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From Imesh Gunaratne <im...@apache.org>
Subject [Discuss] NPE in ParentComponentMonitor
Date Tue, 17 Feb 2015 18:32:49 GMT
Hi Devs,

I see the below NPE:

[2015-02-17 23:59:32,774] ERROR
{org.apache.stratos.messaging.message.receiver.topology.TopologyEventMessageDelegator}
-  Failed to retrieve topology event message
java.lang.NullPointerException
at
org.apache.stratos.autoscaler.monitor.component.ParentComponentMonitor.allDependentTerminated(ParentComponentMonitor.java:499)
at
org.apache.stratos.autoscaler.monitor.component.ParentComponentMonitor.onChildTerminatedEvent(ParentComponentMonitor.java:444)
at
org.apache.stratos.autoscaler.monitor.component.GroupMonitor.onTerminationOfInstance(GroupMonitor.java:408)
at
org.apache.stratos.autoscaler.monitor.component.GroupMonitor.onChildStatusEvent(GroupMonitor.java:391)
at
org.apache.stratos.autoscaler.monitor.events.builder.MonitorStatusEventBuilder.notifyParent(MonitorStatusEventBuilder.java:85)
at
org.apache.stratos.autoscaler.monitor.events.builder.MonitorStatusEventBuilder.handleClusterStatusEvent(MonitorStatusEventBuilder.java:40)
at
org.apache.stratos.autoscaler.monitor.cluster.ClusterMonitor.notifyParentMonitor(ClusterMonitor.java:210)
at
org.apache.stratos.autoscaler.event.receiver.topology.AutoscalerTopologyEventReceiver$8.onEvent(AutoscalerTopologyEventReceiver.java:300)
at
org.apache.stratos.messaging.listener.EventListener.update(EventListener.java:42)
at java.util.Observable.notifyObservers(Observable.java:159)


-- 
Imesh Gunaratne

Technical Lead, WSO2
Committer & PMC Member, Apache Stratos

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