 4:32 PM by gjritter

Finders throw NullPointerException

gjritter Mar 17, 2003 10:00 PM

I'm developing an application using entity beans, and I'm trying to make use of xdoclet's support for JBoss. I've developed several beans that are working correctly when deployed in JBoss 3.0.6 on my Windows development environment; however, when I deploy them in our build server that is also running JBoss 3.0.6 on a Linux box, I get NullPointerExceptions when calling finder methods. Here are some examples:

NPE in findByPrincipalId:

10:15:57:464 [PoolThread-3] ERROR org.jboss.ejb.plugins.LogInterceptor UserServicesBean UserBean - TransactionRolledbackLocalException, causedBy:
java.lang.NullPointerException
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.createBeanClassInstance(JDBCStoreManager.java:513)
at org.jboss.ejb.plugins.CMPPersistenceManager.createBeanClassInstance(CMPPersistenceManager.java:165)
at org.jboss.ejb.EntityContainer.createBeanClassInstance(EntityContainer.java:294)
at org.jboss.ejb.plugins.AbstractInstancePool.get(AbstractInstancePool.java:184)
at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceInterceptor.java:78)
at org.jboss.ejb.plugins.EntityLockInterceptor.invokeHome(EntityLockInterceptor.java:79)
at org.jboss.ejb.plugins.EntityCreationInterceptor.invokeHome(EntityCreationInterceptor.java:44)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:111)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:228)
at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:62)
at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:105)
at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:129)
at org.jboss.ejb.EntityContainer.invokeHome(EntityContainer.java:487)
at org.jboss.ejb.plugins.local.BaseLocalContainerInvoker.invokeHome(BaseLocalContainerInvoker.java:230)
at org.jboss.ejb.plugins.local.LocalHomeProxy.invoke(LocalHomeProxy.java:110)
at $Proxy310.findByPrincipalId(Unknown Source)
at org.leaguemaker.ejb.session.UserServicesBean.registerUser(Unknown Source)
at java.lang.reflect.Method.invoke(Native Method)
at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:660)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186)
at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:77)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:107)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:228)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:92)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
at org.jboss.ejb.StatelessSessionContainer.invoke(StatelessSessionContainer.java:313)
at org.jboss.ejb.plugins.local.BaseLocalContainerInvoker.invoke(BaseLocalContainerInvoker.java:301)
at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:81)
at $Proxy321.registerUser(Unknown Source)
at org.leaguemaker.web.delegate.UserServicesDelegate.registerUser(Unknown Source)
at org.leaguemaker.web.action.RegistrationAction.execute(Unknown Source)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:480)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1420)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:520)
at servletunit.struts.CactusStrutsTestCase.actionPerform(CactusStrutsTestCase.java:471)
at org.leaguemaker.web.action.RegistrationActionTest.testSuccessfulRegistration(Unknown Source)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.cactus.AbstractTestCase.runServerTest(AbstractTestCase.java:332)
at org.apache.cactus.AbstractTestCase.runBareServerTest(AbstractTestCase.java:235)
at org.apache.cactus.server.AbstractWebTestCaller.doTest(AbstractWebTestCaller.java:149)
at org.apache.cactus.server.AbstractWebTestController.dispatch87_handleRequest(AbstractWebTestController.java;org/apache/cactus/util/log/LogAspect.aj(1k):125)
at org.apache.cactus.server.AbstractWebTestController.around87_handleRequest(AbstractWebTestController.java;org/apache/cactus/util/log/LogAspect.aj(1k):1156)
at org.apache.cactus.server.AbstractWebTestController.handleRequest(AbstractWebTestController.java;org/apache/cactus/util/log/LogAspect.aj(1k):101)
at org.apache.cactus.server.ServletTestRedirector.dispatch113_doPost(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):123)
at org.apache.cactus.server.ServletTestRedirector.around113_doPost(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):1156)
at org.apache.cactus.server.ServletTestRedirector.doPost(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):109)
at org.apache.cactus.server.ServletTestRedirector.dispatch112_doGet(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):96)
at org.apache.cactus.server.ServletTestRedirector.around112_doGet(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):1156)
at org.apache.cactus.server.ServletTestRedirector.doGet(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):92)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:360)
at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:280)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:553)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1717)
at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:549)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1667)
at org.mortbay.http.HttpServer.service(HttpServer.java:862)
at org.jboss.jetty.Jetty.service(Jetty.java:497)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:759)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:923)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:776)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:202)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:455)

NPE in findAll:

10:15:57:611 [PoolThread-3] ERROR org.jboss.ejb.plugins.LogInterceptor UserBean - RuntimeException:
java.lang.NullPointerException
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.createBeanClassInstance(JDBCStoreManager.java:513)
at org.jboss.ejb.plugins.CMPPersistenceManager.createBeanClassInstance(CMPPersistenceManager.java:165)
at org.jboss.ejb.EntityContainer.createBeanClassInstance(EntityContainer.java:294)
at org.jboss.ejb.plugins.AbstractInstancePool.get(AbstractInstancePool.java:184)
at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceInterceptor.java:78)
at org.jboss.ejb.plugins.EntityLockInterceptor.invokeHome(EntityLockInterceptor.java:79)
at org.jboss.ejb.plugins.EntityCreationInterceptor.invokeHome(EntityCreationInterceptor.java:44)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:111)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:228)
at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:62)
at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:105)
at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:129)
at org.jboss.ejb.EntityContainer.invokeHome(EntityContainer.java:487)
at org.jboss.ejb.plugins.local.BaseLocalContainerInvoker.invokeHome(BaseLocalContainerInvoker.java:230)
at org.jboss.ejb.plugins.local.LocalHomeProxy.invoke(LocalHomeProxy.java:110)
at $Proxy310.findAll(Unknown Source)
at org.leaguemaker.web.action.RegistrationActionTest.tearDown(Unknown Source)
at org.apache.cactus.AbstractTestCase.runBareServerTest(AbstractTestCase.java:237)
at org.apache.cactus.server.AbstractWebTestCaller.doTest(AbstractWebTestCaller.java:149)
at org.apache.cactus.server.AbstractWebTestController.dispatch87_handleRequest(AbstractWebTestController.java;org/apache/cactus/util/log/LogAspect.aj(1k):125)
at org.apache.cactus.server.AbstractWebTestController.around87_handleRequest(AbstractWebTestController.java;org/apache/cactus/util/log/LogAspect.aj(1k):1156)
at org.apache.cactus.server.AbstractWebTestController.handleRequest(AbstractWebTestController.java;org/apache/cactus/util/log/LogAspect.aj(1k):101)
at org.apache.cactus.server.ServletTestRedirector.dispatch113_doPost(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):123)
at org.apache.cactus.server.ServletTestRedirector.around113_doPost(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):1156)
at org.apache.cactus.server.ServletTestRedirector.doPost(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):109)
at org.apache.cactus.server.ServletTestRedirector.dispatch112_doGet(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):96)
at org.apache.cactus.server.ServletTestRedirector.around112_doGet(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):1156)
at org.apache.cactus.server.ServletTestRedirector.doGet(ServletTestRedirector.java;org/apache/cactus/util/log/LogAspect.aj(1k):92)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:360)
at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:280)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:553)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1717)
at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:549)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1667)
at org.mortbay.http.HttpServer.service(HttpServer.java:862)
at org.jboss.jetty.Jetty.service(Jetty.java:497)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:759)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:923)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:776)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:202)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:455)

Here are the relevant xdoclet tags from UserBean.java; I haven't included the sources generated by xdoclet, but I would be happy to post those as well if it would be helpful.

UserBean.java:

...

/**
* @ejb.bean
* name="UserBean"
* display-name="UserBean"
* type="CMP"
* view-type="both"
* primkey-field="id"
* @ejb.finder
* signature="java.util.Collection findAll()"
* @ejb.finder
* signature="org.leaguemaker.ejb.entity.UserBeanRemote findByPrincipalId(java.lang.String principalId)"
* query="SELECT OBJECT(user) FROM UserBean AS user WHERE user.principalId = ?1"
* method-intf="Home"
* @ejb.finder
* signature="org.leaguemaker.ejb.entity.UserBeanLocal findByPrincipalId(java.lang.String principalId)"
* query="SELECT OBJECT(user) FROM UserBean AS user WHERE user.principalId = ?1"
* method-intf="Local"
* @ejb.home
* @ejb.interface
* @ejb.persistence
* table-name="UserBean"
* @ejb.pk
* class="java.lang.String"
* generate="false"
* @ejb.ejb-ref
* ejb-name="UserBean"
* view-type="local"
*/
...

Thanks,

-Greg-

1. Re: Finders throw NullPointerException

gjritter Mar 18, 2003 4:32 PM (in response to gjritter)

I restarted JBoss on the build server, and now everything seems to be working as expected. I've redeployed through several build/test cycles without any problems. I still don't know what was causing this problem, but at least it's working now. :-)

Thanks,

-Greg-
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