🚀 Datasource Micrometer "v1.3.0" (Boot 3.x) and "v2.1.0" (Boot 4.x) are out on Maven Central! ✨ Initial OpenTelemetry Semantic Conventions support via "datasource-micrometer-opentelemetry" module. 📖 Docs: jdbc-observations.github.io/datasource-m... #SpringBoot #Micrometer #OpenTelemetry #jdbc

Updated JOL and heapdump-estimates in it specifically to better support JDK 25. We use this tool to quickly glance where are the opportunities in our real services. Streaming heap dump analysis allows doing this on multi-hundred GB heap dumps. Builds: builds.shipilev.net/jol/

🔍 Learn how to instrument your app for metrics, traces & logs, integrate with OpenTelemetry, and troubleshoot faster with real code samples. Join our hands-on "Observability with Micrometer & Spring Boot 3 + 4" pre-conference workshop with @jonatan-ivanov.bsky.social & @tommyludwig.bsky.social g

Call for Papers for JJUG CCC 2026 Spring is now open! Your submission is highly appreciated. sessionize.com/jjug-ccc-202... #jjug_ccc #jjug

🎉 Great news! Datasource Micrometer is now available on start.spring.io. You can now create a new Spring project with Datasource observation enabled out of the box. #Spring #SpringBoot #Micrometer #Observability #JDBC

Call for Lead Maintainers: GraalVM CE 25 Backports Repository: github.com/oracle/graal...

🤔 Who said that AssertJ 3 is in maintenance mode? 📢 We're planning an exceptional 3.28 release – let us know what you'd like to see in there! 👇 github.com/orgs/assertj...

I don't have any skin in the game on this, but if anyone is using the OTel Zipkin exporter and you would like to continue using it, you should let the OTel folks know: github.com/open-telemet...

🏗️ JEP 500 integrated to JDK 26 Title: Prepare to Make Final Mean Final Type: feature Component: core Release: 26 See openjdk.org/jeps/500

🏗️ JEP 526 integrated to JDK 26 Title: Lazy Constants (Second Preview) Type: feature Component: core / lang Release: 26 See openjdk.org/jeps/526

今日のJJUG CCCに行きたかったけど、宮古島にきちゃった

The GitHub website really struggles with bad internet connections (like airplane wifi)

JJUG CCC もうすぐ800人 #jjug #java 私もセッションやるので、ぜひ参加してね！ jjug.doorkeeper.jp/events/190868

Get your hands on the latest Project #Valhalla Early-Access Build, featuring Value Classes and Objects 🪓 #JDK26 #Java 👉 jdk.java.net/valhalla/

Can We Know Whether a Profiler is Accurate? Spoiler: yes we can! But it took us figuring out a way to work around the fundamental observer effect. stefan-marr.de/2025/10/can-... If you're at SPLASH, don't miss our talk at VMIL today and at OOPSLA on Saturday!

#java JEP 401 on value classes is submitted : openjdk.org/jeps/401

Twitterもう見てないからJJUGのイベントを把握できておらず残念

There is too much work to do and not enough time to do it...

If the C2 compiler is intermittently failing to inline code when running a JMH benchmark with the cause "unloaded signature classes", what's the best way to troubleshoot this? I'm not finding a lot of info online.

Mildly hot take: the mailing list system used for JVM/JDK/Java development are antiquated and not a great solution for the purposes they seem to try to serve.

at my employer, moving from 40% to 60% in-office and embracing hot desks, we’ve lost 80% of IC6 (staff / emeritus) people and about 25% of our IC5 (senior principal) in my org. I gave my notice today to take a full remote job (with a 10% pay cut). They’re down from 6 to 3 SRE and now no manager.

今週末のJJUG CCCの登録数がいつの間にか800人を超えていた！ まだまだキャパ的には余裕があるので、ぜひご参加ください！！ #java #jjug jjug.doorkeeper.jp/events/183483

What's the state of the art on measuring power consumption of a Java process?

I'm so sad I'm not in Barcelona this week for Spring I/O and jealous of all the people who are.

@eddumelendez.bsky.social sorry to ping you here, but I noticed you're a member of SDKMAN and right now it looks like jdk.java.net/25/ EA builds are behind on SDKMAN and I'm not sure where to report it. The latest 25 EA build is 23, but SDKMAN has 16 as the latest: sdkman.io/jdks/open

TIL: since jdk22 you can use the JVM option -XX:LogClassLoadingCauseFor=com.mycompany.MyClass in conjunction with -Xlog:class+load+cause* to find out the stacktrace that triggers the load of the specify class. see github.com/openjdk/jdk/...

I haven't worked at an office in several years. Is it no longer considered rude to loudly have online meetings at your desk?

Evergreen comic from xkcd about standards: xkcd.com/927/

Anyone have any realistic use of Java's Scoped Values they can share? Yes, I know it's still a preview feature, but I can hope there are some eager people out there.

Last call - CFP for #springio25 closes tonight! Pro-tip: AI-related submissions are booming, submissions on other topics could make you stand out.