This might not be your only problem but you have a race condition that could show up if you pause and resume quickly where the definition of quickly varies greatly depending on your circumstances. Consider that you've got 32 threads each requesting a MB chunk, let's call them threads They are sitting their downloading and you pause.
The threads do not know that you paused until they get a chunk of data as they are sitting in blocking io. Not sure what speed your connection is or how many cores your machine has threads will sometimes act in parallel when they don't need the GIL, but this process could take a lot longer than you expect. Then you unpause and your code creates new threads but some or all of threads are still waiting for the next chunk. You set threads in motion and then you turn off your pause flag.
Those threads that didn't end from then wake up and see that things aren't paused. Now you have multiple threads accessing the same state variables. You even reuse the objects that the threads live inside of so that state can get really really messed up. There might be some other problems in your code and it is a lot to sort through so I suggest taking the time to do some refactoring to eliminate duplicate code and organise things into more functions.
I am relatively confident however that your current problem will be solved if you ensure the threads you have running actually end after you pause. To do so you need to actually hold references to your threads.
When you create your threads the first time and after you unpause, or preferably this would be in a function and you'd do it there and return the list :.
This way you have the threads working, they quit when you pause and you rebuild them. This way those threads are always dead before you make the new ones. It is a free, cross-platform alternative to IDM. The app has a simple and intuitive interface and uses a similar kind of multi-threading technology to speed up your downloads. It can resume interrupted downloads due to dropped connections, network problems, and unexpected power outages. Download : Xtreme Download Manager Free.
With high-speed internet connection and almost unlimited data, partial or incomplete downloads aren't a big problem. And if it occurs, Wget lets you easily resume the failed download, even if your internet connectivity is spotty. Wget is a versatile command line utility that can do quite a few things with a single command. Want to archive some web pages to read later on any device? The answer is to convert those websites to PDF with Wget.
With his M. Writing and teaching others is always his passion. He now writes about technology and make it digestible for readers who don't understand it well. Cause for Partial Downloads We cannot entirely blame Chrome for interrupted downloads.
The web server doesn't allow you to resume a download and forces it to start from the beginning. If your internet connection is slow or the server gets overloaded with requests, then a timeout can result in incomplete downloads.
The source file is corrupted. In such a case, you'll experience a partial download no matter which browser you use. Share Share Tweet Email. Rahul Saigal Articles Published. Subscribe to our newsletter Join our newsletter for tech tips, reviews, free ebooks, and exclusive deals! Awesome PC Accessories. Best Linux Laptops. Best Bluetooth Trackers. Best eReaders. Best Gaming Monitors. Best Android Phones.
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Built-in Scheduler. Fast, secure downloads Easy-to-use interface Helps you to prioritize queued downloads Interrupted download resumption Support for pausing and resuming downloads Support for proxy server configuration.
Here, are some situation when you should use download manager: It is helpful when you have multiple people sharing the same connection. Download managers help you to overcome bandwidth controls.
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