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Project Valhalla, Explained: How a Decade of Work Arrives in JDK 28

https://www.jvm-weekly.com/p/project-valhalla-explained-how-a
90•philonoist•2h ago•47 comments

DuckDB Internals: Why Is DuckDB Fast? (Part 1)

https://www.greybeam.ai/blog/duckdb-internals-part-1
168•marklit•2d ago•57 comments

So You Want to Define a Well-Known URI

https://mnot.net/blog/2026/well_known_uris
56•ingve•3h ago•28 comments

To study how chips work, MIT researchers built their own operating system

https://news.mit.edu/2026/to-study-how-chips-really-work-mit-researchers-built-their-own-operatin...
178•speckx•3d ago•24 comments

Zen and the Art of Machine Learning Research

https://blog.jxmo.io/p/zen-and-the-art-of-machine-learning
50•jxmorris12•3d ago•12 comments

Gribouille 0.3.0: A Grammar of Graphics for Typst

https://mickael.canouil.fr/posts/2026-06-15-gribouille-0-3/
79•mcanouil•3d ago•21 comments

I found 10k GitHub repositories distributing Trojan malware

https://orchidfiles.com/github-repositories-distributing-malware/
784•theorchid•21h ago•204 comments

Zero-Touch OAuth for MCP

https://blog.modelcontextprotocol.io/posts/enterprise-managed-auth/
193•niyikiza•11h ago•66 comments

Fable Converted Pylint to Rust

https://pypi.org/project/prylint/
24•adamraudonis•5h ago•13 comments

How Japan's railways stayed one while splitting apart

https://arun.is/blog/jr-logo/
92•ddrmaxgt37•1d ago•78 comments

The AirPods Effect

https://www.theescapenewsletter.com/p/the-airpods-effect
91•herbertl•10h ago•153 comments

The Raku Foundation is born

https://raku.foundation
19•librasteve•3d ago•6 comments

Datasette Apps: Host custom HTML applications inside Datasette

https://simonwillison.net/2026/Jun/18/datasette-apps/
75•lumpa•8h ago•25 comments

Ubiquiti: Enterprise NAS, Built on ZFS

https://blog.ui.com/article/introducing-enterprise-nas
335•ksec•18h ago•286 comments

Building a robotics research setup that lives next to my desk

https://dfdxlabs.com/research/2026/robotics-setup/
80•mplappert•18h ago•26 comments

Ice water drowning survival of young patient (2025)

https://www.jacc.org/doi/10.1016/j.jaccas.2025.104885
144•js2•5h ago•91 comments

CS 6120: Advanced Compilers: The Self-Guided Online Course (2020)

https://www.cs.cornell.edu/courses/cs6120/2025fa/self-guided/
366•ibobev•22h ago•51 comments

Show HN: Talos – Open-source WASM interpreter for Lean

https://github.com/cajal-technologies/talos
51•mfornet•20h ago•6 comments

.gitignore Isn't the only way to ignore files in Git

https://nelson.cloud/.gitignore-isnt-the-only-way-to-ignore-files-in-git/
412•FergusArgyll•22h ago•129 comments

Hospitals and universities repurposing drugs at lower cost

https://www.kcl.ac.uk/news/hospitals-and-universities-repurposing-drugs-at-90-lower-cost
305•giuliomagnifico•22h ago•140 comments

Cell-based architecture for resilient payment systems

https://americanexpress.io/cell-based-architecture-for-resilient-payment-systems/
123•birdculture•3d ago•48 comments

Flexport (YC W14) Is Hiring in Indonesia, India, and Thailand

https://www.flexport.com/company/careers/
1•thedogeye•8h ago

I told them forced consent was unlawful. 5 years later it cost Elkjop €1.8M

https://www.thatprivacyguy.com/blog/elkjop-forced-consent-fine/
381•speckx•14h ago•216 comments

The Korean telecom giant at the center of Anthropic's Mythos controversy

https://www.wired.com/story/sk-telecom-anthropic-mythos-export-controls/
113•dstala•20h ago•96 comments

W Social, public institutions and the theater of European digital sovereignty

https://blog.elenarossini.com/w-social-public-institutions-and-the-theater-of-european-digital-so...
209•nemoniac•20h ago•137 comments

Many Let's Encrypt renewals had errors today

https://letsencrypt.status.io/#2026
141•widdakay•5h ago•90 comments

Show HN: Are You in the Weights?

https://www.intheweights.com/
340•turtlesoup•12h ago•193 comments

If your product is Great, it doesn't need to be Good (2010)

http://paulbuchheit.blogspot.com/2010/02/if-your-product-is-great-it-doesnt-need.html
78•skogstokig•3d ago•51 comments

Launch HN: TesterArmy (YC P26) – Agents that test web and mobile apps

https://tester.army
119•okwasniewski•18h ago•55 comments

Modos Color Monitor Pushes E-Paper Displays Further

https://spectrum.ieee.org/modos-e-paper-monitor
277•Vinnl•21h ago•68 comments
Open in hackernews

Fixrleak: Fixing Java Resource Leaks with GenAI

https://www.uber.com/blog/fixrleak-fixing-java-resource-leaks-with-genai/
17•carimura•1y ago

Comments

stevoski•1y ago
> “Resource leaks, where resources like files, database connections, or streams aren’t properly released after use, are a persistent issue in Java applications”

This was true maybe back in 2005. Java has had try-with-resources for a loooong time. As I see it this has been the dominant idiom for ages, for handling resources that might leak.

okr•1y ago
People tend to forget. Stream-API is a good candidate, that people like to not consider for leakage. If you don't own your stream, if you do not definitly know, that your stream comes from a collection, then ya better close it with a try-block.
bob778•1y ago
How much effort was spent automating this to fix 112 instances across Uber’s code base? I assume code reviews would catch any new issues so this seems like overkill for a small one-off task?
hawk_•1y ago
Spotbugs or checkstyle etc... would catch these. What does AI add here?
xyst•1y ago
It gives marketing team at Uber to say "wE uSe AI hErE!!1". C-levels approve since anything AI gets a nice pump.

Engineering wise. This adds nothing. It’s an absolute waste of compute and energy to run this through LLMs

sigotirandolas•1y ago
> This analysis ensures that FixrLeak skips functions where resources are passed as parameters, returned, or stored in fields, as these resources often outlive the function’s scope.

> FixrLeak delivers precise, reliable fixes while leaving more complex cases for advanced analysis at the caller level.

In other words, this will only fix trivial leaks, which are best seen as a language design issue and can be fixed by RAII, reference counting, etc.

It won't fix the more insidious leaks like `UNBOUNDED_QUEUE.add(item)` that are more likely to pass through code review in the first place.

xyst•1y ago
Using AI when a static scanner like SonarQube easily picks up these types of resource leaks, especially in Java.

Peak waste.

What’s next?

"Get rid of your GitHub dependabot alerts and replace it with my shitty ChatGPT wrapper”

rvz•1y ago
> Using AI when a static scanner like SonarQube easily picks up these types of resource leaks, especially in Java.

Exactly.

It's very disappointing to see that Uber engineers would rather trust an LLM to that claims to spot these issues when a battle-tested scanner such as SonarQube would have caught this in the first place.

The LLM hype-train is almost just as bad as the JavaScript hype train in the 2010s where some of the worst technologies are used on everything.

rvz•1y ago
Why exactly do you need LLMs for this when efficient alternatives like SonarQube or checkstyle already do this without the expensive waste LLMs create?

This adds little to no technical advantage over existing solutions what so ever for this particular use case.

yahoozoo•1y ago
stupid af
Traubenfuchs•1y ago
So you tell me those 200-600k software engineers that can easily solve leetcode hard are so incompetent they missed using try-with-resources at such scale, they needed to introduce new AI tooling to fix it?

Hey Uber, I am from the EU, I usually can‘t even solve leetcode medium but I will write you scalable, spotless Java for a third of the salary.

Our industry and its economics are a joke.

hello_moto•1y ago
So you write bug-free scalable code 100% in any jobs you ever worked for?

I guess we don’t need QA and Dev/Staging environment

rad_gruchalski•1y ago
Can the QA team? How does the dev/staging environment help writing less buggy code?
rad_gruchalski•1y ago
But can you leetcode heh.
TYMorningCoffee•1y ago
A lot of commenters point out that there already are many established static checkers that do this. That is not what Uber attempts here.

Uber is not proposing a static checker. They even use sonar qube in their architecture. They propose using an LLM to resolve the leak detected by sonar qube.