WSO2 throws EmptyStackException while trying federated login

I have two WSO2 Identity server running in same machine, one is identity server another on the federated identity server to replicate federated login, When i access from client spring boot applicaiton Identity server throws the following exception. Need some advice..

ERROR {org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/oauth2].[OAuth2Endpoints]} - Servlet.service() for servlet [OAuth2Endpoints] in context with path [/oauth2] threw exception java.util.EmptyStackException at java.util.Stack.peek(Stack.java:102)

My WSO2 version is : 5.9.0

Detailed logs:

ERROR {org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/oauth2].[OAuth2Endpoints]} - Servlet.service() for servlet [OAuth2Endpoints] in context with path [/oauth2] threw exception java.util.EmptyStackException at java.util.Stack.peek(Stack.java:102) at java.util.Stack.pop(Stack.java:84) at org.wso2.carbon.context.internal.CarbonContextDataHolder.endTenantFlow(CarbonContextDataHolder.java:1295) at org.wso2.carbon.context.PrivilegedCarbonContext.endTenantFlow(PrivilegedCarbonContext.java:75) at org.wso2.carbon.identity.oauth.endpoint.authz.OAuth2AuthzEndpoint.authorize(OAuth2AuthzEndpoint.java:250) at sun.reflect.GeneratedMethodAccessor246.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:179) at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96) at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:193) at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:103) at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59) at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96) at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308) at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121) at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267) at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234) at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208) at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160) at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:216) at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:301) at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:225) at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:276) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.wso2.carbon.webapp.mgt.filter.AuthorizationHeaderFilter.doFilter(AuthorizationHeaderFilter.java:85) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.wso2.carbon.ui.filters.cache.ContentTypeBasedCachePreventionFilter.doFilter(ContentTypeBasedCachePreventionFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.filters.HttpHeaderSecurityFilter.doFilter(HttpHeaderSecurityFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.wso2.carbon.identity.context.rewrite.valve.TenantContextRewriteValve.invoke(TenantContextRewriteValve.java:80) at org.wso2.carbon.identity.authz.valve.AuthorizationValve.invoke(AuthorizationValve.java:100) at org.wso2.carbon.identity.auth.valve.AuthenticationValve.invoke(AuthenticationValve.java:74) at org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:99) at org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:49) at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:62) at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:146) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678) at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:57) at org.wso2.carbon.tomcat.ext.valves.RequestCorrelationIdValve.invoke(RequestCorrelationIdValve.java:116) at org.wso2.carbon.tomcat.ext.valves.RequestEncodingValve.invoke(RequestEncodingValve.java:49) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)