尝试连接到本地或 SQL DB 时，我在启动服务器时收到以下错误。因为它在 OOTB 类中调用，所以我无法调试。
lnar-5cg84268sc 2020-01-21 15:07:38,381 ERROR Server.RunLevel ***** PolicyCenter unable to start *****
java.lang.NullPointerException
at gw.api.productmodel.ProductModelDisplayKey.getPath(ProductModelDisplayKey.java:41)
at com.guidewire.pc.api.productmodel.ProductModelObjectBase.verifyDisplayKeyNotEmpty(ProductModelObjectBase.java:647)
at com.guidewire.pc.api.productmodel.ProductModelObjectBase.verifyFields(ProductModelObjectBase.java:587)
at com.guidewire.pc.api.productmodel.AuditSchedulePatternInternal.verifyFields(AuditSchedulePatternInternal.java:187)
at com.guidewire.pc.api.productmodel.ProductModelObjectBase.verify(ProductModelObjectBase.java:523)
at com.guidewire.pc.domain.productmodel.impl.ProductModelImpl.verifyProductModel(ProductModelImpl.java:1685)
at com.guidewire.pc.domain.productmodel.impl.ProductModelImpl.verifyProductModel(ProductModelImpl.java:1640)
at com.guidewire.pc.domain.productmodel.impl.ProductModelImpl.verifyProductModelIfNeeded(ProductModelImpl.java:336)
at com.guidewire.pc.domain.productmodel.impl.ProductModelImpl.lambda$activateVerifyAndLockPatternsIfNeeded$0(ProductModelImpl.java:322)
at com.guidewire.pc.domain.productmodel.impl.ProductModelImpl$$Lambda$325/406648867.accept(Unknown Source)
at com.guidewire.pc.domain.productmodel.impl.ProductModelImpl.lambda$runWithinTransaction$4(ProductModelImpl.java:2099)
at com.guidewire.pc.domain.productmodel.impl.ProductModelImpl$$Lambda$326/1957698296.run(Unknown Source)
at com.guidewire.pl.system.transaction.BootstrapTransaction.run(BootstrapTransaction.java:44)
at com.guidewire.pl.system.transaction.TransactionManagerImpl.execute(TransactionManagerImpl.java:109)
at com.guidewire.pc.domain.productmodel.impl.ProductModelImpl.runWithinTransaction(ProductModelImpl.java:2098)
at com.guidewire.pc.domain.productmodel.impl.ProductModelImpl.activateVerifyAndLockPatternsIfNeeded(ProductModelImpl.java:316)
at com.guidewire.pc.domain.productmodel.impl.ProductModelImpl.start(ProductModelImpl.java:237)
at com.guidewire.pl.system.server.InitTab.startDependency(InitTab.java:465)
at com.guidewire.pc.system.server.PCInitTab.applicationEnterNoDaemons(PCInitTab.java:58)
at com.guidewire.pl.system.server.InitTab.enterNoDaemons(InitTab.java:875)
at com.guidewire.pl.system.server.InitTab.increaseRunLevelTo(InitTab.java:650)
at com.guidewire.pl.system.server.InitTab.setRunLevel(InitTab.java:380)
at com.guidewire.pl.system.servlet.GuidewireStartupServlet.init(GuidewireStartupServlet.java:88)
at javax.servlet.GenericServlet.init(GenericServlet.java:244)
at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:540)
at org.eclipse.jetty.servlet.ServletHolder.initialize(ServletHolder.java:349)
at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:812)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:288)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1322)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:732)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:490)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:118)
at org.eclipse.jetty.server.Server.start(Server.java:342)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:100)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:60)
at org.eclipse.jetty.server.Server.doStart(Server.java:290)
at com.guidewire.commons.jetty.GWServerJettyServerMain$JettyServer.doStart(GWServerJettyServerMain.java:83)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1250)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1174)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.eclipse.jetty.start.Main.invokeMain(Main.java:509)
at org.eclipse.jetty.start.Main.start(Main.java:651)
at org.eclipse.jetty.start.Main.main(Main.java:99)
at com.guidewire.commons.jetty.GWServerJettyServerMain.main(GWServerJettyServerMain.java:69)