[AMBARI-23309] YARN cluster memory graph is not loading in Ambari 2.6

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.6.2
• Fix Version/s: 2.7.0
• Component/s: ambari-web
• Labels: pull-request-available
• Assignee: Andrii Tkach
• Reporter: Andrii Tkach
• Created: 21/Mar/18 11:35
• Updated: 27/Mar/18 14:18
• Resolved: 27/Mar/18 13:24

Description

Users are not able to see cluster memory graph under YARN. This was working before upgrade.

We were able to reproduce this internally on Ambari 2.6. We checked across 5 clusters and all of them exhibited same behaviour.

Seems like problem with the compute : mem_total._sum - mem_free._sum fails but mem_total._sum + mem_free._sum succeeds.

Also if we load mem_total._sum AND mem_free._sum individually, they come up fine.

Seems like issue when we do a 'subtract'.

Attaching UI Screenshot

Issue Links

• links to: GitHub Pull Request #738
• links to: GitHub Pull Request #755