[hadoop] branch trunk updated: HDFS-15013. Reduce NameNode overview tab response time. Contributed by HuangTao.

[surendralilhore]

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surendralilhore pushed a commit to branch trunk
in repository https://gitbox.apache.org/repos/asf/hadoop.git


The following commit(s) were added to refs/heads/trunk by this push:
     new 44f7b91  HDFS-15013. Reduce NameNode overview tab response time. 
Contributed by HuangTao.
44f7b91 is described below

commit 44f7b9159d8eec151f199231bafe0677f9383dc3
Author: Surendra Singh Lilhore <surendralilh...@apache.org>
AuthorDate: Fri Nov 29 00:42:31 2019 +0530

    HDFS-15013. Reduce NameNode overview tab response time. Contributed by 
HuangTao.
---
 .../hadoop-hdfs/src/main/webapps/hdfs/dfshealth.js      | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/dfshealth.js 
b/hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/dfshealth.js
index d12a9fb..0d9de3e 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/dfshealth.js
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/dfshealth.js
@@ -65,8 +65,9 @@
     };
 
     var data = {};
+    var non_ha = false;
 
-    $.ajax({'url': '/conf', 'dataType': 'xml', 'async': false}).done(
+    $.ajax({'url': '/conf', 'dataType': 'xml', 'async': true}).done(
       function(d) {
         var $xml = $(d);
         var namespace, nnId;
@@ -80,6 +81,8 @@
         });
         if (namespace && nnId) {
           data['HAInfo'] = {"Namespace": namespace, "NamenodeID": nnId};
+        } else {
+          non_ha = true;
         }
     });
 
@@ -109,7 +112,17 @@
 
         data.fs.ObjectsTotal = data.fs.FilesTotal + data.fs.BlocksTotal;
 
-        render();
+        var wait_for_conf =  setInterval(function() {
+          if (non_ha ||
+              (('HAInfo' in data) &&
+                  ("Namespace" in data['HAInfo']) &&
+                  ("NamenodeID" in data['HAInfo'])
+              )
+          ) {
+            render();
+            clearInterval(wait_for_conf);
+          }
+        }, 5);
       }),
       function (url, jqxhr, text, err) {
         show_err_msg('<p>Failed to retrieve data from ' + url + ', cause: ' + 
err + '</p>');


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