Sorry for not following up in a timely manner; I was on vacation, plus
personal stuff, and now/soon changed jobs.  I mostly just want to connect
to improve the SIP then identify next steps.  Just DM me to connect at your
next convenience.  The outcome will be a better SIP and we share it again.

On Mon, Apr 21, 2025 at 10:42 AM Matthew Biscocho (BLOOMBERG/ 919 3RD A) <
mbisco...@bloomberg.net> wrote:

> Happy to schedule an open video for anyone who wants to join for more
> discussion around the SIP and improve on it. The more the better. Also with
> this over haul, might be worth adding additional metrics or events to
> measure. For example, Solr's prometheus exporter gets live nodes and shard
> state metrics by pulling the GET `/admin/collections CLUSTERSTATUS` API. So
> it's something missing directly from the metrics api. Might be worth
> measuring the event with a gauge instead of it having to call and pull from
> a separate API.
>
> As for OTEL adoption, seems like this is becoming common. Spring Boot uses
> Micrometer for it's metrics framework which itself has a OtlpMeterRegistry
> https://github.com/micrometer-metrics/micrometer/blob/main/implementations/micrometer-registry-otlp/src/main/java/io/micrometer/registry/otlp/OtlpMeterRegistry.java.
> Open Telemetry has a large instrumentation list of support libraries for
> its java agent
> https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/docs/supported-libraries.md#libraries--frameworks
> including a spring boot one that works.
>
> From: dev@solr.apache.org At: 04/18/25 18:07:39 UTC-4:00To:
> dev@solr.apache.org
> Subject: Re: SIP proposal: Switch from DropWizard to OpenTelemetry
>
> It's notable that Solr-core in main already includes OpenTelemetry
> dependencies.  I expect this will be increasingly common, like SLF4J has
> become.
>
> Docker:  definitely a separate topic altogether.  See
> https://issues.apache.org/jira/browse/SOLR-17653 which I'm likely to
> pursue.  I'm very familiar with running Solr in Docker in integration
> tests.
>
> On Fri, Apr 18, 2025 at 10:47 AM Gus Heck <gus.h...@gmail.com> wrote:
>
> > This sounds good to me because Dropwizard metrics is used by the
> Dropwizard
> > framework. Recent experiences where Dropwizard is used as an intermediary
> > layer and integration tests using our test framework have shown it's a
> path
> > to jar hell with Solr wanting one version and the Dropwizard based code
> > wanting another... What I don't know is the extent to which OTel might be
> > adopted by other similar frameworks (what does spring boot usually work
> > with?) The issue of us having several hundred dependencies and folks
> using
> > our test framework is always going to have some clash but maybe this will
> > help?
> >
> > Side topic: I'm aware of at least two places that have come to the
> > conclusion that integrated tests should spin up a separate JVM for solr,
> > and part of me wonders if there's a way to push our test framework to do
> > that natively so that folks using solr don't need to do a lot of
> > engineering to create integration tests. This might also benefit our
> tests
> > by having a separate log for the server and the client side of
> > interactions. Currently, you can't just scroll through and look for the
> > stack trace trivially because often you have one reported from the server
> > and one reported from the test itself. We might even be able to set a "no
> > stack trace in the logs" general standard for the server side of things
> > this way and fail any tests that generate a stack trace to ensure that a
> > healthy solr never logs stack traces. Such a thing might involve having a
> > testing module (not loaded in production) that allows/simplifies
> > configuration without security hurdles...
> >
> > The obvious question of course is speed.... But maybe a solidification of
> > what's an integration test and what's a unit test helps there, and
> > integration tests are intended for build infra, or final checks rather
> than
> > developer testing during development.
> >
> > -Gus
> >
> > On Thu, Apr 17, 2025 at 11:45 PM David Smiley <dsmi...@apache.org>
> wrote:
> >
> > > That's a nice start!  I'd like to work with you on making the SIP
> better.
> > > Maybe a 1:1 (others invited too!) video might be most productive.  I'd
> > love
> > > to involve AB more here.  I think the SIP template that you clearly
> > started
> > > from isn't great; I'm tempted to replace it with a list of
> considerations
> > > and not a proposed format.  People should structure their SIP however
> the
> > > topic best presents itself.
> > >
> > > On Thu, Apr 17, 2025 at 2:34 PM Matthew Biscocho (BLOOMBERG/ 919 3RD
> A) <
> > > mbisco...@bloomberg.net> wrote:
> > >
> > > > Based on the discussion from yesterdays meetup, created SIP-23 for
> > moving
> > > > to Open Telemetry
> > > >
> > >
> >
>
> https://cwiki.apache.org/confluence/display/SOLR/SIP-23%3A+Switch+from+DropWizar
> d+to+OpenTelemetry
> > > >
> > > > With Solr 10 around the corner, hoping this work can get done before
> > > then.
> > > >
> > > > From: dev@solr.apache.org At: 04/14/25 01:04:13 UTC-4:00To:
> > > > dev@solr.apache.org
> > > > Subject: Re: SIP proposal: Switch from DropWizard to OpenTelemetry
> > > >
> > > > I'm excited about the change!  Where I work, it would *significantly*
> > > > simplify our metrics pipeline if Solr were to embrace OTel for
> metrics,
> > > as
> > > > we could then use company-provided OTel plugins.  The broad industry
> > > > adoption of OTel points to this being the least friction.  With
> > > DropWizard,
> > > > it appears we hacked attributes onto it, in a sense.
> > > >
> > > > The primary criteria/requirement that comes to mind is to have
> > > > strong/sophisticated ways to filter the right metrics to publish.
> Solr
> > > has
> > > > that today.
> > > >
> > > > On Fri, Apr 11, 2025 at 5:00 PM Matthew Biscocho (BLOOMBERG/ 919 3RD
> > A) <
> > > > mbisco...@bloomberg.net> wrote:
> > > >
> > > > > Hey everyone,
> > > > >
> > > > > Making this thread because I was interested in writing up a SIP for
> > > > > SOLR-17458 https://issues.apache.org/jira/browse/SOLR-17458 and
> > > starting
> > > > > a discussion around this. The proposed change involves migrating
> > Solr's
> > > > > metrics framework from DropWizard to OpenTelemetry (OTel). This
> will
> > > move
> > > > > Solr to an attribute based metric framework and will also help
> > > > > future-proofing by keeping it from vendor lock-in, given
> > > OpenTelemetry's
> > > > > stance on being vendor-neutral and working with many different
> > > pipelines.
> > > > > Since Solr already packages an Open Telemetry SDK as a module for
> > > > exporting
> > > > > spans through OTLP, we can use that foundation to have it push
> > metrics
> > > as
> > > > > well. There will be a significant change here which will probably
> > break
> > > > > many components and no longer be backwards compatible so this will
> > > > probably
> > > > > need to be a major release version change but we can potentially
> > keep a
> > > > few
> > > > > things backwards compatible if needed. Just some things off the top
> > of
> > > my
> > > > > head:
> > > > >
> > > > > * The Prometheus Exporter (Maybe should be deprecated?)
> > > > > * GET /admin/metrics endpoint
> > > > > * JVM metrics collected from OTel
> > > > > * Metric reporters?
> > > > >
> > > > > Anyone have thoughts?
> > > >
> > > >
> > > >
> > >
> >
> >
> > --
> > http://www.needhamsoftware.com (work)
> > https://a.co/d/b2sZLD9 (my fantasy fiction book)
> >
>
>
>

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