Timer does not exist

[realulim]

I tried lightfish and the first stumbling block was that my Derby database wasn't started. So perhaps something like "start Derby with asadmin start-database" might be a useful addition to the readme.

When I had everything set up, I tried to connect with the FX app to Payara 4.1.1-171 and got no data at all. The server.log has a bunch of entries like these:

javax.ejb.FinderException: timer 4@@1489395259444@@server@@domain1 does not exist
at org.glassfish.ejb.persistent.timer.PersistentEJBTimerService.getPersistentTimer(PersistentEJBTimerService.java:1114)
at org.glassfish.ejb.persistent.timer.PersistentEJBTimerService.getNextTimeout(PersistentEJBTimerService.java:1004)
at com.sun.ejb.containers.TimerWrapper.getNextTimeout(TimerWrapper.java:118)
at org.lightfish.business.servermonitoring.boundary.MonitoringController.nextTimeout(MonitoringController.java:104)
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:498)
at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081)
at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153)
at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4762)
at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:656)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:834)
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608)
at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:64)
at org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:52)
at sun.reflect.GeneratedMethodAccessor413.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:895)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:834)
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608)
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163)
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:140)
at sun.reflect.GeneratedMethodAccessor412.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:895)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:834)
at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:374)
at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4734)
at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4722)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:212)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:90)
at com.sun.proxy.$Proxy330.nextTimeout(Unknown Source)
at org.lightfish.business.servermonitoring.boundary.EJB31_Generated__MonitoringController__Intf____Bean.nextTimeout(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:433)
at org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:127)
at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56)
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:100)
at org.lightfish.business.servermonitoring.boundary.MonitoringController$Proxy$_$$_Weld$EnterpriseProxy$.nextTimeout(Unknown Source)
at org.lightfish.business.administration.boundary.PollingResource.status(PollingResource.java:57)

And there is also a NPE:

Caused by: java.lang.NullPointerException
at org.lightfish.business.servermonitoring.control.collectors.RestDataCollector.getInt(RestDataCollector.java:49)
at org.lightfish.business.servermonitoring.control.collectors.RestDataCollector.getInt(RestDataCollector.java:39)
at org.lightfish.business.servermonitoring.control.collectors.paranormal.BusyThreadCollector.apply(BusyThreadCollector.java:17)
at org.lightfish.business.servermonitoring.control.collectors.paranormal.BusyThreadCollector.apply(BusyThreadCollector.java:11)

Not sure if both errors are related.