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New guy: There's a memory leak in my code.
Me: You need to free the memory you previously allocated.
New guy: Already did that, deleted everything from my "Downloads" folder and some stuff from my Desktop.
Me: *Long Pause* Have you tried "rm -rf /" yet ?4 -
Had a PR blocked yesterday. Oh god, have I introduced a memory leak? Have I not added unit tests? Is there a bug? What horrible thing have I unknowingly done?
... added comments to some code.
Yep apparently “our code needs to be readable without comments, please remove them”.
Time to move on, no signs of intelligent life here.39 -
Story about an obscure bug: https://twitter.com/mmalex/status/...
"We had a ‘fun’ one on LittleBigPlanet 1: 2 weeks to gold, a Japanese QA tester started reliably crashing the game by leaving it on over night. We could not repro. Like you, days of confirmation of identical environment, os, hardware, etc; each attempt took over 24h, plus time differences, and still no repro.
"Eventually we realised they had an eye toy plugged in, and set to record audio (that took 2 days of iterating) still no joy.
"Finally we noticed the crash was always around 4am. Why? What happened only in Japan at 4am? We begged to find out.
"Eventually the answer came: cleaners arrived. They were more thorough than our cleaners! One hour of vacuuming near the eye toy- white noise- caused the in game chat audio compression to leak a few bytes of memory (only with white noise). Long enough? Crash.
"Our final repro: radios tuned to noise, turned up, and we could reliably crash the game. Fix took 5 minutes after that. Oh, gamedev...."5 -
My team handles infrastructure deployment and automation in the cloud for our company, so we don't exactly develop applications ourselves, but we're responsible for building deployment pipelines, provisioning cloud resources, automating their deployments, etc.
I've ranted about this before, but it fits the weekly rant so I'll do it again.
Someone deployed an autoscaling application into our production AWS account, but they set the maximum instance count to 300. The account limit was less than that. So, of course, their application gets stuck and starts scaling out infinitely. Two hundred new servers spun up in an hour before hitting the limit and then throwing errors all over the place. They send me a ticket and I login to AWS to investigate. Not only have they broken their own application, but they've also made it impossible to deploy anything else into prod. Every other autoscaling group is now unable to scale out at all. We had to submit an emergency limit increase request to AWS, spent thousands of dollars on those stupidly-large instances, and yelled at the dev team responsible. Two weeks later, THEY INCREASED THE MAX COUNT TO 500 AND IT HAPPENED AGAIN!
And the whole thing happened because a database filled up the hard drive, so it would spin up a new server, whose hard drive would be full already and thus spin up a new server, and so on into infinity.
Thats probably the only WTF moment that resulted in me actually saying "WTF?!" out loud to the person responsible, but I've had others. One dev team had their code logging to a location they couldn't access, so we got daily requests for two weeks to download and email log files to them. Another dev team refused to believe their server was crashing due to their bad code even after we showed them the logs that demonstrated their application had a massive memory leak. Another team arbitrarily decided that they were going to deploy their code at 4 AM on a Saturday and they wanted a member of my team to be available in case something went wrong. We aren't 24/7 support. We aren't even weekend support. Or any support, technically. Another team told us we had one day to do three weeks' worth of work to deploy their application because they had set a hard deadline and then didn't tell us about it until the day before. We gave them a flat "No" for that request.
I could probably keep going, but you get the gist of it.4 -
The time my Java EE technology stack disappointed me most was when I noticed some embarrassing OutOfMemoryError in the log of a server which was already in production. When I analyzed the garbage collector logs I got really scared seeing the heap usage was constantly increasing. After some days of debugging I discovered that the terrible memory leak was caused by a bug inside one of the Java EE core libraries (Jersey Client), while parsing a stupid XML response. The library was shipped with the application server, so it couldn't be replaced (unless installing a different server). I rewrote my code using the Restlet Client API and the memory leak disapperead. What a terrible week!
2 -
I have just concluded a post-mortem on one of my servers.
Cause of death: out of memory due to a tiny memory leak in a VPN service triggered by 66 different IPs brute-forcing the creds at the same time. Mostly from China, of course.
Dear bot writers: you made me put aside my spaghetti and write iptables rules. I hate iptables. And I love spaghetti. You should be ashamed of yourself! Did momma not teach you basic OpSec? Don't crash the target and never, ever, interrupt the sysadmin during dinner!6 -
Application has had a suspected memory leak for years. Tech team got developers THE EXACT CODE that caused it. Few months of testing go by, telling us they're resolving their memory leak problem (finally).
Today: yeah, we still need restarts because we don't know if this new deployment will fix our memory leak, we don't know what the problem is.
WHAT THE FUCK WERE YOU DOING IN THE LOWER REGIONS FOR THREE FUCKING MONTHS?!?!?! HAVING A FUCKING ORGY???????????????
My friends took the time to find your damn problem for you AND YOU'RE GOING TO TELL ME YOU DON'T KNOW WHAT THE PROBLEM IS???
It was in lower regions for 3 MONTHS and you don't know how it's impacting memory usage?!?!?! DO YOU WANT TO STILL HAVE A JOB? BECAUSE IF NOT, I CAN TAKE CARE OF THAT FOR YOU. YOU DON'T DESERVE YOUR FUCKING JOB IF YOU CAN'T FUCKING FIX THIS.
Every time your app crashes, even though I don't need to get your highest level boss on anymore for approval to restart your server, I'M GOING TO FUCKING CALL HIM AND MAKE HIM SEE THAT YOU'RE A FUCKING IDIOT. Eventually, he'll get so annoyed with me, your shit will be fixed. AND I WON'T HAVE TO DEAL WITH YOUR USELESS ASS ANYMORE.
(Rant directed at project manager more than dev. Don't know which is to blame, so blaming PM)28 -
Me and my girlfriend's pillow talk about memory leaks
Me: **... So garbage collection is a means to stopping a memory leak from occuring
Gf: what 's a memory leak ?
Me: a memory leak is like when you want a pizza, and the guy gives you pizza. But you don't eat the pizza and you ask for another pizza. You keep doing this repeatedly. Until the pizza guy realizes what you're doing and decides to kill you. He then takes back all his pizzas
Gf: why would you do that though?
Me: Lazy ass programmers who don't clean up after themselves.6 -
Woohoo! I fixed a huge memory leak in our app! ... In one class.
Time for noise cancelling head phones, 80s hacker music, tons of caffeine, and more leak hunting. :)3 -
Ooof.
In a meeting with my client today, about issues with their staging and production environments.
They pull in the lead dev working on the project. He's a 🤡 who freelanced for my previous company where I was CTO.
I fired him for being plain bad.
Today he doesn't recognize me and proceeds to patronize me in server administration...
The same 🤡 that checks production secrets into git, builds projects directly in the production vm.
Buckle up... Deploys *both* staging and production to the *same* vm...
Doesn't even assign a static IP to the VM and is puzzled when its IP has changed after a relaunch...
Stores long term aws credentials instead of using instance roles.
Claims there are "memory leaks", in a js project. (There may be memory misuse by project or its dependencies, an actual memory leak in v8 that somehow only he finds...? Don't think so.)
Didn't even set up pm2 in systemd so his services didn't even relaunch after a reboot...
You know, I'm keeping my mouth shut and make the clown work all weekend to fix his own hubris.9 -
My brother is just like f*cked up program:
Fortnite > Movies > TV Series > Fortnite > Movies > TV Series > F...
Yes, infinite loop and memory leak at its' best.8 -
Finding a memory leak is the very definition of the journey where you start with "I hate everything" and end up with "I am GOD"3
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!rant, but you're my friends and I want to share my day...
We've had a problem open since last March (before I started), but our teams identified the issue with the customer's code 2 years ago. No one made progress on it until I took it over. The newest version deployed 3 months ago and has no memory leak. I closed out oldest problem today.
On a personal note, I got quotes for my dj and photographer for my wedding next month, and the price for both is what I would've been willing to pay for one. My wedding was supposed to be very inexpensive, with these and my bartender being the most expensive parts, but due to unfortunate events, my wedding is 4x the cost (have to use a venue, backyard unavailable, which changes ALL my plans).4 -
Dev: Hi Guys, we've noticed on crashlytics that one of your screens has a small crash. Can you look?
Me: Ok we had a look, and it looks to us to be a memory leak issue on most of the other screens. Homepage, Search, Product page etc. all seem to have sizeable memory leaks. We have a few crashes on our screens saying iPhone 11's (which have 4gb of ram) are crashing with only 1% of ram left.
What we think is happening is that we have weak references to avoid circular dependencies. Our weak references are most likely the only things the system would be able to free up, resulting in our UI not being able to contact the controller, breaking everything. Because of the custom libraries you built that we have to use, we can't really catch this.
Theres not really a lot we can do. We are following apples recommendations to avoid circular dependencies and memory leaks. The instruments say our screens are behaving fine. I think you guys will have to fix the leaks. Sorry.
Dev 1: hhhmm, what if you create a circular dependency? Then the UI won't loose any of the data.
Dev 2: Have you tried looking at our analytics to understand how the user is getting to your screens?
=================================
I've been sitting here for 15 minutes trying to figure out how to respond before they come online. I am fucking horrified by those responses to "every one of your screens have memory leaks"2 -
Achievement unlocked: malloc failed
😨
(The system wasn't out of memory, I was just an idiot and allocated size*sizeof(int) to an int**)
I'd like to thank myself for this delightful exercise in debugging, the GNU debugger, Julian Seward and the rest of the valgrind team for providing the necessary tools.
But most of all, I'd like that three hours of my life back 😩4 -
Boss: Any idea why ColleagueX's code might be blowing out the memory?
Me (internal): Cos he's a fucking retard who can't code for shit, doesn't listen when I tell him to do stuff properly because he's fucking lazy, has no idea what stack and heap are, uses goto everywhere, doesn't know how to debug, doesn't write any unit tests, and generally WASTES MY FUCKING TIME!
Me (external): Probably a memory leak. I'll take a look.2 -
Had nothing to do today, so I thought I´ll test the migration of SVN to Git in Gitlab.
Boss sent me a mail today, that when I migrate we need to preserve the history, so I actually have to put some effort in it. *sigh*
Shout-out to the Gitlab documentation at this point.
That´s probably the best doc I´v ever read...
Well so I tried to use svn2git. And well...
Who the fuck thought that this piece of shit software is in any way usable?
Holy crap!
If it fails, it just does so without any info why. Even in verbose mode.
And the RAM usage? What the actual fuck?
This whole thing is a complete memory leak!
32Gigs of RAM full in Minutes and the whole system starts to stall!
And then when I thought it finally runs through.
Bam another git checkout error...
Googling for that error then I found something. A version of svn2git made in .Net Core.
Didn´t expect much but I tried it anyways.
And would you look at that!
It ran so smooth and didn´t need that much RAM , I had some doubt it did work correctly.
But it did!
I think I´m gonna pay a coffee or two to some guy over in China now!6 -
I would love to see those that say:
Unused RAM is wasted RAM
There you go, used every fucking possible bit to a point mouse pointer doesn't fucking move.
Fucking hate when people say that, and don't be funny and throw a comment about those 300MB are wasted .. blah blah blah.... Yaaaa fuck off.
24 -
- Let's write some code to check for memory leaks
- Oh shit, memory is leaking like crazy
- In fact the program crashes within 10 minutes
*Some hours of debugging and not finding the cause later*
- Starts thinking about the worse
- Hell yeah, the memory leak is caused by the code that checks for memory leaks. But fucking how
- Finds out the leak is caused by the implementation of the std C lib
- In the fucking printf() function
- Proceeds to cry5 -
God damn it lastpass, how the hell do you get a memory leak and an infinite loop in a fucking browser extension?! Using 7GB of RAM and all 8 cores @ 3,4GHz!!9
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Why are people complaining about debugging?
Oooh it’s so hard.
It’s so boring.
Can someone do this for me?
I honestly enjoy debugging and you should too..
if it’s not your code, you’ll get to understand the code better than the actual author. You’ll notice design improvements and that some of the code is not even needed. YOU LEARN!
If it’s your own code (I especially enjoy debugging my own code): it forces you to look at the problem from a different perspective. It makes you aware of potential other bugs your current solution might cause. Again, it makes you aware of flaws in the design. YOU LEARN!
And in either case, if it’s a tricky case, you’ll most likely stop debugging at some point, refactor the shit out of some 50-100 line methods and modulize it because the original code was undebuggable (<- made up a new word there) and continue debugging after that.
So many things I know, I know only because I spend days, sometimes even weeks debugging a piece code to find the fucking problem.
My main language is java and i wouldn’t have believed anyone who told me there’s a memory leak in my code. I mean, it’s java, right? We refactored the code and everything worked fine again. But I debugged the old version anyway and found bugs in Java (java 6.xx I believe?) which made me aware of the fact that languages have flaws as well.. GC has its flaws as well. So does docker and any other software..
Stop complaining, get on your ass and debug the shit out of your bugs instead of just writing it in a different way and being glad that it fixed the issue..
My opinion.3 -
When you thought web browsers use too much memory, introducing a document scanning app that uses only 2,7 GB of ram.
Just a slight memory leak.
5 -
imagine having kernel memory leaks in 2020
AT&T or Huawei, whichever, pushed an update for my already-struggling-to-exist phone that made the kernel memory leak go from 480KB/hr avg to 22.5MB/hr avg. When my free RAM is never under 50% of 2GB after the kernel starts loading other shit and i'm able to express free RAM, at any time in use, in megs, with 8 bits... this means my phone crashes, with no apps running aside from a trimmed list of stock apps, every 3-4 hours due to running out of RAM. The only usable (read: not R/O because unrooted) swapfile is located on a tmpfs, so it's completely fucking useless (and eats another 100MB of RAM that I could be using for LITERALLY anything else, that's like another 3 hours of full idle between crashes) and I can't unlock the bootloader to fix any of this as Huawei no longer hands out keys and it'd take 7 years or so to brute (32-bit @ 10/sec)
tl;dr: fuck15 -
Please bug test your websites heavily. Don't be like this.
Should be mentioned, under normal circumstances this never hits more than 500 MB (still way too much for what it is). However, I somehow got the website to absolutely shit itself and cause this amazing sight to behold (2.6GB/4GB used by the website alone.)
I believe this was caused by some poorly coded JavaScript, subsequently causing a memory leak.
(Yeah I have 2 browsers open so what?)
(Also taken with a shitty camera then also edited. Lost the original because I'm an idiot.)
8 -
So I'm making a file uploader for a buddy of mine and I got an error that I had never seen before. Suddenly I had C++ code and some other weird shite in my terminal. Turns our that I got a memory leak and the first thing that sprung to mind was "Fuck yes, I get to do some NCIS ass debugging".
Now the app worked fine for smaller files, like 5MB - 10MB files, but when I tried with some Linux ISO's it would produce the memory leak.
Well I opened the app with --inspect and set some breakpoints and after setting some breakpoints I found it. Now, for this app I needed to do some things if the user uploads an already existing file. Now to do that I decided to take the SHA string of the file and store it in a database. To do this I used fs.readFile aaaaaaaaaand this is where it went wrong. fs.readFile doesn't read the file as a stream.
Well when I found that, boy did I feel stupid :v
5 -
Latest Atom with Electron 1.6 seems to be pegging multiple CPUs and maxing out ram and swap. Looks like I should start trying different editors again. :(
12 -
Here for you, just so you cant sleep this night:
while (true) {
new long;
cout<<"Deal with it, motherfucker ";
}7 -
Most memorable co-worker was a daft idiot.
this was 10 years ago - I was working as a junior in my very first job, fresh out of uni, for a very small startup. It was me, and the 3 founders, for a very long time. Then this old (45, from my perspective then..) dev was hired.
This guy had no idea how to do the job. no common sense. the code confused him. the founders confused him. I was focusing on my work - and was unable to help him much with his. His only saving grace? He was a nice guy. Really nice.
But why was he so memorable, out of all the people I ever worked with? simple. He had a short term memory problem. Could not, even if he really tried, remember what he did yesterday.... when I asked him what his issue was, he decribed his life is like a car going in reverse in a heavy fog. "I can only see a short distance backwards, with no idea where I'm going".
Startup was sold to a big company. I became a teamlead/architect. He? someone decided he should be a PM. -
When I was in college I was working on a game in Java using Slick2D. My folks were away on holiday so I had the ability to drink in the house (I was over 18). I worked on this coursework piece whilst drinking.
The next morning I went into college with my work and found that it had a massive memory leak that was included by the work that I’d done whilst under the influence.
The issue was fixed (quite easily tbh) but everyone in my class reminded me for the rest of the year...5 -
!rant
I just stumbled upon a first game I ever programmed back in highschool. Oh the nostalgia and the urge to cringe. Apparently I thought programing a game in visual basic and leaving an enormus memory leak was a good idea. Well I guess you have to start somewhere.3 -
Fucking your fucking module allocates fucking memory fucking deallocate the fucking memory in your fucking module.
Don't fucking bullshit me!11 -
Fucking hate Qt.
Spent all morning trying to figure out how their bullshit QThreadPool works with their bullshit QRunnable but after a bunch of bullshit asynchronous testing I figured that my thread object was being collected and deleted before I was done with it, for no reason. Now if the race condition was documented... This wouldn't be an issue. But every google search brought up nada. Eventually I resorted to turning off autoDelete on the runnable, but then I just have a memory leak, obviously.
I couldn't find a way to manually clean up a QRunnable in Python. What the fuck.
I just went back to good old fashioned QThreads... This is why I quit Qt in the first place.18 -
Fuck you react native and your stupid memory leak on dev machine! You are even worse than chrome 🤦🏼♂️
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Okay, friends. I have a challenge. Who can make the sneakiest memory leak example? I need to stump a class of students with something only valgrind can find and I'm having a hard time.5
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Have to find a memory leak in a huge, legacy JS application that builds, renders and handles (most) of the basic logic for completing forms - that only works when compiled into a minified js and put in another application that builds into a phonegap based app.
Did I mention everything is bound to a G(lobal) namespace and the ViewModel/Controllers etc. all use JQuery and "this" references and .bind() everywhere?
Deadline of fix: end of today/early tomorrow.7 -
Sooooo I learn c. Programmed antivirus project last night, and there is 13, 374 bytes of memory leak. (BTW the program crashes at return 0). *Rage and despair*
4 -
When life gives you class, make as much objects as possible so that there is a memory leak in the system...2
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fuck oracle. fuck my company.
Using Oracle VM Manager/Servers to host Oracle Phone transfer solution without support coverage from Oracle.
Requiring Unix sysadmins to update to latest release and not telling that we do not have coverage from Oracle if anything goes wrong.
Gues what.. We've updated to Oracle VM Manager/Server 3.4.5 which was released this year and it uses fucking XEN hypervisor version 4.4.4 which has been deprecated and dead since who knows when. Latest release of XEN is 4.11. But that is not an issue, whatever, enterprise, legacy software, etc.
This fucking update introduced memory leak on the hypervisor which has been reported as per xen 4.4.4 history. Furthermore, we have no support from Oracle which means that I have to dig through mailing lists and limited information on the net since oracle has freakin support wall on nearly each of the major bugs found on that shitty software.
I have no idea whether any newer version of xen will work with that old Oracle Linux kernel or not.
Furthermore, Oracle provided great documentation on how to rollback the fcking update. Reinstall the hypervisor. Riiiight. XEN does not have export/import feature.
eh1 -
Valgrind is awesome. Today I fixed a lot of memory leakage / overflow bugs thanks to it. An guess what? Now, everything works!
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2nd part to https://devrant.com/rants/1986137/...
The story goes on...
After I found more bugs that seem to be related to the communication break, and took a closer look, I sent detailed logs of my research and today we had a conference call.
"We have 2,5 million user, our system is widely-used and there is no plan to change it" they said.
And "We cannot reproduce the issue, but even if there is one, you will have to work around the problem, because we cannot make changes on our side" was one answer
As well as "If we would make changes, we will have to re-certify everything"
So I said we told 'em about the issue to let them improve their system. And I can work around it, I already figured out a solution for my side, but if there is a bug, they'd better fix it for future releases.
And with my additional research I have a bad vibe of some kind of memory leak involved on their "certified" implementation, and that could trigger various other problems.
But it is as always, if I try to be nice, I just get kicked in the ass. I should really be more of an asshole. -
This is embarrassing, but the first days of learning about AngularJS I had to implement functionality about a new component of the WebApp I was building.
I did a good templating, I build the component along with its controller and services, I verified there wasn’t any memory leak and that everything was in an isolated scope. Yet nothing at all appeared on the app. It took me more than 30 minutes until I realized...
I didn’t put the source code on the index.html file 😅
For people who know more about compiled languages such as C or Java... that’s like not putting your source code file in the makefile. 😅
I felt literally like the dumbest person in the planet at that moment. 😀🔫1 -
Worked 2 weeks on hunting a memory leak on a product.
Ended up writing object tracker to find the leak(ironically it was in garbage collector). Found the leak and fixed it. It sounds cool but what I pushed was 9 lines commented out 1 line added for 2 weeks work..
Doesn’t feel very fulfilling to work for 2 weeks to comment out few lines. Only silver lining is that I might turn my object tracker into a library for colleagues to use.
P.s: not a linux or windows environment so tools like walgrind aren’t available.2 -
Not really coding, but debugging complex problems. I love it when I have to dive in head-first and dig (very) deep to find answers to super-complex problems. I once went into the internals of a programming language to understand why a library was acting up in a particular scenario. Another time I had to optimize and re-compile from source (after modifying it) so that the application would not leak its memory. (Of course, I contributed it back to the language).
The inner satisfaction that you get after all that hard-work when it finally works, pays off! Bliss!1 -
So uuuuh. Launching PHPStorm AND Chrome AND VLC causes a Gnome-Shell memory leak. And it takes 2 reboots to cool it down.3
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Thank you, company forced windows update! My 60 minutes reconfiguring rabbitmq and postgres were well invested instead of investigating the memory leak fucking hibernate causes.
I'm done. -
Optionsbleed - HTTP OPTIONS method can leak Apache's server memory
https://blog.fuzzing-project.org/60... -
> somehow decides to fix two bugs at 3 a.m, since they looked simple enough
> fixes bugs
> also causes a memory leak in the same JS script
> next morning the app compiled but kept crashing (duh)
> obviously cant remember what happened
> hangover doesnt let me think, i.e forgets to check the Local History in the IDE
> spends an extra 2 hours. -
Actually kinda sad, that there is no pure rust ui framework out there, but rather mere adaptations of c/c++ frameworks for rust. It's better than nothing for sure, it just would be nice, if i could use a framework, that doesn't create a massive memory leak, because i looked at it funny.
In particular i'm using fltk-rs, and everytime I'm applying a font to some widget, 500kb get added as leaked memory. Doesn't sound like a lot, but for one it's a dynamically built application, so the order and amount of widgets changes, and this application is supposed to run days, if not weeks.
thanks to heaptrack i was able to pinpoint that to libpango, which i'm not even interacting with directly, but rather indirectly through the api.
Annoying, that i chose to use a language for actively preventing leaks and dangling pointers and stuff, but end up leaking memory because of a dependency somewhere.7 -
Production goes down because there's a memory leak due to scale.
When you say it in one sentence, it sounds too easy. Being developers we know how it all goes. It starts with an alert ping, then one server instance goes down, then the next. First you start debugging from your code, then the application servers, then the web servers and by that time, you're already on the tips of your toes. Then you realize that the application and application servers have been gradually losing memory over a period of time. If the application is one that don't get re-deployed ever so often, the complexity grows faster. No anomaly / change detection monitor can detect a gradual decrease of memory over a period of months.2 -
Friend asked him if I could test his program.
I help him test his program and found a memory leak.
He investigated the issue...
After a few hours, he found out that his garbage collector had a memory leak :^)6 -
When windows forms required me to dispose of a certain control derivative manually using a .dispose() call because dynamic control creation was causing a memory leak in dotnet, which instead of fixing, microsoft documented, vaguely.3
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My first cpp project takes 148GB ram. My mentor says it's okay till 50GB. God help me optimise this thing. I have started doubting everything. Int I = 0 also looks suspicious.9
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Me: "I think I'd like to try out the new Ubuntu version. I really liked Gnome before, maybe the OS is better now?"
A couple days later...
"Man, it's really nice not having to emulate bash. I'm so much more productive now with Linux tooling! Wait, why did everything freeze?"
A week after install...
"What do you mean 'I need to recompile wireless adapter drivers'? Why isn't that included or updated through 'apt'!? Who's the person sitting at their desk saying 'yup, that's a reasonable solution?'"
Two weeks after install...
Me: "Oh, so it's not Chrome eating up system resources, there's a memory leak in gnome-shell.... WHAT!? WHY!? How do I switch back to Unity?"
One month after install...
Me: "Yeah, so I tried it out, but then I threw my computer in a river and I'm *so much* better off now."3 -
Having my first memory leak problem ever. This sucks. I've tried what seems like everything. Forcing garbage collection every time I press a key to try and debug the issue. Fuck. I have 'using' blocks everywhere, and I have no idea what I'm doing wrong.3
-
So I recently finished a rewrite of a website that processes donations for nonprofits. Once it was complete, I would migrate all the data from the old system to the new system. This involved iterating through every transaction in the database and making a cURL request to the new system's API. A rough calculation yielded 16 hours of migration time.
The first hour or two of the migration (where it was creating users) was fine, no issues. But once it got to the transaction part, the API server would start using more and more RAM. Eventually (30 minutes), it would start doing OOMs and the such. For a while, I just assumed the issue was a lack of RAM so I upgraded the server to 16 GB of RAM.
Running the script again, it would approach the 7 GiB mark and be maxing out all 8 CPUs. At this point, I assumed there was a memory leak somewhere and the garbage collector was doing it's best to free up anything it could find. I scanned my code time and time again, but there was no place I was storing any strong references to anything!
At this point, I just sort of gave up. Every 30 minutes, I would restart the server to fix the RAM and CPU issue. And all was fine. But then there was this one time where I tried to kill it, but I go the error: "fork failed: resource temporarily unavailable". Up until this point, I believed this was simply a lack of memory...but none of my SWAP was in use! And I had 4 GiB of cached stuff!
Now this made me really confused. So I did one search on the Internet and apparently this can be caused by many things: a lack of file descriptors or even too many threads. So I did some digging, and apparently my app was using over 31 thousands threads!!!!! WTF!
I did some more digging, and as it turns out, I never called close() on my network objects. Thus leaving ~30 new "worker" threads per iteration of the migration script. Thanks Java, if only finalize() was utilized properly.1 -
Why somebody would think that allocate huge amount of objects in the static memory make any sense?? Why??? You need to allocate a bloody database context and all the allocation of your IOC containers and keep increasing!!!
-
After brute forced access to her hardware I spotted huge memory leak spreading on my key logger I just installed. She couldn’t resist right after my data reached her database so I inserted it once more to duplicate her primary key, she instantly locked my transaction and screamed so loud that all neighborhood was broadcasted with a message that exception is being raised. Right after she grabbed back of my stick just to push my exploit harder to it’s limits and make sure all stack trace is being logged into her security kernel log.
Fortunately my spyware was obfuscated and my metadata was hidden so despite she wanted to copy my code into her newly established kernel and clone it into new deadly weapon all my data went into temporary file I could flush right after my stick was unloaded.
Right after deeply scanning her localhost I removed my stick from her desktop and left the building, she was left alone again, loudly complaining about her security hole being exploited.
My work was done and I was preparing to break into another corporate security system.
- penetration tester diaries2 -
I'm so sick of stupid little bugs. Not proper bugs like, I don't know, a memory leak or something significantly wrong, it's always a bloody semi colon or backtick...
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Linux.
Guys, I need some inspiration. How are you dealing with memory leaks, i. .e identifying which component of the system is leaking memory?
Regular method of dumping ps aux sorted by virtual memory usage is not working as all the processes are using the same amount of memory all the time. This is XEN dom0 memory leak, and I have no more ideas what to do.
Is it possible that guests could be eating the dom0 memory?15 -
When C devoper creates a memory leak standard practice valgrind time.
When a webdeveloper creates a memory leak is the day they start to learn javascript. -
That realization that you have a memory leak that invalidates all of your previous performance testing1
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Back in game dev final year, working on GameCube kits, I encountered a weird rendering bug: half the screen was junk.
I was following the professors work and was bewildered that mine was broken.
The order of the class (c++) was different...
I think there was a huge leak somewhere and the order of the class meant memory was leaking into VRAM. I never had the chance to bug hunt to the core of it... Took a while to realise it was that...
It opened my eyes to respect memory haha.2 -
Memory debugging iOS probably makes me more anxious and stressed out than anything. I have put 11
hours into attempting to figure out this crash, but still no progress. It's like I can feel management breathing down my neck to get it done asap. You ever get so stressed out while trying to figure something out at work?3 -
Thought I would help the webdev find a memory leak so step one build a developer version of chromium. Problem one ncurses and libtinfo 😅 got to love the split! Problem two gpg keys on old nucurses compat libs 😅. Linux is not for the faint hearted 😎
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reading the project's code, following "save" callback in jvascript, i find this comment "IMPORTANT : this is a workaround to solve memory leak" and below it code that basically removes all elements from th DOM and adds them again.
so basically, someone could not find a cause to a memory leak and decided "solve it" in a specific place by reloading almost an entire page -
They tried to mark him, they even tried compacting him and his children, but this old generation instance is not going down without a fight. He’s in a big heap of trouble, and he’s running out of time. You better count your references, because this summer’s stop-the-world event will have you staying at work all night: Memory Leak: Production is in your code NOW
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One of the MS libraries for directory services has a known memory leak and there is an easy fix for it but rather than fix it, our systems architect decided it was best to just restart the app pool nightly for one of his apps.
I don't get lazy coding. My apps that use the same MS library don't suffer from that problem all because I spend a little time on the code... -
Completely fed up today, trying to investigate a memory leak using google chromes profiling tools, first of all all the "documentation" is well out of date so you have to pretty much guess your way through it.
Anyway i start to investigate and it looks like the JS Heap increases in size only after a garbage collection, surely this is the wrong way round or am i just being stupid
2 -
[Rust] What are alternatives to argument drilling for something like a string interner which is technically a memory leak so it really shouldn't be global but at the same time all but a couple top level functions depend on its existence? I'm aware of context objects and that's all ChatGPT could give me as well, but I'm wondering if there's more to this problem than that.1
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When was the last time you dealt with an evasive memory leak in JavaScript? How complicated was it and how long did it take to resolve?1
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so I spent an entire day tracking a major memory leak (10mb/s!!!). when I find it, it turns out that It's in a deep part of C++ code that I'm not allowed to touch. now I live in fear of just crashong my 16gb machine every time I debug.
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Started developing an interest in programming after creating warcraft 3 maps using the world editor. I still remember those days where I used the gui trigger editor, where I don't even know the difference between local and global variables, preventing memory leaks by using leak check and etc. Creating new skills using triggers was so exciting. Then I discovered JASS, but I didn't really learn or use much about it. Now I'm working in Unity3D and it is awesome!2
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Hi Everyone,
I am working as a jr front end developer and wanted to study more about performance profiling in Chrome and finding memory leaks using Dev tools. I searched online for a while and not able to find a nice place to start with, can anyone help me out with a resource from where I can start the debugging performance using Chrome Dev tools.
It would be very helpful. -
Image implementing angular universal which for it self is quite painful... Timeinvestment 8hours
Testing local 12 hours by the team
.. deploying to Google app engine because we need a nodejs server and we do don't have one yet ... Server crashing 24/7 with random errors most are memory related spend 3 days almost rewriting everything ... trying to find the memory leak
Then when I was about to give up stumble over a GitHub issue where someone is saying something about tiers on app engine.
Me going wtf there are tiers everywhere it just says automatically scaling instances ...
Googling .. setting to highest tier .. app works. Apparently I was in lowest tier which only has 156 MB ram app needs 150- 250 MB. Me now crying in corner about my wasted 4 days. -
Spend like 3 weeks in mem-checking with valgrind and ASAN, because there seemed to be some leaks. So painful and scary. You loose all confidence in your software, the checking tool, your own sanity.
Some spurious result prevailed, could only move it around. Boss could not reproduce the problem on his machine; Ubuntu 18 with GCC 7, mine was Debian 9 with GCC 6, so I tried older Ubuntu with GCC 5. Also no problem.
Fuck it, I'm switching to clang. -
It fucking infuriates me when any iOS app presents the previous view controller instead of dismissing it when going back.
Please don't mess with my ram.
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