FileSystemException: Cannot open file, OS Error: No such file or directory, errno = 2 was thrown

[Pandian-Natarajan]

🐛 Bug Report

In my app, Im having a ListView which shows the users like in contacts app, sometimes its throws FileSystemException: Cannot open file.

════════ Exception caught by image resource service ════════
The following FileSystemException was thrown resolving an image codec:

Cannot open file, path = '/var/mobile/Containers/Data/Application/
B861D1-3A04-498D-AC67-23E00574DD1C/Library/Caches/
libCachedImageData/fdbf1150-a040-11ea-d6f9-4168d77.bin' 
(OS Error: No such file or directory, errno = 2)

When the exception was thrown, this was the stack
#0 _File.open. (dart:io/file_impl.dart:366:9)
(elided 13 frames from dart:async)
Path: /var/mobile/Containers/Data/Application/B861D1-3A04-498D-AC67-23E00574DD1C/Library/Caches/libCachedImageData/fdbf1150-a040-11ea-d6f9-4168d77.bin

Code

ListTile(
      leading: CachedNetworkImage(
          fadeInDuration: Duration(milliseconds: 100),
          fit: BoxFit.cover,
          imageUrl: _filteredUser[index].photoUrl,
          progressIndicatorBuilder: (context, url, downloadProgress) =>
              shimmerImageTile(),
          errorWidget: (context, url, error) => _imagePlaceHolder(),
        ),
    title: userName(),
),

Configuration

Version:
cached_network_image: ^2.2.0

Platform:

• [ 🟢] 📱 iOS
• [ 🟢] 🤖 Android

[fryette]

Same issue if the URL is empty('').
Maybe better to show error placeholder instead of trying to load it?

[Pandian-Natarajan]

Hi @fryette thanks for your response but Im handling the empty url already and I think this is problem with caching im not sure.

[Soon96]

ya, having same problem... any solution for now?

[renefloor]

You can find more on this issue here: Baseflow/flutter_cache_manager#135 (comment)

[Soon96]

hi sorry for rushing, any status update or solution? now, the images of my app keep disappearing due to the error....

[renefloor]

@Soon96 No sorry, maybe you can help in finding the real problem and solution.
When do the images disappear mostly? Do you load a lot of images, or older images? Do you have any idea how to reproduce this issue?

[Soon96]

When do the images disappear mostly?
usually happen in listview, when scroll down the list then scroll up again... some image will missing.
Do you load a lot of images, or older images?
Quite a number of products images...
Do you have any idea how to reproduce this issue?
maybe you can test in a list view, scroll up and down....

Error Msg in Debug Console:

I/flutter (27834): Another exception was thrown: FileSystemException: Cannot open file, path = '/data/user/0/ ... /cache/libCachedImageData/ef136f60-aa2d-11ea-ab9b-1d7b0e7aa781.html' (OS Error: No such file or directory, errno = 2)

I/flutter (27834): Another exception was thrown: FileSystemException: Cannot open file, path = '/data/user/0/ ... /cache/libCachedImageData/ef1432b0-aa2d-11ea-c584-d30ca5b9f1c2.html' (OS Error: No such file or directory, errno = 2)

Error video in app:
https://www.goldensticks.blog/assets/error_video.mp4

It work perfectly previously, just this few week we start facing this problem.

[Soon96]

@renefloor is it flutter list view deleting our cache files?

[renefloor]

The cache manager should only remove files that haven't been used today as given here: https://github.com/Baseflow/flutter_cache_manager/blob/develop/flutter_cache_manager/lib/src/storage/cache_object_provider.dart#L86

So it could be that Android or iOS thinks the cached files are to big and deletes them from the cache.

My guess is that the library handles this better in version 2.3.0-beta.1+1, as there the encoded image is cached in memory and when that is removed from memory the file is downloaded again when the file is removed as well.

But that version has some issues with scrolling if you are on the stable channel. (Fixed in beta and newer)

[Soon96]

thanks for the reply, so for now on we can only wait for the new version stable release or change to other plugin?

[renefloor]

You could also use the beta version, which is often pretty stable.
I also found that there is a 'file.exists()' check missing here: https://github.com/Baseflow/flutter_cache_manager/blob/develop/flutter_cache_manager/lib/src/cache_store.dart#L69, so that could fix part of the problem.

[bradsb]

Using the beta version 2.3.0-beta.1+1 recommended above causes us many of these exceptions

════════ Exception caught by image resource service ════════════════════════════
The following assertion was thrown when reporting an error to an image listener:
setState() called after dispose(): _ImageState#679ff(lifecycle state: defunct, not mounted, stream: ImageStream#85a0f(MultiFrameImageStreamCompleter#5ed5d, [750×1061] @ 1.0x, 1 listener), pixels: null, loadingProgress: null, frameNumber: null, wasSynchronouslyLoaded: false)

This error happens if you call setState() on a State object for a widget that no longer appears in the widget tree (e.g., whose parent widget no longer includes the widget in its build). This error can occur when code calls setState() from a timer or an animation callback.

And then many of the images don't appear. Hope it will become stable soon to fix this FileSystemException

[renefloor]

@bradsb that is a bug in the Flutter code. The fix is currently available in the beta channel. Hopefully it is soon available in stable. It is also the reason 2.3.0-rc has a minimum flutter version of 1.19.0

[bradsb]

@renefloor I see. Thanks for the reply!

[ShannonChenCHN]

@renefloor I have changed the dependency code to develop branch, but still got this file exception. Based on the given stack frame, I found the reason why I got file exception is the very first calling of Uri.base.scheme, so I figured it is a flutter issue.

SDK version:

➜  / flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.12.13+hotfix.5, on Mac OS X 10.15.4 19E287, locale
    zh-Hans-CN)

Exception info: