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SneYellow46's avatar
SneYellow46
Explorer | Level 4
4 years ago

File upload to dropbox timeout/pauses after certain time. Objective c SDK for dropbox.

Hi, We have an iOS objective c app with dropbox sdk integrated. The app uploads large number of photos/files from local app storage to dropbox folder. When we start the upload process it upload...
API
SneYellow46's avatar
SneYellow46
Explorer | Level 4
4 years ago

Greg-DB , we have a system where in we upload almost 100-150 images/files at a time. 

With regards to error message, we sometimes get upload timeout from dropbox and sometimes it just pauses without going to error block.

So not really sure what is causing the issue. dropbox sdk has mentioned in the documentation that iOS wont stop the upload/download process and there is no timeout. 

Greg-DB's avatar
Greg-DB
Icon for Dropbox Community Moderator rankDropbox Community Moderator
4 years ago

Uploading 100-150 files at the same may exhaust the system or network connection, as each one requires its own HTTPS request. I recommend limiting how many you perform simultaneously. You may want to experiment a bit to see what a good limit is for your scenario/environment.

  • SneYellow46's avatar
    SneYellow46
    Explorer | Level 4
    4 years ago

    Hi Greg-DB , I tested the app several times.

    As per my investigation the issue is it goes into error block for few upload requires(out of all) with timeout error when trying to upload so many files in a loop at once.

    Is there any solution provide by Dropbox SDK for this other than limiting the number of files/requests to upload at a time?

    Let me know soon.

    Thanks,

    • Здравко's avatar
      Здравко
      Legendary | Level 20
      4 years ago

      Hi SneYellow46,

      Key moment, when multiple uploads are performing simultaneous, is high probability different uploads to stuck on catching GIL (leading to issues). You can decrease such probability as make upload itself and attach file to the folder tree (only the attach actually needs GIL catch) in 2 different steps, so many uploads can happen simultaneous without risk for conflict and finalization of all files can happen at once. 😉

      Hope this helps.

      • SneYellow46's avatar
        SneYellow46
        Explorer | Level 4
        4 years ago

        Hi Greg-DB , I tried the Batch method before and it still goes to timeout.

         

        Здравко , thanks for the advise but this approach isn't feasible for our scenario.

         

        I guess we need to handle this from our end with our own logic.

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