https://bugs.kde.org/show_bug.cgi?id=493178
Bug ID: 493178
Summary: SSHFS client hangs when attempting to browse mounted
directory containing hundreds of files
Classification: Applications
Product: kdeconnect
Version: unspecified
Platform: Android
OS: Android 14.x
Status: REPORTED
Severity: normal
Priority: NOR
Component: android-application
Assignee: albertv...@gmail.com
Reporter: smokythebearonthemount...@gmx.com
CC: andrew.g.r.hol...@gmail.com
Target Milestone: ---
SUMMARY
Using the Play Store version 1.32.2 of the kdeconnect Android Client, the sshfs
on the desktop system hang when attempting to remotely browse a sftp-mounted
directory containing 500 photos.
STEPS TO REPRODUCE
1. Place hundreds of photos (or files) in a directory on an Android phone.
2. Configure SFTP file browsing on the phone and on a Linux system.
3. Mount the directory on the Linux system.
4. Attempt to ls or browse the mounted directory.
OBSERVED RESULT
Sshfs hangs on the Linux system. No directory contents are displayed and
further browsing of the Android device is not possible. Ls and Gnome Files
eventually report zero files found; Dolphin hangs indefinitely.
Killing the ssfhs mount with sudo umount -f -l ... succeeds and allows the
Android device to be re-mounted, but the sftp connection will fail again when
attempting to list a directory containing many files.
EXPECTED RESULT
Directories containing many files should be browsable.
SOFTWARE/OS VERSIONS
Phone: kdeconnect version 1.32.2 - Play Store running on Android 14.
Desktop 1: gsconnect 49 running on OpenSUSE 15.6.
Desktop 2: kdeconnect 23.08.5 running on OpenSUSE 15.6.
ADDITIONAL INFORMATION
This behavior can be replicated using both kdeconnect and gsconnect. It appears
to be an issue with the Android component of kdeconnect. I speculate that
androidx.documentfile.provider.DocumentFile (which is notoriously slow; see
[1]) does not enumerate the directory contents fast enough and the sftp
connection stalls indefinitely. Reworking the sftp plugin to use some of the
alternatives suggested in [1] may correct this problem.
[1]
https://stackoverflow.com/questions/42186820/why-is-documentfile-so-slow-and-what-should-i-use-instead
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