YARN Ambari metrics cluster metrics not available

[#1]

The cluster memory do not show in the ambari view, please check the attachement.
Any advises

[#2]

You are hitting the BUG : https://issues.apache.org/jira/browse/AMBARI-23309 

which was fixed in ambari-2.7.x versions.

as a workaround you can actualy edit the /usr/lib/ambari-server/web/javascripts/app.js file as like : https://github.com/apache/ambari/pull/738/files

for example:

[root@c3255-node1 javascripts]# diff app.js app.js_backup
35623,35629c35623
<       if (element.isOperator) {
<           // operators should have spaces around in order to differentiate them when symbol is a part of metric name
<           // e.g "metric-a" and "metric1 - metric2"
<           value += " " + element.name + " ";
<         } else {
<           value += element.name;
<         }
---
>         value += element.name;
70943c70937,70938
< VALUE_NAME_REGEX: /[^(\s+\-\*\/\\+\s+)+](\w+\s+\w+)?[\w\.\,\-\:\=\[\]]*/g,
---
>   VALUE_NAME_REGEX: /(\w+\s+\w+)?[\w\.\,\-\:\=\[\]]+/g,
>