If this takes more than 10 seconds you will be exception in the logs. because of that non of the views would work.
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:170)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:704)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:647)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1536)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at org.apache.ambari.server.controller.internal.URLStreamProvider.processURL(URLStreamProvider.java:218)
at org.apache.ambari.server.controller.internal.URLStreamProvider.processURL(URLStreamProvider.java:142)
at org.apache.ambari.server.view.RemoteAmbariStreamProvider.readFrom(RemoteAmbariStreamProvider.java:67)
at org.apache.ambari.server.view.RemoteAmbariCluster.readFromUrlJSON(RemoteAmbariCluster.java:297)
at org.apache.ambari.server.view.RemoteAmbariCluster.access$000(RemoteAmbariCluster.java:51)
at org.apache.ambari.server.view.RemoteAmbariCluster$1.load(RemoteAmbariCluster.java:83)
at org.apache.ambari.server.view.RemoteAmbariCluster$1.load(RemoteAmbariCluster.java:80)
at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3524)
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2317)
... 109 more
Add the below configuration in Remote/Main Ambari server /etc/ambari-server/conf/ambari.properties file.
please note that this needs Ambari-server restart.
views.request.read.timeout.millis=20000
Note: This is tried and tested in Ambari-2.5.0.3 version