I just wanted to say that you are not alone with this problem, I have seen this happen as well. I have an application that downloads an external link once per second 24x7 and on some seldom but random occasion (perhaps 2-3 times per year) it gets stuck in curl_multi_socket_action().
So far I have not been able to catch it in the act since it have happened at times where I have been away and my colleges have simply restarted the service (so as to not have any outage). My problem is that it happens so rare that I cannot just run it with a debugger so my only hope at this point is to catch it in the act and connect a debugger live to it when it happens the next time. You seem to run on Windows and I have zero knowledge if one can attach debuggers or have the equivalent of ltrace/strace on a running application there like you can on Linux. /HH Den tis 8 feb. 2022 kl 08:32 skrev Lilia Boneva via curl-library < curl-library@lists.haxx.se>: > > Hello again and thank you for the help. > Like Mr. Ray Satiro noticed, It seems I was not set google drive link > properly. Now should be OK ( > https://drive.google.com/file/d/1kdMSBS9fZPBW4WoMJ4qgHIeB01h46d4V/view?usp=sharing). > Also thank you for links and winsock info. > > I will try making working code to share (now not so easy because the > secure requests use private data). > I will also try release version (like Mr. Dmitry Karpov suggested) and > other curl versions, because 7.77 for example runs >5 days before infinite > loop (7.81 less than a day) > Thank you for suggesting ideas toward solutionHave a nice day > > > PS1: > by Ray Satiro:"The file you linked to is inaccessible. HTTP/2 will be > harder to debug > > so stay with 1.1 for now. There might be 3rd party Windows sockets > > libraries but since nobody uses them with curl they might cause other > > problems. Keep using winsock. > > > > There is not enough information here to say this is a curl problem. Can > > you show us the code you are using? Do you have a minimal self contained > > example that can be used to reproduce on a public website like > > httpbin.org for example? Please review the documentation for the multi > > interface [1] and multi- prefixed examples [2]. > > > > > > [1]: https://curl.se/libcurl/c/libcurl-multi.html > > [2]: https://curl.se/libcurl/c/example.html > > " > PS2:by Dmitry Karpov"I assume that you made a "Debug" build and ran your > program under MSVC debugger for 20hrs, right? > > Do you see the same problem for the "release" build (or for "debug" build) > when it is not running under MSVC debugger? > > > > I have seen issues with MSVC debugger in the past, so the issue you > observed may be a debugger issue (when it has been running for too long) > rather than curl's one. > > > > I would put some debugging "printf" messages into your app to detect the > infinite loop but run it as the production "release" build not under > MSVC debugger to confirm that it is not a debugger issue. > > > > And if you still see the "infinite loop" issue without running under > debugger, then, as some folks already mentioned , could you please > provide some sample or "skeleton" code like what you are using in your > app to illustrate where the "infinite loop" happens? > > > > Thanks, > > Dmitry Karpov" > -- > Unsubscribe: https://lists.haxx.se/listinfo/curl-library > Etiquette: https://curl.haxx.se/mail/etiquette.html >
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