Bah, my bad.. I was using a different GF Embedded dependency version for my JPA2 project, that seems to have caused the problem. Now I get a different error during startup, but the server continues so it doesn't seem to be a big problem:
WARNING: Exception while performing resource-adapter's security permission check :
java.io.FileNotFoundException: C:\Dev\workspace-admin\simple\gfembed6298667110700233753tmp\config\server.policy (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at java.io.FileReader.<init>(FileReader.java:55)
at com.sun.enterprise.connectors.service.ConnectorConfigurationParserServiceImpl.getFileContent(ConnectorConfigurationParserServiceImpl.java:134)
at com.sun.enterprise.connectors.service.ConnectorConfigurationParserServiceImpl.getSecurityPermissionSpec(ConnectorConfigurationParserServiceImpl.java:93)
at com.sun.enterprise.connectors.ConnectorRuntime.getSecurityPermissionSpec(ConnectorRuntime.java:619)
at com.sun.enterprise.connectors.service.ResourceAdapterAdminServiceImpl.createActiveResourceAdapter(ResourceAdapterAdminServiceImpl.java:225)
at com.sun.enterprise.connectors.service.ResourceAdapterAdminServiceImpl.createActiveResourceAdapter(ResourceAdapterAdminServiceImpl.java:324)
at com.sun.enterprise.connectors.ConnectorRuntime.createActiveResourceAdapter(ConnectorRuntime.java:343)
at com.sun.enterprise.connectors.service.ConnectorService.loadDeferredResourceAdapter(ConnectorService.java:176)
at com.sun.enterprise.connectors.service.ConnectorService.loadResourcesAndItsRar(ConnectorService.java:145)
at com.sun.enterprise.connectors.service.ConnectorService.checkAndLoadPool(ConnectorService.java:317)
at com.sun.enterprise.connectors.service.ConnectorResourceAdminServiceImpl.createConnectorResource(ConnectorResourceAdminServiceImpl.java:99)
at com.sun.enterprise.connectors.ConnectorRuntime.createConnectorResource(ConnectorRuntime.java:283)
at com.sun.enterprise.resource.deployer.JdbcResourceDeployer.deployResource(JdbcResourceDeployer.java:106)
at org.glassfish.javaee.services.ResourceProxy.create(ResourceProxy.java:90)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:531)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:474)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at com.sun.appserv.connectors.internal.api.ResourceNamingService.lookup(ResourceNamingService.java:219)
at com.sun.enterprise.connectors.service.ConnectorResourceAdminServiceImpl.lookup(ConnectorResourceAdminServiceImpl.java:214)
at com.sun.enterprise.connectors.ConnectorRuntime.lookupPMResource(ConnectorRuntime.java:449)
at com.sun.enterprise.connectors.ConnectorRuntime.lookupPMResource(ConnectorRuntime.java:466)
at org.glassfish.persistence.jpa.ProviderContainerContractInfoBase.lookupDataSource(ProviderContainerContractInfoBase.java:62)
at org.glassfish.persistence.jpa.PersistenceUnitInfoImpl.<init>(PersistenceUnitInfoImpl.java:108)
at org.glassfish.persistence.jpa.PersistenceUnitLoader.loadPU(PersistenceUnitLoader.java:154)
at org.glassfish.persistence.jpa.PersistenceUnitLoader.<init>(PersistenceUnitLoader.java:119)
at org.glassfish.persistence.jpa.JPADeployer$1.visitPUD(JPADeployer.java:140)
at org.glassfish.persistence.jpa.JPADeployer$PersistenceUnitDescriptorIterator.iteratePUDs(JPADeployer.java:247)
at org.glassfish.persistence.jpa.JPADeployer.prepare(JPADeployer.java:147)
at com.sun.enterprise.v3.server.ApplicationLifecycle.prepareModule(ApplicationLifecycle.java:719)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:341)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:220)
at org.glassfish.kernel.embedded.EmbeddedDeployerImpl.deploy(EmbeddedDeployerImpl.java:193)
at org.glassfish.kernel.embedded.EmbeddedDeployerImpl.deploy(EmbeddedDeployerImpl.java:142)
at org.glassfish.ejb.embedded.EJBContainerImpl.deploy(EJBContainerImpl.java:137)
at org.glassfish.ejb.embedded.EJBContainerProviderImpl.createEJBContainer(EJBContainerProviderImpl.java:128)
at javax.ejb.embeddable.EJBContainer.createEJBContainer(EJBContainer.java:120)
at no.evote.SimpleServiceTest.setUp(SimpleServiceTest.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.testng.internal.MethodHelper.invokeMethod(MethodHelper.java:641)
at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:525)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:196)
at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:126)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:258)
at org.testng.SuiteRunner.run(SuiteRunner.java:221)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:40)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:83)
at org.testng.internal.thread.ThreadUtil$CountDownLatchedRunnable.run(ThreadUtil.java:151)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
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