@amarnath reddy pappu Thanks for the response. I see the timeout in the UI, as in this screenshot: This is the accompanying error in streamline.log ERROR [2018-08-13 21:38:01.543] [dw-50 - POST /api/v1/catalog/cluster/import/ambari] c.h.s.s.c.r.ClusterCatalogResource - Got exception: [RuntimeException] / message [java.lang.RuntimeException: javax.ws.rs.ProcessingException: java.net.ConnectException: Connection timed out (Connection timed out)] / related resource location: [com.hortonworks.streamline.streams.cluster.resource.ClusterCatalogResource.importServicesFromAmbari](ClusterCatalogResource.java:282) java.lang.RuntimeException: java.lang.RuntimeException: javax.ws.rs.ProcessingException: java.net.ConnectException: Connection timed out (Connection timed out) 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.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:593) at java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:677) at java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:735) at java.util.stream.ReduceOps$ReduceOp.evaluateParallel(ReduceOps.java:714) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:233) at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) at com.hortonworks.streamline.streams.cluster.ClusterImporter.fetchServices(ClusterImporter.java:75) at com.hortonworks.streamline.streams.cluster.ClusterImporter.importCluster(ClusterImporter.java:59) at com.hortonworks.streamline.streams.cluster.service.EnvironmentService.importClusterServices(EnvironmentService.java:85) at com.hortonworks.streamline.streams.cluster.resource.ClusterCatalogResource.importServicesFromAmbari(ClusterCatalogResource.java:282) 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.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:160) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99) at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102) at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:267) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305) at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154) at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473) at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228) at io.dropwizard.jetty.NonblockingServletHolder.handle(NonblockingServletHolder.java:49) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1689) at io.dropwizard.servlets.ThreadNameFilter.doFilter(ThreadNameFilter.java:34) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676) at io.dropwizard.jersey.filter.AllowedMethodsFilter.handle(AllowedMethodsFilter.java:50) at io.dropwizard.jersey.filter.AllowedMethodsFilter.doFilter(AllowedMethodsFilter.java:44) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676) at com.hortonworks.registries.auth.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:595) at com.hortonworks.registries.auth.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:553) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1174) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1106) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134) at com.codahale.metrics.jetty9.InstrumentedHandler.handle(InstrumentedHandler.java:240) at io.dropwizard.jetty.RoutingHandler.handle(RoutingHandler.java:51) at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:396) at io.dropwizard.jetty.BiDiGzipHandler.handle(BiDiGzipHandler.java:68) at org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:56) at org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:169) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134) at org.eclipse.jetty.server.Server.handle(Server.java:524) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:319) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:253) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95) at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93) at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303) at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148) at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) at java.lang.Thread.run(Thread.java:748) <br> Let me know if you need any further information. ... 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