frontpage.
newsnewestaskshowjobs

Open Source @Github

fp.

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.

New paper shows that 37% of workers in US saw real wages decline from 2021-2024 [pdf]

https://bfi.uchicago.edu/wp-content/uploads/2026/08/BFI_WP_2026-108-1.pdf
253•jplusequalt•2h ago•123 comments

Meta's blockbuster trial draws parallels to big tobacco

https://www.economist.com/business/2026/08/18/metas-blockbuster-trial-draws-parallels-to-big-tobacco
48•newsomix9xl•1h ago•20 comments

OpenLogi

https://openlogi.org/en
59•amatheus•1h ago•9 comments

Cerebras CS-4

https://www.cerebras.ai/cs4
123•sunils34•3h ago•79 comments

A 3D fruit fly on macOS desktop powered by the real FlyWire connectome

https://github.com/DenisSergeevitch/desktop-fly
191•phoenix120•5h ago•51 comments

The Amazon tax

https://seths.blog/2026/08/the-amazon-tax/
993•herbertl•14h ago•574 comments

Solo – a .so loader for static Linux binaries

https://github.com/pg83/solo
68•zX41ZdbW•3h ago•70 comments

How does IKEA come up with names for its products?

https://www.ikea.com/se/en/customer-service/knowledge/articles/6f564c4d-2ccc-46de-b643-545a3948dc...
256•NaOH•9h ago•151 comments

Scientists stunned by children's lung recovery in ultra low emission zone

https://www.bbc.com/news/articles/c1l1r1zne1ro
58•dabinat•2h ago•29 comments

Palomar: A registry of Lean verified mathematics

https://terrytao.wordpress.com/2026/08/18/palomar-a-registry-of-lean-verified-mathematics/
8•matt_d•1h ago•0 comments

CUDA Shared Memory Swizzling

https://leimao.github.io/blog/CUDA-Shared-Memory-Swizzling/
7•jxmorris12•5d ago•0 comments

AI usage patterns in software teams

https://linear.app/data
66•giuliomagnifico•5h ago•31 comments

Show HN: Interactive, animated architecture of any HuggingFace models

https://modelmap.cc
46•lizhaoliu•3h ago•7 comments

Turbovec – Google's TurboQuant for vector search in Rust

https://github.com/RyanCodrai/turbovec
213•fittingopposite•9h ago•30 comments

Cursor launches Origin, GitHub alternative

https://cursor.com/changelog/origin-code-hosting
502•tomasreimers•1d ago•385 comments

Using the railway network as a flatbed scanner

https://philo.gay/linecam/
412•otherayden•15h ago•68 comments

That Disgraceful, Disreputable, (Wonderful) Form of Punctuation: The Parenthesis

https://lithub.com/on-that-disgraceful-disreputable-wonderful-form-of-punctuation-the-parenthesis/
17•pseudolus•2h ago•2 comments

And then the men with guns tell you to do it anyway

https://shkspr.mobi/blog/2026/08/and-then-the-men-with-guns-tell-you-to-do-it-anyway/
204•_djo_•10h ago•116 comments

Fixing a bricked Framework laptop

https://quantum5.ca/2026/08/16/fixing-bricked-amd-7040-series-framework-13-laptop-with-20-tools/
380•jp_sc•14h ago•258 comments

Memory prices climb 500% in 12 months

https://www.tomshardware.com/pc-components/ram/memory-prices-climb-500-percent-in-12-months-up-to...
520•haunter•1d ago•435 comments

A 25-year-old video patent just expired, ending a legal headache for Linux

https://www.xda-developers.com/25-year-old-brazilian-video-patent-expired-legal-headache-linux/
113•theanonymousone•3d ago•42 comments

Tiny satellite will use the dark side of the Moon as a shield

https://www.cam.ac.uk/research/news/tiny-satellite-will-use-the-dark-side-of-the-moon-to-eavesdro...
16•NordStreamYacht•2h ago•1 comments

The 90-year history of the binoculars bolted to scenic overlooks

https://www.dpreview.com/news/the-90-year-history-of-the-binoculars-bolted-to-scenic-overlooks/
35•sohkamyung•5h ago•7 comments

Being ambitious and being a dad

https://nicholascharriere.com/blog/being-ambitious-and-being-a-dad/
340•nichochar•2d ago•205 comments

Beware Management Consultants

https://about.iceland.co.uk/our-story/the-dark-ages/beware-management-consultants/
465•KolmogorovComp•8h ago•125 comments

Universal health coverage could save $1T and 114k lives a year: study

https://ysph.yale.edu/news-article/universal-health-coverage-could-save-one-trillion-dollars-and-...
760•karakoram•1d ago•826 comments

GLM-5.3 Artificial Analysis Benchmarks

https://artificialanalysis.ai/models/glm-5-3
97•apitman•5h ago•43 comments

Apple announces changes for apps in the European Union

https://www.apple.com/newsroom/2026/08/apple-announces-changes-for-apps-in-the-european-union/
127•newusertoday•11h ago•188 comments

How a giant battery is transforming a town centre in Cannington, Ontario

https://betakit.com/how-a-giant-battery-is-transforming-a-town-centre-in-cannington-ontario/
27•builtbystef•4d ago•12 comments

Launch HN: machine0 (YC S26) – Persistent CPU and GPU VMs from the CLI

https://machine0.io
66•bwm•11h ago•41 comments