Hi Malaka, This is not a bug, but as the message says, this is because, in your "manager" node, which I guess, did not register the task type, so it will not participate in executing the tasks, but it can register and schedule tasks to be run in other nodes. So if this manager node registers and gives a command to say "schedule", it will look in the cluster for possible workers to schedule and execute the task. If there aren't any workers (nodes which has registered that task type) available, it will give this error saying, the task could not be registered, which is what should be done, or else, the caller will get a false confirmation saying, the task is scheduled and running.
So basically the point is, before a task is "scheduled", we have to make sure, possible workers are there to run it. Cheers, Anjana. On Wed, May 27, 2015 at 10:59 AM, Malaka Silva <[email protected]> wrote: > Hi, > > While checking the tasks observer the following error. > > This happens only when scheduling a task from manager. My understanding > was NTASK have the same behavior in manager and worker nodes. Is it the > case? > > This happens because in the following code. When starting manager node > memberlist is empty. But starting a worker first, member list contains that > member. > > I guess this is a bug? > > This will not effect the functionality in ESB however error is printed on > startup. > > TaskServiceContext ctx = this.getTaskServiceContext(); > if (ctx.getServerCount() == 0) { > throw new TaskException("No available task nodes for resolving > a task location", > Code.TASK_NODE_NOT_AVAILABLE); > } > > [1] > https://github.com/wso2/carbon-commons/blob/master/components/ntask/org.wso2.carbon.ntask.core/src/main/java/org/wso2/carbon/ntask/core/impl/clustered/ClusteredTaskManager.java > [2] > https://github.com/wso2/carbon-commons/blob/master/components/ntask/org.wso2.carbon.ntask.core/src/main/java/org/wso2/carbon/ntask/core/TaskServiceContext.java > > > [2015-05-27 09:39:42,807] ERROR - NTaskTaskManager Scheduling task > [[NTask::-1234::file-FILE--SYNAPSE_INBOUND_ENDPOINT]::FILE--SYNAPSE_INBOUND_ENDPOINT] > FAILED. Error: No available task nodes for resolving a task location > org.wso2.carbon.ntask.common.TaskException: No available task nodes for > resolving a task location > at > org.wso2.carbon.ntask.core.impl.clustered.ClusteredTaskManager.getTaskLocation(ClusteredTaskManager.java:224) > at > org.wso2.carbon.ntask.core.impl.clustered.ClusteredTaskManager.locateMemberForTask(ClusteredTaskManager.java:201) > at > org.wso2.carbon.ntask.core.impl.clustered.ClusteredTaskManager.getMemberIdFromTaskName(ClusteredTaskManager.java:275) > at > org.wso2.carbon.ntask.core.impl.clustered.ClusteredTaskManager.scheduleTask(ClusteredTaskManager.java:86) > at > org.wso2.carbon.mediation.ntask.NTaskTaskManager.schedule(NTaskTaskManager.java:89) > at > org.wso2.carbon.mediation.ntask.NTaskTaskManager.init(NTaskTaskManager.java:336) > at > org.wso2.carbon.mediation.ntask.NTaskTaskManager.update(NTaskTaskManager.java:349) > at > org.wso2.carbon.mediation.ntask.internal.NtaskService.updateAndCleanupObservers(NtaskService.java:103) > at > org.wso2.carbon.mediation.ntask.internal.NtaskService.setConfigurationContextService(NtaskService.java:96) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at > org.eclipse.equinox.internal.ds.model.ComponentReference.bind(ComponentReference.java:376) > at > org.eclipse.equinox.internal.ds.model.ServiceComponentProp.bindReference(ServiceComponentProp.java:430) > at > org.eclipse.equinox.internal.ds.model.ServiceComponentProp.bind(ServiceComponentProp.java:218) > at > org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:343) > at > org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620) > at > org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197) > at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343) > at > org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222) > at > org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861) > at > org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) > at > org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:451) > at > org.wso2.carbon.ntask.core.internal.TasksDSComponent.activate(TasksDSComponent.java:106) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at > org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260) > at > org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146) > at > org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345) > at > org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620) > at > org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197) > at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343) > at > org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222) > at > org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861) > at > org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) > at > org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:451) > at > org.wso2.carbon.core.internal.StartupFinalizerServiceComponent.completeInitialization(StartupFinalizerServiceComponent.java:199) > at > org.wso2.carbon.core.internal.StartupFinalizerServiceComponent.serviceChanged(StartupFinalizerServiceComponent.java:288) > at > org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861) > at > org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) > at > org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:451) > at > org.wso2.carbon.throttling.agent.internal.ThrottlingAgentServiceComponent.registerThrottlingAgent(ThrottlingAgentServiceComponent.java:123) > at > org.wso2.carbon.throttling.agent.internal.ThrottlingAgentServiceComponent.activate(ThrottlingAgentServiceComponent.java:100) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at > org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260) > at > org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146) > at > org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345) > at > org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620) > at > org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197) > at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343) > at > org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222) > at > org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861) > at > org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) > at > org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:451) > at > org.wso2.carbon.core.init.CarbonServerManager.initializeCarbon(CarbonServerManager.java:517) > at > org.wso2.carbon.core.init.CarbonServerManager.start(CarbonServerManager.java:219) > at > org.wso2.carbon.core.internal.CarbonCoreServiceComponent.activate(CarbonCoreServiceComponent.java:91) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at > org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260) > at > org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146) > at > org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345) > at > org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620) > at > org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197) > at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343) > at > org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222) > at > org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861) > at > org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) > at > org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130) > at > org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214) > at > org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433) > at > org.eclipse.equinox.http.servlet.internal.Activator.registerHttpService(Activator.java:81) > at > org.eclipse.equinox.http.servlet.internal.Activator.addProxyServlet(Activator.java:60) > at > org.eclipse.equinox.http.servlet.internal.ProxyServlet.init(ProxyServlet.java:40) > at > org.wso2.carbon.tomcat.ext.servlet.DelegationServlet.init(DelegationServlet.java:38) > at > org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1284) > at > org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1197) > at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1087) > at > org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5262) > at > org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5550) > at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) > at > org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575) > at > org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565) > at java.util.concurrent.FutureTask.run(FutureTask.java:262) > 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) > > > Best Regards, > > Malaka Silva > Senior Tech Lead > M: +94 777 219 791 > Tel : 94 11 214 5345 > Fax :94 11 2145300 > Skype : malaka.sampath.silva > LinkedIn : http://www.linkedin.com/pub/malaka-silva/6/33/77 > Blog : http://mrmalakasilva.blogspot.com/ > > WSO2, Inc. > lean . enterprise . middleware > http://www.wso2.com/ > http://www.wso2.com/about/team/malaka-silva/ > <http://wso2.com/about/team/malaka-silva/> > > Save a tree -Conserve nature & Save the world for your future. Print this > email only if it is absolutely necessary. > -- *Anjana Fernando* Senior Technical Lead WSO2 Inc. | http://wso2.com lean . enterprise . middleware
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