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https://issues.apache.org/jira/browse/AMBARI-15892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15241997#comment-15241997
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Hudson commented on AMBARI-15892:
---------------------------------
FAILURE: Integrated in Ambari-branch-2.2 #636 (See
[https://builds.apache.org/job/Ambari-branch-2.2/636/])
AMBARI-15892 : Incorrect (Negative) values are shown for memory metrics
(avijayan:
[http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=259e12dd78cad2ff70cdc5868261f0422ee1c8a6])
* ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/widgets.json
*
ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog222.java
* ambari-server/src/main/resources/stacks/HDP/2.3/services/HDFS/widgets.json
> Incorrect (Negative) values are shown for memory metrics
> --------------------------------------------------------
>
> Key: AMBARI-15892
> URL: https://issues.apache.org/jira/browse/AMBARI-15892
> Project: Ambari
> Issue Type: Bug
> Reporter: Aravindan Vijayan
> Assignee: Aravindan Vijayan
> Priority: Blocker
> Attachments: AMBARI-15892.patch
>
>
> Issue
> In the "NameNode HostLoad" graph, the negative values are seen for the
> computed metric "Memory Utilization" which goes by the formula :
> ( mem_total - (mem_free + mem_cache) ) *100 / mem_total
> Bug
> AMBARI-15448 changed the way memory metrics are being reported to AMS. This
> lead to a double subtraction of mem_cached, thereby leading to a negative
> value intermittently.
> Fix
> Change the widget to :
> ( mem_total - mem_free ) *100 / mem_total
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