java.lang.ExceptionInInitializerError: This exception has no message.

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java.lang.ExceptionInInitializerError:
at org.wso2.carbon.apimgt.gateway.throttling.publisher.ThrottleDataPublisherPool.(ThrottleDataPublisherPool.java:50)
at org.wso2.carbon.apimgt.gateway.throttling.publisher.ThrottleDataPublisherPool.(ThrottleDataPublisherPool.java:34)
at org.wso2.carbon.apimgt.gateway.throttling.publisher.ThrottleDataPublisherPool$ThrottleDataPublisherPoolHolder.(ThrottleDataPublisherPool.java:62)
at org.wso2.carbon.apimgt.gateway.throttling.publisher.ThrottleDataPublisherPool.getInstance(ThrottleDataPublisherPool.java:68)
at org.wso2.carbon.apimgt.gateway.throttling.publisher.ThrottleDataPublisher.(ThrottleDataPublisher.java:67)
at org.wso2.carbon.apimgt.gateway.handlers.throttling.ThrottleHandler.(ThrottleHandler.java:131)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at org.apache.synapse.config.xml.rest.APIFactory.defineHandler(APIFactory.java:162)
at org.apache.synapse.config.xml.rest.APIFactory.createAPI(APIFactory.java:103)
at org.apache.synapse.config.xml.SynapseXMLConfigurationFactory.defineAPI(SynapseXMLConfigurationFactory.java:405)
at org.apache.synapse.config.xml.MultiXMLConfigurationBuilder.createAPIs(MultiXMLConfigurationBuilder.java:581)
at org.apache.synapse.config.xml.MultiXMLConfigurationBuilder.getConfiguration(MultiXMLConfigurationBuilder.java:153)
at org.apache.synapse.config.SynapseConfigurationBuilder.getConfiguration(SynapseConfigurationBuilder.java:100)
at org.wso2.carbon.mediation.initializer.CarbonSynapseController.createSynapseConfiguration(CarbonSynapseController.java:180)
at org.apache.synapse.ServerManager.start(ServerManager.java:179)
at org.wso2.carbon.mediation.initializer.ServiceBusInitializer.initESB(ServiceBusInitializer.java:452)
at org.wso2.carbon.mediation.initializer.ServiceBusInitializer.activate(ServiceBusInitializer.java:196)
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.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.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.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
at org.wso2.carbon.inbound.endpoint.persistence.service.InboundEndpointPersistenceServiceDSComponent.activate(InboundEndpointPersistenceServiceDSComponent.java:49)
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.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.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.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
at org.wso2.carbon.core.init.CarbonServerManager.initializeCarbon(CarbonServerManager.java:514)
at org.wso2.carbon.core.init.CarbonServerManager.start(CarbonServerManager.java:219)
at org.wso2.carbon.core.internal.CarbonCoreServiceComponent.activate(CarbonCoreServiceComponent.java:94)
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.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.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.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:1282)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1195)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1085)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5318)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5610)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1572)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

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