title: wso2 esb error Cannot get all services. Backend service may be unavailable
body: <p>Hi am working with WSO2 ESB 4.7.0</p>
  
  <p>I am facing an error while accessing the wso2 esb management console as shown below.</p>
  
  <p>Error says that one of my service is unable retrieve security scenario for service.</p>
  
  <pre><code>The following error details are available. Please refer logs for more details.
  org.apache.axis2.AxisFault: Cannot get all services. Backend service may be unavailable
  at org.wso2.carbon.service.mgt.ui.ServiceAdminClient.handleException(ServiceAdminClient.java:428)
  at org.wso2.carbon.service.mgt.ui.ServiceAdminClient.getAllServices(ServiceAdminClient.java:89)
  at org.apache.jsp.service_002dmgt.index_jsp._jspService(org.apache.jsp.service_002dmgt.index_jsp:167)
  at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
  at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:403)
  org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:68)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
  at org.wso2.carbon.tomcat.ext.servlet.DelegationServlet.service(DelegationServlet.java:68)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
  at org.wso2.carbon.tomcat.ext.filter.CharacterSetFilter.doFilter(CharacterSetFilter.java:61)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
  at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
  at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:177)
  at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:161)
  at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
  at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:57)
  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
  at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
  at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
  at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1653)
  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)
  Caused by: org.apache.axis2.AxisFault: Cannot retrieve security scenario for service GeoLocationInsertion2.0
  at org.apache.axis2.util.Utils.getInboundFaultFromMessageContext(Utils.java:531)
  at org.apache.axis2.description.OutInAxisOperationClient.handleResponse(OutInAxisOperation.java:367)
  at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:413)
  at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:224)
  at org.apache.axis2.client.OperationClient.execute(OperationClient.java:149)
  at org.wso2.carbon.service.mgt.stub.ServiceAdminStub.listServices(ServiceAdminStub.java:8211)
  at org.wso2.carbon.service.mgt.ui.ServiceAdminClient.getAllServices(ServiceAdminClient.java:87)
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/emsrs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/emsrs.png" alt="enter image description here"></a>
  Any Suggestions....</p>
  
  <p>Thanks...!</p>