Ambari / Metrics tab and adding new metric

[zorel]

Hi. I have a rather strange issue with Ambari metrics tab. When I clic on the metrics, it stops refreshing. I have the actual metrics, not the new ones

I'm not sure if using jdk17 and then G1GC blocks everything, as I see some message about non existent metrics in Firefox JS console (which are ok, metrics for CMS do not exist).

When I try to add a new graph/new widget:

The only error message I see is in ambari-server: (nothing in ambari-e

2026-06-29 16:11:18.920 WARN  [ambari-client-thread-3871] o.e.j.s.HttpChannel:579 - /api/v1/stacks/ODP/versions/1.3/services com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Java 8 optional type `java.util.Optional<org.apache.ambari.server.state.UriInfo>` not supported by default: add Module "com.fasterxml.jackson.datatype:jackson-datatype-jdk8" to enable handling (through reference chain: java.util.ArrayList[0]->org.apache.ambari.server.state.stack.MetricDefinition["jmxSourceUri"])

And when I want to exist the metric page and I click on another part of the app, the breadcrumb changes (or not on Chrome, it just disparears) but not the page, still stuck on metrics:

100% reproductible, both on Chrome and Firefox.

[lucasbak]

Hi @zorel,

Thanks for the issue.
Found the bug, we are rebuilding Ambari and will give you the repo link to check it out,

Best regards,

Clemlab Team

[lucasbak]

Hi @zorel ,

I hope you are alright.
For your info, we did fix the issue on the latest ambari master branch tested it out (we can now add again a metrics), and are backporting it on 2.8.1.0 then recompiling it.
Will keep you up to date once it is built

[lucasbak]

Hi @zorel

The new built ambari 2.8.1.0 containing both issue 80 and 79 fixes is in:

systemctl stop ambari-server
wget https://clemlabs.s3.eu-west-3.amazonaws.com/centos9/ambari-release/2.8.1.0.0-207/ambari.repo -O /etc/yum.repos.d/ambari-fix.repo
yum upgrade -y ambari-server
ambari-server upgrade
systemctl start ambari-server

Check it out !

Best regards,

Clemlab Team

[zorel]

I've lost my test cluster so I'll try it later. I'll open another ticket if necessary.

[zorel]

Same issue with:

Installed Packages
Name         : ambari-server
Version      : 2.8.1.0
Release      : 207
Architecture : x86_64
Size         : 695 M
Source       : ambari-server-2.8.1.0-207.src.rpm
Repository   : @System
From repo    : hadoop-ambari-2810-el9
Summary      : Ambari Server
URL          : https://www.apache.org
License      : 2012, Apache Software Foundation
Description  : Maven Recipe: RPM Package.

[lucasbak]

Hi @zorel

Sorry we missed your latest comment.
Is the issue solved on your side ? on our side build 207 should have been correct but if not we can check it again.

The latest ambari build is 213 ( we need to update the website)
it should include

• the metrics issue fix
• the logsearch portal and feeder exclusion according to a58e0ea

Dont hesitate to tell us ;)

[zorel]

The issue is still here in Ambari 207 for the metrics refresh. Metric creation works. I can try to update on one of our sandbox (not before mid august), but we're deploying live the 207 as I speak. We're not using that much the metric page however, all other pieces (lines in conf, jar exclusion, etc) are in place however.

[lucasbak]

Hi @zorel,

we noticed, that sometime we need to click on the small metrics box, to get the start of the feed. Does it work when you try to zoom on the metrics box and wait like 30s ?
we will try to take the time to investigate more

Kind regards,

Clemlab team