Hello,
I am currently working with jbpm 4.3 sample examples and when I try to run one of the examples they provided with hibernate I get this exception.
2:40:09,163 INF | [DefaultCommandService] exception while executing command org.jbpm.pvm.internal.cmd.CheckDbCmd@17653ae
org.jbpm.api.JbpmException: couldn't instantiate hibernate configuration class org.hibernate.cfg.Configuration
at org.jbpm.pvm.internal.wire.descriptor.HibernateConfigurationDescriptor.construct(HibernateConfigurationDescriptor.java:64)
at org.jbpm.pvm.internal.wire.WireContext.construct(WireContext.java:469)
at org.jbpm.pvm.internal.wire.WireContext.create(WireContext.java:448)
at org.jbpm.pvm.internal.wire.WireContext.create(WireContext.java:437)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:417)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:327)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:688)
at org.jbpm.pvm.internal.wire.descriptor.HibernateSessionFactoryDescriptor.construct(HibernateSessionFactoryDescriptor.java:57)
at org.jbpm.pvm.internal.wire.WireContext.construct(WireContext.java:469)
at org.jbpm.pvm.internal.wire.WireContext.create(WireContext.java:448)
at org.jbpm.pvm.internal.wire.WireContext.create(WireContext.java:437)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:417)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:327)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:688)
at org.jbpm.pvm.internal.env.BasicEnvironment.get(BasicEnvironment.java:139)
at org.jbpm.pvm.internal.env.BasicEnvironment.get(BasicEnvironment.java:130)
at org.jbpm.pvm.internal.wire.descriptor.HibernateSessionDescriptor.construct(HibernateSessionDescriptor.java:63)
at org.jbpm.pvm.internal.wire.WireContext.construct(WireContext.java:469)
at org.jbpm.pvm.internal.wire.WireContext.create(WireContext.java:448)
at org.jbpm.pvm.internal.wire.WireContext.create(WireContext.java:437)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:417)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:327)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:688)
at org.jbpm.pvm.internal.env.BasicEnvironment.get(BasicEnvironment.java:139)
at org.jbpm.pvm.internal.env.BasicEnvironment.get(BasicEnvironment.java:130)
at org.jbpm.pvm.internal.env.EnvironmentImpl.getFromCurrent(EnvironmentImpl.java:201)
at org.jbpm.pvm.internal.env.EnvironmentImpl.getFromCurrent(EnvironmentImpl.java:190)
at org.jbpm.pvm.internal.cmd.CheckDbCmd.execute(CheckDbCmd.java:44)
at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42)
at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:54)
at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.executeInNewEnvironment(EnvironmentInterceptor.java:53)
at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:40)
at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55)
at org.jbpm.pvm.internal.svc.SkipInterceptor.execute(SkipInterceptor.java:43)
at org.jbpm.pvm.internal.processengine.ProcessEngineImpl.checkDb(ProcessEngineImpl.java:152)
at org.jbpm.pvm.internal.processengine.ProcessEngineImpl.<init>(ProcessEngineImpl.java:105)
at org.jbpm.pvm.internal.cfg.ConfigurationImpl.buildProcessEngine(ConfigurationImpl.java:94)
at org.jbpm.api.Configuration.getProcessEngine(Configuration.java:121)
at org.jbpm.test.JbpmTestCase.initialize(JbpmTestCase.java:83)
at org.jbpm.test.JbpmTestCase.setUp(JbpmTestCase.java:78)
at org.jbpm.examples.async.activity.AsyncActivityTest.setUp(AsyncActivityTest.java:38)
at junit.framework.TestCase.runBare(TestCase.java:128)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.jbpm.api.JbpmException: couldn't construct new 'org.hibernate.cfg.Configuration' with args null
at org.jbpm.pvm.internal.util.ReflectUtil.newInstance(ReflectUtil.java:117)
at org.jbpm.pvm.internal.util.ReflectUtil.newInstance(ReflectUtil.java:88)
at org.jbpm.pvm.internal.wire.descriptor.HibernateConfigurationDescriptor.construct(HibernateConfigurationDescriptor.java:62)
... 53 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.jbpm.pvm.internal.util.ReflectUtil.newInstance(ReflectUtil.java:114)
... 55 more
Caused by: java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:201)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:220)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:224)
... 60 more
Caused by: java.lang.NullPointerException
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:167)
at org.hibernate.cfg.Environment.<clinit>(Environment.java:558)
... 63 more
### EXCEPTION ###########################################

I am a relatively newbie to Hibernate. Can anyone plz throw some light on this type of exception, possible causes and solutions or help me find a solution ?

-Regards,