High CPU usage, log spam (Failed to write attributes)

[simon574]

I have two backup folders synced from my phone as read-only to an NTFS partition mounted in Linux (ntfs-3g).

The log is permanently spammed with error messages like the following excerpt, to the point where it produces >1GB log data per day. This is also because the errors are logged both to systemd journal, as well as /var/lib/rslsync/sync.log

[20161105 12:55:03.981] Update have pieces for file "/d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-28.1.db.crypt12", was: 72, now: 0
[20161105 12:55:03.981] SyncFileEntry: writing file attributes to file "/d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-28.1.db.crypt12", mt:1472256004
[20161105 12:55:03.981] SyncFileEntry: Failed to write attributes for file /d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-28.1.db.crypt12 - 1
[20161105 12:55:03.981] SyncFileEntry: Failed to write attributes for file /d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-28.1.db.crypt12 - 1
[20161105 12:55:03.981] Update have pieces for file "/d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-28.1.db.crypt12", was: 0, now: 72
[20161105 12:55:03.981] JOURNAL[DC36]: comparing file hashes: equal
[20161105 12:55:03.981] JOURNAL[DC36]: detected updated file "Databases/msgstore-2016-08-27.1.db.crypt12". Checking filehash
[20161105 12:55:03.984] Update have pieces for file "/d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-27.1.db.crypt12", was: 0, now: 72
[20161105 12:55:03.984] JOURNAL[DC36]: entry "/d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-27.1.db.crypt12" state: size:2354514 mt:4294967295 t:1478346903 h:BD5025B782081325FFAB240490356EE887FF4120 (new torrent for file)
[20161105 12:55:03.984] Update have pieces for file "/d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-27.1.db.crypt12", was: 72, now: 0
[20161105 12:55:03.984] SyncFileEntry: writing file attributes to file "/d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-27.1.db.crypt12", mt:1472250789
[20161105 12:55:03.984] SyncFileEntry: Failed to write attributes for file /d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-27.1.db.crypt12 - 1
[20161105 12:55:03.984] SyncFileEntry: Failed to write attributes for file /d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-27.1.db.crypt12 - 1
[20161105 12:55:03.984] Update have pieces for file "/d/Stuff/backups/WhatsApp/Databases/msgstore-2016-08-27.1.db.crypt12", was: 0, now: 72
[20161105 12:55:03.984] JOURNAL[DC36]: comparing file hashes: equal

I don't see where the problem is, however, as folders added as read/write do not show the problem, and the underlying file system has permissions 777 for everything. In fact, "touch <somefile>" in the sync folder works without problems, even if I run it as the "rslsync" user.

Any ideas what I could do to resolve the issue?

[Helen]

NTFS does not allow changing files' attributes, that you can see in the log, error 1 = operation not permitted. So Sync just records log and all events. 

Failed to write attributes for file .... - 1

Are your RW shares also located on same partition? 
for RO ones you can enable option "Overwrite any changed files".