What jstack Misses When Your Java Service Uses Virtual Threads
A service with virtual threads can have thousands of requests waiting while jstack shows idle carriers. How to read Thread.dump_to_file …
Java Core
Azul Zulu October 2026 Quarterly Update: 53 CVEs, Then a Zero-Day One Day Later
A record 53 CVEs fixed in the October 2026 quarterly update for Azul Zulu, overtaken within a day by a zero-day: compromised eMudhra CA keys …
Exact Prices in Java: Decimal Strings and BigDecimal Traps
Why double breaks prices, why APIs send them as strings, and the BigDecimal and Jackson traps to avoid when you read, compute and display …
Why Every JVM In Your Fleet Warms Up Alone
Why you can't just copy a JIT-compiled method from one JVM to another: compiled code is a bet on one specific JVM's state. Identity, …
Hello Java 27! Have You Been Working Out?
Java 27 is like that friend that you haven't seen all summer, and when you finally see them again it's clear that they spent a lot of time …
500 viewsFoojay Podcast #101: Java 27 in Practice: Smaller Heaps, Smarter Defaults, and Valhalla on the Horizon
Simon Ritter on JDK 27: compact object headers, G1 everywhere by default, post-quantum TLS, monthly security updates, and Valhalla's first …
One Base URL, Many Coding Agents: What an OpenAI-Compatible Gateway Looks Like From java.net.http
Somewhere in every coding agent there is an HTTP client. Claude Code, Codex, Cursor, Cline, OpenCode: strip away the terminal UI or the …
Masking a JVM thread dump without breaking the analysis
A few weeks ago I posted on r/java about detecting virtual thread pinning from a plain thread dump. The technical discussion was fine. The …
Debugging Is Invariant Discovery: What One Kafka Session Taught Us About AI Agents
Every Java team has a sentence like this one somewhere: Any operation on a TID must go through the single asynchronous path and must not let …
Community Spotlight: BoxLang Express Brings Node-Style HTTP to the JVM
If you've spent years in Spring Boot, Micronaut, or Jakarta EE, "web framework" usually means a servlet container, an embedded Tomcat or …