Cees Bos 👨🏻‍💻 📉🔍📈 ✅

For both the deep dive and increasing observability: ☝️count me in!

What would you do?

Do you need help? Send me a message ⛑️.

And yes, that gave me sometimes a headache or a restless night. But the reward of having a stable environment is worth it!

Sometimes, however, you cannot find the answer straight away, and you need to increase the observability of your application(s)/infrastructure.

What actually happened? What was the root cause? 😟

🕵️I tempt to opt for the 'hard path' and conduct a thorough investigation, especially in unusual cases with significant impact. I tend to dig as long as I can to find the actual cause and by doing so I already found quite some nasty problems ☺️
🧵

Our OpenValue Wrapped 2025 is here! How many cups of coffee? How many AI pair programming sessions? And did we deploy on Fridays?
Watch the GIF to find out👉

#OpenValueWrapped #BetterSoftwareFaster

🚀 New challenge alert! Can you spot performance issues when using virtual threads? Observability Code Challenge 2 compares regular threads vs virtual threads in Java 21 & 25 using OpenTelemetry and Grafana.

👉 goto.ceesbos.nl/ghch02

#Java #Observability #VirtualThreads #OpenTelemetry #AOCC

Today I had the honor to speak at @devoxx.com about "How I solved production issues with OpenTelemetry (and how you can too)"

📷 Photos taken by Dimitris Doutsiopoulos & @johanhutting.bsky.social

In case you missed it: slides, code examples and more is available
goto.ceesbos.nl/devoxx2025

Upfront you have time to prepare, after the presentation you get some questions etc and other talks with the attendees, then it harder to find time for that.
And with uploading upfront, you can also share the link during the presentation.

Just prepared the last pieces for my presentation at @devoxx.com

I am ready for it, so let's go

#devoxx

Next week #Devoxx Belgium! I am preparing my talk for next week at the moment. Are you joining as well? Hope to see you there @devoxx.com!

m.devoxx.com/events/dvbe2...

I am glad you found the content and I feel honored that you share this as well.
If you have any questions about this, please let me know

screen shot of the newsletter

Check out this week's o11y newsletter with excellent OpenTelemetry hands-on material and more:

o11y.news/2025-05-19/

#observability

@mhausenblas.info
Thanks for adding my talk to the list. There is also a recording made of the talk, but not available yet. Once that is available I will add it to the page as well, that will help to understand the slides and what the demo code is about.

Today I had great time at #JCON2025 presenting 'How I Solved Production Issues with OpenTelemetry (And How You Can Too)".
The @jcon.one conference is really cool to join and talk with fellow developers and share thoughts.

Missed the talk? Check the slides, code and more goto.ceesbos.nl/jcon2025

Excited for #JCON EUROPE 2025? See Cees Bos at #JCON2025 in Cologne talking about 'How I #Solved Production #Issues with #OpenTelemetry (And How You Can Too)'

Ensuring the reliability of your #Java applications is #critical …

Get your free #JUG Ticket: www.jcon.one

🚨 Code Challenge Alert! The first Application Observability Code Challenge explained in a step-by-step approach.
#OpenTelemetry helped to increase the observability, #Grafana helped to visualise it.
👉 goto.ceesbos.nl/bs-c1s

@grafana.bsky.social @opentelemetry.io #Observability

Today I am preparing for #JCON
Within two weeks I will be presenting how #OpenTelemetry can help you with your observability challenges. I am looking forward to the conference!

@jcon.one

Observability: Every Engineer’s Job, Not Just Ops’ Problem Observability is more about software engineering than it is about operations.

Really nice article: thenewstack.io/observabilit... by @martindotnet.bsky.social

This is exactly how I see this as well. Observability is very much an 'every engineer's job'!

🚨 There has been a breakthrough in the world of hash tables 🚨

A paper that disproves the longstanding conjecture that uniform hashing is optimal.

"Optimal Bounds for Open Addressing Without Reordering" by Martín Farach-Colton, Andrew Krapivin, William Kuszmaul

arxiv.org/html/2501.02...

Check out this week's o11y newsletter with really excellent contributions from an o11y challenge to instrumentation tips to tooling:

o11y.news/2025-01-20/

#observability #opentelemetry

Challenge 1 is now available

Nice and simple run without problems

Run with higher load and some problems

🚨 Code Challenge Alert! 🚨Dive into the first Application Observability Challenge 🛠️ Uncover unexpected behavior using test scripts and observability data, then enhance it to prove your fix! Ready to debug? 🤔👩‍💻👨‍💻
https://goto.ceesbos.nl/c1

#CodeChallenge #Observability #OpenTelemetry

📣 Application Observability Code Challenges are coming soon!
Goal: develop an observability mindset and practice with your observability tools.
https://goto.ceesbos.nl/aocc

The first challenge is being prepared! Stay tuned!
#AOCC #OpenTelemetry

I totally agree with you. Observability [123].0 is totally useless if you don't learn and act on it. I am also missing talks about that as well.

I gave it it a try in a talk (goto.ceesbos.nl/fiwo) but closing the loop back to my code is for me the most important part of o11y. Learn and act!!

🎉 Wicked! #GrafanaCON 2025 is headed to Seattle (Emerald City) from May 6-8! As a bonus, we’ve added a full day of workshops on May 6.

We had hundreds of people on our waitlist last time, so sign up to receive notifications tickets go on sale: grafana.com/events/grafa...

#GrafanaCON 2025 has been announced by @grafana.bsky.social 📣
This reminds me of my own talk back in April, it was a great honour to speak at GrafanaCON 2024 see https://goto.ceesbos.nl/gc24

I am looking for to this event in 2025! See https://grafana.com/events/grafanacon/
Maybe on stage again??

🎉 Introducing the #OpenTelemetry Report. This new report presents insights around #OTel's rapid growth, central value, instrumentation, community engagement, and developer traction.

Take a look (no form required!): https://grafana.com/opentelemetry-report

See a few charts and findings in 🧵.

I learned more about Spring Modulith and OpenTelemetry at the @openvalue.eu Utrecht meetup today. Thanks 🙏 @ceesbos.nl and Jos Roseboom and the organisers.

Amazed by the detective skills of @ceesbos.nl shown in his observability talk #opentelemetry

Second talk at the @OpenValue.eu Utrecht meetup: @ceesbos.nl talking about solving issues with OpenTelemetry 👌🏻

Package encapsulation with Spring Modulith && Solving issues with OpenTelemetry, Tue, Dec 3, 2024, 5:30 PM | Meetup We're excited to announce our next meetup Dec 3rd, 2024! As usual, we'll take care of food, drinks and awesome sessions - you just need to bring you ;-) This meetup will f

At a meetup at @openvalue.eu www.meetup.com/openvalue/ev...

I also submitted it as proposal for 2 conferences at the moment.
If there is more interest in this, let me know.

+1
I think that can help the most to make others more excited about observability and it help to show how to use the tools.

This is also exactly the reason why I prepared a presentation about how I solved problems with otel and Grafana for coming Tuesday at a meetup.