Hi Imesh, Me too encounter the same NPE
On Fri, Dec 19, 2014 at 3:33 AM, Martin Eppel (meppel) <[email protected]> wrote: > > I tried to fix it by adding a check (see code snippet) which resolved > the NPE below but caused a new one – I guess it needs more than that … > > > > Code snippet: > > … > > *if (scalingDependencies != null && !scalingDependencies.isEmpty()) {* > > * for (ScalingDependentList scalingDependentList : > scalingDependencies) {* > > * ScalingEvent highestFactorEvent = null;* > > * for (String scalingDependentListComponent : > scalingDependentList.* > > … > > > > New NPE (with fix from code snippet): > > > > *TID: [0] [STRATOS] [2014-12-18 21:56:50,452] ERROR > {org.apache.stratos.messaging.message.receiver.topology.TopologyEventMessageDelegator} > - Failed to retrieve topology event message > {org.apache.stratos.messaging.message.receiver.topology.TopologyEventMessageDelegator}* > > *java.lang.NullPointerException* > > * at > org.apache.stratos.autoscaler.pojo.policy.deployment.DeploymentPolicy.getChildPolicy(DeploymentPolicy.java:213)* > > * at > org.apache.stratos.autoscaler.context.cluster.VMClusterContext.addInstanceContext(VMClusterContext.java:129)* > > * at > org.apache.stratos.autoscaler.event.receiver.topology.AutoscalerTopologyEventReceiver$14.onEvent(AutoscalerTopologyEventReceiver.java:459)* > > * at > org.apache.stratos.messaging.listener.EventListener.update(EventListener.java:42)* > > > > *From:* Imesh Gunaratne [mailto:[email protected]] > *Sent:* Thursday, December 18, 2014 11:48 AM > *To:* dev > *Subject:* NPE in ParentComponentMonitor > > > > Hi Devs, > > > > I'm seeing the below NPE in ParentComponentMonitor: > > > > [2014-12-19 01:15:25,836] INFO > {org.apache.stratos.autoscaler.applications.topic.ApplicationsEventPublisher} > - Publishing Application Active event for [application]: single-group-app > [instance]:single-group-app-1 > > [2014-12-19 01:15:25,866] INFO > {org.apache.stratos.autoscaler.applications.topic.ApplicationsEventPublisher} > - Publishing Group activated event for [application]: single-group-app > [group]: single-group-app-group-1 [instance]:single-group-app-1 > > [2014-12-19 01:16:04,117] ERROR > {org.apache.stratos.autoscaler.monitor.component.ApplicationMonitor} - > Application monitor failed : > org.apache.stratos.autoscaler.monitor.component.ApplicationMonitor@21d2042d > > java.lang.NullPointerException > > at > org.apache.stratos.autoscaler.monitor.component.ParentComponentMonitor.handleDependentScaling(ParentComponentMonitor.java:573) > > at > org.apache.stratos.autoscaler.monitor.component.ApplicationMonitor$1.run(ApplicationMonitor.java:117) > > at > org.apache.stratos.autoscaler.monitor.component.ApplicationMonitor.monitor(ApplicationMonitor.java:125) > > at > org.apache.stratos.autoscaler.monitor.component.ApplicationMonitor.run(ApplicationMonitor.java:74) > > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) > > at > java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304) > > at > java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178) > > at > java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) > > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) > > at java.lang.Thread.run(Thread.java:745) > > > > Thanks > > > > > -- > > Imesh Gunaratne > > > > Technical Lead, WSO2 > > Committer & PMC Member, Apache Stratos > -- Udara Liyanage Software Engineer WSO2, Inc.: http://wso2.com lean. enterprise. middleware web: http://udaraliyanage.wordpress.com phone: +94 71 443 6897
