Joris Kuipers

God forbid that there’s a plan

Still one of my favorite slides (from youtu.be/w6lQTtyfZqY?...)

TIL that by default, Apache HTTP clients will retry on a 429 and 503 response while respecting the Retry-After header. Then a PHP site that's down b/o the CVEs started to respond with that header set to 3600, and the client happily obliges... 🤦‍♂️ HttpClients.custom().disableAutomaticRetries() FTW

I see we're having a debate about whether it's okay to go back to "X," the site owned by a trillionaire fascist who is currently bankrolling the GOP's midterm, throttled Ukraine's war effort, and still winkingly allows vast amounts of CSAM on his service Answer: No, what the fuck is wrong with you

I hereby declare the hot buttered rum season has started 🍂

So do Americans prefer the state-organized killings over the shootings?

Follow @mcescher.bsky.social, I promise you won’t regret it.

I’ll see your American Confidence and raise you Dutch Courage

TIL that Spring's RestClient does not automatically add an Accept header to its requests like RestTemplate does. We have migrated a lot of clients already, but only now encountered the first backend that compained about a missing Accept header.

JFC, working with GraalVM is worse than getting your OSGi bundles to run with Spring 15 years ago: java.lang.IllegalArgumentException: Invalid logger interface org.hibernate.validator.internal.util.logging.Log (implementation not found) Supposedly fixed, but not for me: github.com/oracle/graal...

Black Keys in Amsterdam tonight, with localized drums 🥁

My presentation from this year’s Spring I/O conference is up on YouTube: if you’re using point-to-point messaging, make sure to check it out for some production-hardened ideas on how to handle dead-lettered messages for your applications and platforms! 📨🍃

📕 I just published my new book Crafting Spring Boot Starters, see www.wimdeblauwe.com/books/crafti... if you are interested! There is a free sample you can check out where you can read the foreword by Phil Webb. The full book also has a zip file with AI skills to audit your Spring Boot starter.

Was expecting a little Andrew Tanenbaum figurine #disney #disappointed #ast

No one doing this already? Is using virtual threads in production really pioneering?

If you think Europe’s GDPR is a bitch, read what & how the American government is actually collecting on its citizens and then we can talk again.

It was really exciting to officially introduce Arconia at Spring I/O last month. Open-source extension improving the developer experience on Spring Boot. I talked about dev services, observability, automated migrations, agent skills, and a sneak peek at the upcoming dev UI. @arconia.io

Planning to use virtual threads with Spring Boot. Means server.tomcat.max-threads will be ignored and server.tomcat.max-connections will effectively determine concurrency, but that's for capping open connections, not actively handled requests. Should I add a semaphore to control concurrency myself?

No better way to get over your King’s Day hangover than some Belgian beer & boogie with Triggerfinger in Paradiso 🎸

Want fewer freezes and bugs in your IntelliJ IDEA? Help us — enable automatic error reporting: Appearance & Behavior → System Settings → Data Sharing → Send error reports automatically Every report helps prioritize fixes. Takes 10 seconds, makes a real difference! #ide #java

Second time I’ll watch this band which I’d never thought I’d be able to see live some years ago!

Leaving Barcelona after another great @springio.net edition. Glad that I could speak again, very happy to have reconnected with so many people and hope to be at #springio27 that will take place in Valencia! 😎 Thanks to @sergialmar.com and everyone else who made this happen 🙏 #springio26

It’s sorta shocking how many people just don’t care about X and Musk and keep posting there. Here’s another thing that might make you change your mind: cybernews.com/tech/x-shado...

Watching @thomasvitale.com explain his Arconia framework for @spring.io development: very cool, will definitely give this a try. Community hero! 🦸‍♂️ #springio26

Google Maps combined with Barcelona public transport really makes it easy to get around. Hadn’t used Maps for this much yet, but have to admit that I’m impressed with the experience #springio26

Home is where the wifi autoconnects: #springio26 may be in a new location, but phone already feels right at home

Starting my trip to Barcelona for @springio.net, really looking forward to reconnecting with everyone! If you’re attending: I will be speaking on DLQ management for large scale systems on Wednesday, so consider to join me 2026.springio.net/sessions/fal...

Take me to church: guitar ensemble at the ANNA church in Amstelveen