rsync and cp commands hang #85
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@triszalo First, thanks much for the thorough investigation and documentation. I don't use You identify a specific date (28 Nov) where this process stopped working, but I suspect the data set being synchronized to pCloud changes more frequently than the program itself. What isn't obvious to me is whether your investigation clearly determines that a change in the program caused this problem, or a change in the file set. The only coding activity at that time was an update to CLI. My questions: Is the problem caused by recent changes?
... caused by one or more files?
The best I can do right now is try to reproduce with |
Dear all!
The issue
I was using
pcloudcc(https://github.com/pcloudcom/console-client) on my RPi 4 for creating automatic backup from the pCloud to a hdd. I have services for doing the job, but the relevant part is, that anrsynccommand is run regularly.One day I found, that the
rsynccommand hangs for unlimited time, without any cpu, disk or network activity.Investigation
During the investigation at an early phase I discovered this project, so I removed the old
pcloudccinstallation and installed this one. I am very happy and thankful, that there is an AUR package for that, so I could install it this simple way:I have
****for the sensitive parts (this time only for the hostname) and sorry for the hungarian language, but you can see, that the only error is, that your package is not available forarmv7h. Fortunately it asks, if I want to build it anyway. I selected yes, the build and installation was successful without any warning.Just in case I removed the old
~/.pcloudfolder before I started the newpcloudcc:I typed the password and everything was ok, the
~/pCloudDrivehas the content.I run the
rsynccommand, already with multiple-vin order to get more debug info:Unfortunately, at some point (after 2-3GB) the
rsynccommand hangs (sensitive data with******):In this example the transfer of the last file (
rokus_szhely-23.jpg) did not begin, but in other cases it just hangs at e.g. 82% of a file.I tried to
ctrl+C, but no prompt is presented.In another terminal we can see, that the one
rsynccommand spawned three processes, and the first one is stuck in the "uninterruptible sleep" state:I tried deleting the last transferred file and rerun the
rsynccommand:We can see, that it transfers the
rokus_szhely-21.jpg, but it has problems withrokus_szhely-22.jpg:If I stop the
pcloudcc, remove the~/.pcloudfolder, start thepcloudccand run thersyncagain, it transfers a new 2-3GB, but it hangs before/during/after a different file. It can be seen clearly, that the previous problematic file is transferred successfully (e.g.rokus_szhely-22.jpg) in this case.If I just restart the
pcloudccand run thersyncagain, it transfers the problematic file and a couple new files (around 10 files), but it hangs afterwards.I tried copying the problematic file with a simple
cp, but it hangs as well.If I remove the
~/.pcloudfolder and try to copy the folder, which I tried to backup with rsync, thecpstarts and looks good, but it hangs after 2.3GB.I have 20GB free space for the root filesystem, so the the
~/.pcloudfolder and thepcloudccprogram should not face disk space issues.The problem is there (in both
rsyncandcpcases with previously removing the~/.pcloudfolder) when the~/.pcloudfolder reaches the size around 2.1GB (in these cases I had 2192464 and 2192368 bytes).Guesses
My guess is, that something gets corrupted in the
~/.pcloudfolder.Other important info is, that my automatic backup was running 2 years without any issue, and suddenly on 2024.11.28. the problem was there (I can see the exact date in the logfiles).
As I remember, around this date me and my colleagues were dropped out from all pcloud clients (mobile, Linux desktop, Windows desktop) and have to login on all platforms again. Maybe pcloud modified something serious, which is not tracked in the
pcloudcc. If this would be the case, that is sad, because I guess we can not get the info from the pcloud support and theirpcloudcc(https://github.com/pcloudcom/console-client) seems abandoned.Does anybod have something similar?
Could you help me resolve this?
I try to avoid reinstalling the whole system, but I can investigate more, if anybody has some guesses or ideas.
Thank you in advance!
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