URLSessionWebSocketTask cause memory leak when it is disconnected

Question

Created Jun ’20

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We use URLSessionWebSocketTask in our app, whenever we call disconnect which triggers cancel method on URLSessionWebSocketTask, it triggers memory leaks. I used memory graph inside Xcode to find the memory leaks.

WebSocket code

I created an example project to show the memory leaks. Please see FB7729600 for details.

I had lab time with Apple developer this morning but we were running out of time. I tried the approach suggested to avoid use self inside addListener, replace it with static property. I still see memory leak.

Any suggestion is welcome!

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Answer 1

Frameworks Engineer OP

Apple

Jun ’20

Hi Yilei,

I went through the Feedback and noticed that you are running this on 17G5035d ?

We have some WebSocket changes that we landed in 17G5045c (13.6 beta 2).

It might also be a fine idea to test this on iOS 14.

Looking at your code once again, and I think capturing weak self should be fine and should not cause a cycle

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Answer 2

yileizheng OP

Jun ’20

Thank you. I will keep eye on this to see if it is fixed on iOS 14. Thanks!

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Answer 3

jnkfong OP

Jul ’20

Hi all, Im receiving the same memory leaks and tried it on both ios 13.6 and 14 betas; the memory leak still persists in both. Is it possible to get a fix on this for ie 13.6.1 or come up with an agreed solution?

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