frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

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•7mo ago

Comments

stevoski•7mo 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•7mo 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•7mo 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_•7mo ago
Spotbugs or checkstyle etc... would catch these. What does AI add here?
xyst•7mo 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•7mo 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•7mo 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•7mo 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•7mo 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•7mo ago
stupid af
Traubenfuchs•7mo 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•6mo 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•6mo ago
Can the QA team? How does the dev/staging environment help writing less buggy code?
rad_gruchalski•6mo ago
But can you leetcode heh.
TYMorningCoffee•7mo 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.

We built another object storage

https://fractalbits.com/blog/why-we-built-another-object-storage/
60•fractalbits•2h ago•11 comments

Java FFM zero-copy transport using io_uring

https://www.mvp.express/
26•mands•5d ago•6 comments

How exchanges turn order books into distributed logs

https://quant.engineering/exchange-order-book-distributed-logs.html
50•rundef•5d ago•17 comments

macOS 26.2 enables fast AI clusters with RDMA over Thunderbolt

https://developer.apple.com/documentation/macos-release-notes/macos-26_2-release-notes#RDMA-over-...
467•guiand•18h ago•237 comments

AI is bringing old nuclear plants out of retirement

https://www.wbur.org/hereandnow/2025/12/09/nuclear-power-ai
35•geox•2h ago•26 comments

Sick of smart TVs? Here are your best options

https://arstechnica.com/gadgets/2025/12/the-ars-technica-guide-to-dumb-tvs/
435•fleahunter•1d ago•363 comments

Photographer built a medium-format rangefinder, and so can you

https://petapixel.com/2025/12/06/this-photographer-built-an-awesome-medium-format-rangefinder-and...
78•shinryuu•6d ago•10 comments

Apple has locked my Apple ID, and I have no recourse. A plea for help

https://hey.paris/posts/appleid/
873•parisidau•10h ago•450 comments

GNU Unifont

https://unifoundry.com/unifont/index.html
288•remywang•18h ago•68 comments

A 'toaster with a lens': The story behind the first handheld digital camera

https://www.bbc.com/future/article/20251205-how-the-handheld-digital-camera-was-born
42•selvan•5d ago•18 comments

Beautiful Abelian Sandpiles

https://eavan.blog/posts/beautiful-sandpiles.html
84•eavan0•3d ago•16 comments

Rats Play DOOM

https://ratsplaydoom.com/
335•ano-ther•18h ago•123 comments

Show HN: Tiny VM sandbox in C with apps in Rust, C and Zig

https://github.com/ringtailsoftware/uvm32
167•trj•17h ago•11 comments

OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI

https://simonwillison.net/2025/Dec/12/openai-skills/
481•simonw•15h ago•272 comments

Computer Animator and Amiga fanatic Dick Van Dyke turns 100

110•ggm•6h ago•23 comments

Will West Coast Jazz Get Some Respect?

https://www.honest-broker.com/p/will-west-coast-jazz-finally-get
10•paulpauper•6d ago•2 comments

Formula One Handovers and Handovers From Surgery to Intensive Care (2008) [pdf]

https://gwern.net/doc/technology/2008-sower.pdf
82•bookofjoe•6d ago•33 comments

Show HN: I made a spreadsheet where formulas also update backwards

https://victorpoughon.github.io/bidicalc/
179•fouronnes3•1d ago•85 comments

Freeing a Xiaomi humidifier from the cloud

https://0l.de/blog/2025/11/xiaomi-humidifier/
126•stv0g•1d ago•51 comments

Obscuring P2P Nodes with Dandelion

https://www.johndcook.com/blog/2025/12/08/dandelion/
57•ColinWright•4d ago•1 comments

Go is portable, until it isn't

https://simpleobservability.com/blog/go-portable-until-isnt
120•khazit•6d ago•101 comments

Ensuring a National Policy Framework for Artificial Intelligence

https://www.whitehouse.gov/presidential-actions/2025/12/eliminating-state-law-obstruction-of-nati...
169•andsoitis•1d ago•217 comments

Poor Johnny still won't encrypt

https://bfswa.substack.com/p/poor-johnny-still-wont-encrypt
52•zdw•10h ago•66 comments

YouTube's CEO limits his kids' social media use – other tech bosses do the same

https://www.cnbc.com/2025/12/13/youtubes-ceo-is-latest-tech-boss-limiting-his-kids-social-media-u...
86•pseudolus•3h ago•67 comments

Slax: Live Pocket Linux

https://www.slax.org/
41•Ulf950•5d ago•5 comments

50 years of proof assistants

https://lawrencecpaulson.github.io//2025/12/05/History_of_Proof_Assistants.html
107•baruchel•15h ago•17 comments

Gild Just One Lily

https://www.smashingmagazine.com/2025/04/gild-just-one-lily/
29•serialx•5d ago•5 comments

Capsudo: Rethinking sudo with object capabilities

https://ariadne.space/2025/12/12/rethinking-sudo-with-object-capabilities.html
75•fanf2•17h ago•44 comments

Google removes Sci-Hub domains from U.S. search results due to dated court order

https://torrentfreak.com/google-removes-sci-hub-domains-from-u-s-search-results-due-to-dated-cour...
193•t-3•11h ago•35 comments

String theory inspires a brilliant, baffling new math proof

https://www.quantamagazine.org/string-theory-inspires-a-brilliant-baffling-new-math-proof-20251212/
167•ArmageddonIt•22h ago•154 comments