Refresh Covers in Library

What is the best way to trigger a refresh of only the covers for my library?

I use YACReaderLibraryServer in a docker container on a Ugreen NAS. I read my comics on an ipad, server is on version 10.0.0, tablet is on version 3.38.0. I recently migrated my library to this server from a Synology NAS.

I can see that all the folder images exist in the .yacreaderlibrary/covers folder, but when I am browsing on my tablet only about 10% of the covers appear while browsing. It is consistently the same covers that appear. I have also tried clearing cache on my ipad and have tried removing the covers folder entirely

My hope would be to regenerate just the cover images

I have run YACReaderLibraryServer update-library /path which ran for about 10 seconds and then reported that it was done. I have about 15,000 comics in my library

Great project, I've been using it for several years now and I'm happy to see you continue to update it. I appreciate the official docker container as well.

Hmmm, if the covers are there there is no reason for recreating them. Do you see any errors in the logs?

I turned on trace level logging, and this is what shows up when I browse a folder where the covers are all blank. I spot checked the folder for the image beed19eaf560b1d996d1628338eb72d3c90635d174353133.jpg and it was not found.

Is it possible the hashing to name the cover has changed from when I first created the library? So the server is looking for cover file names that don't exist? If that was happening, then recreating the cover cache would fix it . . .

I see read timeouts in the log?

My reading history and some metadata edits are in the ydb file, so I would rather not start from scratch to rebuild the library

2026-06-06T22:11:14.474605334Z [migrations] started
2026-06-06T22:11:14.474630578Z [migrations] no migrations found
2026-06-06T22:11:14.629210705Z usermod: no changes
2026-06-06T22:11:14.629270538Z
2026-06-06T22:11:14.629292367Z

---

2026-06-06T22:11:14.629295075Z __ __ _____ _____ _
2026-06-06T22:11:14.629297106Z \ \ / //\ / ____| __ \ | |
2026-06-06T22:11:14.629299192Z \ \_/ // \ | | | |__) |___ __ _ __| | ___ _ __
2026-06-06T22:11:14.629300876Z \ // /\ \| | | _ // _ \/ _` |/ _` |/ _ \ __|
2026-06-06T22:11:14.629302628Z | |/ ____ \ |____| | \ \ __/ (_| | (_| | __/ |
2026-06-06T22:11:14.629304337Z |_/_/ \_\_____|_| \_\___|\__,_|\__,_|\___|_|
2026-06-06T22:11:14.629306058Z
2026-06-06T22:11:14.629307537Z

---

2026-06-06T22:11:14.629309094Z GID/UID
2026-06-06T22:11:14.629310644Z

---

2026-06-06T22:11:14.631371164Z
2026-06-06T22:11:14.631379851Z User uid: 1000
2026-06-06T22:11:14.631382334Z User gid: 10
2026-06-06T22:11:14.631384347Z

---

2026-06-06T22:11:14.631386249Z
2026-06-06T22:11:14.913925965Z [custom-init] No custom files found, skipping...
2026-06-06T22:11:14.960963610Z INFO 2026-06-06T18:11:14.960 YACReaderLibraryServer attempting to start
2026-06-06T22:11:14.961028961Z INFO 2026-06-06T18:11:14.960

---

System & configuration

---

2026-06-06T22:11:14.964938319Z INFO 2026-06-06T18:11:14.964 "SYSTEM INFORMATION"
2026-06-06T22:11:14.964960713Z INFO 2026-06-06T18:11:14.964 "Qt version: 6.4.2"
2026-06-06T22:11:14.964971586Z INFO 2026-06-06T18:11:14.964 "Build ABI: x86_64-little_endian-lp64"
2026-06-06T22:11:14.964987336Z INFO 2026-06-06T18:11:14.964 "build CPU architecture: x86_64"
2026-06-06T22:11:14.964990100Z INFO 2026-06-06T18:11:14.964 "CPU architecture: x86_64"
2026-06-06T22:11:14.964991837Z INFO 2026-06-06T18:11:14.964 "Kernel type: linux"
2026-06-06T22:11:14.964995869Z INFO 2026-06-06T18:11:14.964 "Kernel version: 6.12.30+"
2026-06-06T22:11:14.964997793Z INFO 2026-06-06T18:11:14.964 "Product info: Ubuntu 24.04.4 LTS"
2026-06-06T22:11:14.964999459Z INFO 2026-06-06T18:11:14.964 ""
2026-06-06T22:11:14.965009884Z INFO 2026-06-06T18:11:14.964 "APP INFORMATION"
2026-06-06T22:11:14.965015965Z INFO 2026-06-06T18:11:14.964 "Image formats supported: bmp, cur, gif, icns, ico, jpeg, jpg, mng, pbm, pgm, png, ppm, tga, tif, tiff, wbmp, webp, xbm, xpm"
2026-06-06T22:11:14.965018334Z INFO 2026-06-06T18:11:14.964 "User image plugin folder: /config/.local/share/YACReader/plugins/imageformats"
2026-06-06T22:11:14.965020179Z INFO 2026-06-06T18:11:14.964 "Compression backend: 7zip"
2026-06-06T22:11:14.965021740Z INFO 2026-06-06T18:11:14.964 "PDF support: Poppler"
2026-06-06T22:11:14.965023434Z INFO 2026-06-06T18:11:14.964 ""
2026-06-06T22:11:14.965025090Z INFO 2026-06-06T18:11:14.964 Libraries:
2026-06-06T22:11:14.965026666Z INFO 2026-06-06T18:11:14.964 "Vault [1, 027209b4-2deb-4cd8-a0d9-3da4bf38f845, /comics]"
2026-06-06T22:11:14.967587047Z INFO 2026-06-06T18:11:14.967 > STATUS: "OK"
2026-06-06T22:11:14.967594679Z INFO 2026-06-06T18:11:14.967

---

2026-06-06T22:11:14.967758091Z INFO 2026-06-06T18:11:14.967 YACReaderLibrary starting
2026-06-06T22:11:14.967768216Z DEBUG 2026-06-06T18:11:14.967 StaticFileController: docroot=/app/share/yacreader/server/docroot, encoding=UTF-8, maxAge=60000
2026-06-06T22:11:14.967771069Z DEBUG 2026-06-06T18:11:14.967 StaticFileController: cache timeout=60000, size=1000000
2026-06-06T22:11:14.967772964Z DEBUG 2026-06-06T18:11:14.967 ServiceHelper: Starting service
2026-06-06T22:11:14.968016307Z DEBUG 2026-06-06T18:11:14.967 HttpListener: Listening on port 8080
2026-06-06T22:11:14.968032545Z DEBUG 2026-06-06T18:11:14.967 ServiceHelper: Service has started
2026-06-06T22:11:14.968039680Z INFO 2026-06-06T18:11:14.967 Running on "172.19.0.2:8080"
2026-06-06T22:11:14.968045419Z
2026-06-06T22:11:14.968073941Z INFO 2026-06-06T18:11:14.968 "███████████████████████████████"
2026-06-06T22:11:14.968080461Z INFO 2026-06-06T18:11:14.968 "███████████████████████████████"
2026-06-06T22:11:14.968082222Z INFO 2026-06-06T18:11:14.968 "█████ ▄▄▄▄▄ ██▀ ▀ █ ▄▄▄▄▄ █████"
2026-06-06T22:11:14.968083663Z INFO 2026-06-06T18:11:14.968 "█████ █ █ █▄█ ▀▀█ █ █ █████"
2026-06-06T22:11:14.968085348Z INFO 2026-06-06T18:11:14.968 "█████ █▄▄▄█ █ █▄▄ █ █▄▄▄█ █████"
2026-06-06T22:11:14.968087328Z INFO 2026-06-06T18:11:14.968 "█████▄▄▄▄▄▄▄█▄█▄█▄█▄▄▄▄▄▄▄█████"
2026-06-06T22:11:14.968088755Z INFO 2026-06-06T18:11:14.968 "██████▄▀█▄█▄▀ ▀█▀▀ █ █ ▀▀█████"
2026-06-06T22:11:14.968090558Z INFO 2026-06-06T18:11:14.968 "█████ ▄ ▀▀ ▄▄▄█▄█ █▀▀▀▀█ ▀█████"
2026-06-06T22:11:14.968097238Z INFO 2026-06-06T18:11:14.968 "█████▄█▄▄██▄█ ▄▄ ▄▀█▄ █████"
2026-06-06T22:11:14.968099366Z INFO 2026-06-06T18:11:14.968 "█████ ▄▄▄▄▄ ██▄▄ ████▄ █▀ █████"
2026-06-06T22:11:14.968100783Z INFO 2026-06-06T18:11:14.968 "█████ █ █ █▄▄▄▄▀ ▀ █▀▄▀ █████"
2026-06-06T22:11:14.968102170Z INFO 2026-06-06T18:11:14.968 "█████ █▄▄▄█ █▀ ███▄▄▀▀█▀█████"
2026-06-06T22:11:14.968103596Z INFO 2026-06-06T18:11:14.968 "█████▄▄▄▄▄▄▄█████▄▄▄█▄▄█▄▄█████"
2026-06-06T22:11:14.968104834Z INFO 2026-06-06T18:11:14.968 "███████████████████████████████"
2026-06-06T22:11:14.968106180Z INFO 2026-06-06T18:11:14.968 "███████████████████████████████"
2026-06-06T22:11:14.968157702Z WARN 2026-06-06T18:11:14.968 QSqlDatabasePrivate::addDatabase: duplicate connection name '/comics/.yacreaderlibrary/library.ydb7f2feb168c80', old connection removed.
2026-06-06T22:11:15.930242163Z Connection to localhost (::1) 8080 port [tcp/*] succeeded!
2026-06-06T22:11:15.930379206Z DEBUG 2026-06-06T18:11:15.930 HttpConnectionHandler (0x565295db0900): thread started
2026-06-06T22:11:15.930394183Z DEBUG 2026-06-06T18:11:15.930 HttpConnectionHandler (0x565295db0900): constructed
2026-06-06T22:11:15.930424204Z DEBUG 2026-06-06T18:11:15.930 HttpConnectionHandler (0x565295db0900): handle new connection
2026-06-06T22:11:15.932335589Z DEBUG 2026-06-06T18:11:15.932 HttpConnectionHandler (0x565295db0900): disconnected
2026-06-06T22:11:15.939310068Z [ls.io-init] done.
2026-06-06T22:11:32.806637195Z DEBUG 2026-06-06T18:11:32.806 HttpConnectionHandler (0x565295db0900): handle new connection
2026-06-06T22:11:32.808227529Z DEBUG 2026-06-06T18:11:32.808 HttpRequest: from ::ffff:10.0.0.21: POST /v2/sync HTTP/1.1
2026-06-06T22:11:32.809337678Z DEBUG 2026-06-06T18:11:32.809 HttpConnectionHandler (0x565295db0900): received request
2026-06-06T22:11:32.809346149Z TRACE 2026-06-06T18:11:32.809 RequestMapper: path= /v2/sync
2026-06-06T22:11:32.809351314Z TRACE 2026-06-06T18:11:32.809 X-Request-Id: ""
2026-06-06T22:11:32.809601021Z TRACE 2026-06-06T18:11:32.809 POST DATA: ""
2026-06-06T22:11:32.809757620Z DEBUG 2026-06-06T18:11:32.809 HttpConnectionHandler (0x565295db0900): finished request
2026-06-06T22:11:36.465667854Z DEBUG 2026-06-06T18:11:36.465 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/folder/1040/content HTTP/1.1
2026-06-06T22:11:36.466387929Z DEBUG 2026-06-06T18:11:36.466 HttpConnectionHandler (0x565295db0900): received request
2026-06-06T22:11:36.466409007Z TRACE 2026-06-06T18:11:36.466 RequestMapper: path= /v2/library/1/folder/1040/content
2026-06-06T22:11:36.466411167Z TRACE 2026-06-06T18:11:36.466 X-Request-Id: ""
2026-06-06T22:11:36.480145614Z DEBUG 2026-06-06T18:11:36.479 HttpConnectionHandler (0x565295db0900): finished request
2026-06-06T22:11:36.495851188Z DEBUG 2026-06-06T18:11:36.495 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/comic/45843/fullinfo HTTP/1.1
2026-06-06T22:11:36.496668426Z DEBUG 2026-06-06T18:11:36.496 HttpConnectionHandler (0x565295db0900): received request
2026-06-06T22:11:36.496697667Z TRACE 2026-06-06T18:11:36.496 RequestMapper: path= /v2/library/1/comic/45843/fullinfo
2026-06-06T22:11:36.496704778Z TRACE 2026-06-06T18:11:36.496 X-Request-Id: ""
2026-06-06T22:11:36.497327937Z DEBUG 2026-06-06T18:11:36.497 HttpConnectionHandler (0x565295db0900): finished request
2026-06-06T22:11:36.568140744Z DEBUG 2026-06-06T18:11:36.567 HttpConnectionHandler (0x565295dad760): thread started
2026-06-06T22:11:36.568160446Z DEBUG 2026-06-06T18:11:36.567 HttpConnectionHandler (0x565295dad760): constructed
2026-06-06T22:11:36.568162281Z DEBUG 2026-06-06T18:11:36.567 HttpConnectionHandler (0x565295dad760): handle new connection
2026-06-06T22:11:36.568163661Z DEBUG 2026-06-06T18:11:36.567 HttpConnectionHandler (0x565295dac4c0): thread started
2026-06-06T22:11:36.568164863Z DEBUG 2026-06-06T18:11:36.567 HttpConnectionHandler (0x565295dac4c0): constructed
2026-06-06T22:11:36.568166076Z DEBUG 2026-06-06T18:11:36.567 HttpConnectionHandler (0x565295dac4c0): handle new connection
2026-06-06T22:11:36.568167393Z DEBUG 2026-06-06T18:11:36.568 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/a77fbd5c65ae75899578fa27a5b9d1edb292d1f43631571.jpg HTTP/1.1
2026-06-06T22:11:36.568590147Z DEBUG 2026-06-06T18:11:36.568 HttpConnectionHandler (0x565295dad760): received request
2026-06-06T22:11:36.568600386Z TRACE 2026-06-06T18:11:36.568 RequestMapper: path= /v2/library/1/cover/a77fbd5c65ae75899578fa27a5b9d1edb292d1f43631571.jpg
2026-06-06T22:11:36.568602557Z TRACE 2026-06-06T18:11:36.568 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.568604302Z DEBUG 2026-06-06T18:11:36.568 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/beed19eaf560b1d996d1628338eb72d3c90635d174353133.jpg HTTP/1.1
2026-06-06T22:11:36.568605733Z DEBUG 2026-06-06T18:11:36.568 HttpConnectionHandler (0x565295dac4c0): received request
2026-06-06T22:11:36.568607104Z TRACE 2026-06-06T18:11:36.568 RequestMapper: path= /v2/library/1/cover/beed19eaf560b1d996d1628338eb72d3c90635d174353133.jpg
2026-06-06T22:11:36.568608427Z TRACE 2026-06-06T18:11:36.568 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.568609811Z DEBUG 2026-06-06T18:11:36.568 HttpConnectionHandler (0x565295dbfdd0): thread started
2026-06-06T22:11:36.568611175Z DEBUG 2026-06-06T18:11:36.568 HttpConnectionHandler (0x565295dbfdd0): constructed
2026-06-06T22:11:36.568658174Z DEBUG 2026-06-06T18:11:36.568 HttpConnectionHandler (0x565295dbfdd0): handle new connection
2026-06-06T22:11:36.568660038Z DEBUG 2026-06-06T18:11:36.568 HttpConnectionHandler (0x565295db3290): thread started
2026-06-06T22:11:36.568661342Z DEBUG 2026-06-06T18:11:36.568 HttpConnectionHandler (0x565295db3290): constructed
2026-06-06T22:11:36.568662545Z DEBUG 2026-06-06T18:11:36.568 HttpConnectionHandler (0x565295db3290): handle new connection
2026-06-06T22:11:36.568837065Z DEBUG 2026-06-06T18:11:36.568 HttpConnectionHandler (0x565295dac4c0): finished request
2026-06-06T22:11:36.569059891Z DEBUG 2026-06-06T18:11:36.569 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/4fd86dba45d2d4f81221f9e6e0a4e731f0642ee45397765.jpg HTTP/1.1
2026-06-06T22:11:36.569353496Z DEBUG 2026-06-06T18:11:36.569 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/341bc4710a62425381a457fb3ab6c5312bae36605386161.jpg HTTP/1.1
2026-06-06T22:11:36.569355147Z DEBUG 2026-06-06T18:11:36.569 HttpConnectionHandler (0x565295dad760): finished request
2026-06-06T22:11:36.569376324Z DEBUG 2026-06-06T18:11:36.569 HttpConnectionHandler (0x565295dc1fc0): thread started
2026-06-06T22:11:36.569384096Z DEBUG 2026-06-06T18:11:36.569 HttpConnectionHandler (0x565295dc1fc0): constructed
2026-06-06T22:11:36.569438511Z DEBUG 2026-06-06T18:11:36.569 HttpConnectionHandler (0x565295dc1fc0): handle new connection
2026-06-06T22:11:36.569528816Z DEBUG 2026-06-06T18:11:36.569 HttpConnectionHandler (0x565295dbd230): thread started
2026-06-06T22:11:36.569530586Z DEBUG 2026-06-06T18:11:36.569 HttpConnectionHandler (0x565295dbd230): constructed
2026-06-06T22:11:36.569589249Z DEBUG 2026-06-06T18:11:36.569 HttpConnectionHandler (0x565295dbd230): handle new connection
2026-06-06T22:11:36.570441690Z DEBUG 2026-06-06T18:11:36.570 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/0f709674111aff2ff3d834e4b4fd72a9143fb30f4043640.jpg HTTP/1.1
2026-06-06T22:11:36.570629911Z DEBUG 2026-06-06T18:11:36.570 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/e97392676cbc37af040ca89fa3217588386fdca65515507.jpg HTTP/1.1
2026-06-06T22:11:36.571730011Z DEBUG 2026-06-06T18:11:36.571 HttpConnectionHandler (0x565295dc1fc0): received request
2026-06-06T22:11:36.571735814Z TRACE 2026-06-06T18:11:36.571 RequestMapper: path= /v2/library/1/cover/0f709674111aff2ff3d834e4b4fd72a9143fb30f4043640.jpg
2026-06-06T22:11:36.571742840Z TRACE 2026-06-06T18:11:36.571 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.571886965Z DEBUG 2026-06-06T18:11:36.571 HttpConnectionHandler (0x565295dbfdd0): received request
2026-06-06T22:11:36.571907767Z TRACE 2026-06-06T18:11:36.571 RequestMapper: path= /v2/library/1/cover/341bc4710a62425381a457fb3ab6c5312bae36605386161.jpg
2026-06-06T22:11:36.571909541Z TRACE 2026-06-06T18:11:36.571 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.572316236Z DEBUG 2026-06-06T18:11:36.572 HttpConnectionHandler (0x565295db3290): received request
2026-06-06T22:11:36.572320107Z TRACE 2026-06-06T18:11:36.572 RequestMapper: path= /v2/library/1/cover/4fd86dba45d2d4f81221f9e6e0a4e731f0642ee45397765.jpg
2026-06-06T22:11:36.572321745Z TRACE 2026-06-06T18:11:36.572 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.572584174Z DEBUG 2026-06-06T18:11:36.572 HttpConnectionHandler (0x565295dc1fc0): finished request
2026-06-06T22:11:36.572587177Z DEBUG 2026-06-06T18:11:36.572 HttpConnectionHandler (0x565295dbfdd0): finished request
2026-06-06T22:11:36.572592946Z DEBUG 2026-06-06T18:11:36.572 HttpConnectionHandler (0x565295dbd230): received request
2026-06-06T22:11:36.572594771Z TRACE 2026-06-06T18:11:36.572 RequestMapper: path= /v2/library/1/cover/e97392676cbc37af040ca89fa3217588386fdca65515507.jpg
2026-06-06T22:11:36.572596093Z TRACE 2026-06-06T18:11:36.572 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.572597624Z DEBUG 2026-06-06T18:11:36.572 HttpConnectionHandler (0x565295db3290): finished request
2026-06-06T22:11:36.572684485Z DEBUG 2026-06-06T18:11:36.572 HttpConnectionHandler (0x565295dbd230): finished request
2026-06-06T22:11:36.579890529Z DEBUG 2026-06-06T18:11:36.579 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/49dd979f4ec8dd441f24efcae60278921445cc618254672.jpg HTTP/1.1
2026-06-06T22:11:36.580738478Z DEBUG 2026-06-06T18:11:36.580 HttpConnectionHandler (0x565295dac4c0): received request
2026-06-06T22:11:36.580743525Z TRACE 2026-06-06T18:11:36.580 RequestMapper: path= /v2/library/1/cover/49dd979f4ec8dd441f24efcae60278921445cc618254672.jpg
2026-06-06T22:11:36.580747242Z TRACE 2026-06-06T18:11:36.580 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.580992143Z DEBUG 2026-06-06T18:11:36.580 HttpConnectionHandler (0x565295dac4c0): finished request
2026-06-06T22:11:36.993297362Z DEBUG 2026-06-06T18:11:36.992 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/7f0903d47247f19deba08286a7330dc9df524e018643478.jpg HTTP/1.1
2026-06-06T22:11:36.993718948Z DEBUG 2026-06-06T18:11:36.992 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/01d2f358a1763ba98f7aad3a42fda801bfd9814c5500601.jpg HTTP/1.1
2026-06-06T22:11:36.993749101Z DEBUG 2026-06-06T18:11:36.993 HttpConnectionHandler (0x565295dad760): received request
2026-06-06T22:11:36.993756047Z TRACE 2026-06-06T18:11:36.993 RequestMapper: path= /v2/library/1/cover/7f0903d47247f19deba08286a7330dc9df524e018643478.jpg
2026-06-06T22:11:36.993761635Z TRACE 2026-06-06T18:11:36.993 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.993943410Z DEBUG 2026-06-06T18:11:36.993 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/beed19eaf560b1d996d1628338eb72d3c90635d174353133.jpg HTTP/1.1
2026-06-06T22:11:36.993968995Z DEBUG 2026-06-06T18:11:36.993 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/569eeae8de4a5091de42ac3390d5cedbf1c025fd9310259.jpg HTTP/1.1
2026-06-06T22:11:36.994103198Z DEBUG 2026-06-06T18:11:36.993 HttpRequest: from ::ffff:10.0.0.21: GET /v2/library/1/cover/3ae9eca06aafa0ab0f0178ecf246560184d8dda05350341.jpg HTTP/1.1
2026-06-06T22:11:36.994526865Z DEBUG 2026-06-06T18:11:36.994 HttpConnectionHandler (0x565295dac4c0): received request
2026-06-06T22:11:36.994529277Z TRACE 2026-06-06T18:11:36.994 RequestMapper: path= /v2/library/1/cover/3ae9eca06aafa0ab0f0178ecf246560184d8dda05350341.jpg
2026-06-06T22:11:36.994530733Z TRACE 2026-06-06T18:11:36.994 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.994874332Z DEBUG 2026-06-06T18:11:36.994 HttpConnectionHandler (0x565295dad760): finished request
2026-06-06T22:11:36.995282192Z DEBUG 2026-06-06T18:11:36.994 HttpConnectionHandler (0x565295dac4c0): finished request
2026-06-06T22:11:36.996150379Z DEBUG 2026-06-06T18:11:36.995 HttpConnectionHandler (0x565295db3290): received request
2026-06-06T22:11:36.996186343Z TRACE 2026-06-06T18:11:36.995 RequestMapper: path= /v2/library/1/cover/569eeae8de4a5091de42ac3390d5cedbf1c025fd9310259.jpg
2026-06-06T22:11:36.996192925Z TRACE 2026-06-06T18:11:36.995 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.996197749Z DEBUG 2026-06-06T18:11:36.995 HttpConnectionHandler (0x565295dc1fc0): received request
2026-06-06T22:11:36.996202015Z TRACE 2026-06-06T18:11:36.995 RequestMapper: path= /v2/library/1/cover/01d2f358a1763ba98f7aad3a42fda801bfd9814c5500601.jpg
2026-06-06T22:11:36.996206885Z TRACE 2026-06-06T18:11:36.995 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.996309251Z DEBUG 2026-06-06T18:11:36.996 HttpConnectionHandler (0x565295dbfdd0): received request
2026-06-06T22:11:36.996324630Z TRACE 2026-06-06T18:11:36.996 RequestMapper: path= /v2/library/1/cover/beed19eaf560b1d996d1628338eb72d3c90635d174353133.jpg
2026-06-06T22:11:36.996330336Z TRACE 2026-06-06T18:11:36.996 X-Request-Id: "17B8A8A4-6BCD-4B90-B967-0D1A3C4742A9"
2026-06-06T22:11:36.996462775Z DEBUG 2026-06-06T18:11:36.996 HttpConnectionHandler (0x565295db3290): finished request
2026-06-06T22:11:36.996476216Z DEBUG 2026-06-06T18:11:36.996 HttpConnectionHandler (0x565295dbfdd0): finished request
2026-06-06T22:11:36.996788557Z DEBUG 2026-06-06T18:11:36.996 HttpConnectionHandler (0x565295dc1fc0): finished request
2026-06-06T22:11:46.437992859Z DEBUG 2026-06-06T18:11:46.437 HttpConnectionHandler (0x565295dbd230): read timeout occured
2026-06-06T22:11:46.438018106Z DEBUG 2026-06-06T18:11:46.437 HttpConnectionHandler (0x565295db0900): read timeout occured
2026-06-06T22:11:46.438021383Z DEBUG 2026-06-06T18:11:46.437 HttpConnectionHandler (0x565295dbd230): disconnected
2026-06-06T22:11:46.438023496Z DEBUG 2026-06-06T18:11:46.437 HttpConnectionHandler (0x565295db0900): disconnected
2026-06-06T22:11:47.435602784Z DEBUG 2026-06-06T18:11:47.435 HttpConnectionHandler (0x565295db3290): read timeout occured
2026-06-06T22:11:47.435624741Z DEBUG 2026-06-06T18:11:47.435 HttpConnectionHandler (0x565295dad760): read timeout occured
2026-06-06T22:11:47.435627549Z DEBUG 2026-06-06T18:11:47.435 HttpConnectionHandler (0x565295db3290): disconnected
2026-06-06T22:11:47.435629611Z DEBUG 2026-06-06T18:11:47.435 HttpConnectionHandler (0x565295dad760): disconnected
2026-06-06T22:11:47.438148319Z DEBUG 2026-06-06T18:11:47.437 HttpConnectionHandler (0x565295dbfdd0): read timeout occured
2026-06-06T22:11:47.438157028Z DEBUG 2026-06-06T18:11:47.438 HttpConnectionHandler (0x565295dc1fc0): read timeout occured
2026-06-06T22:11:47.438162629Z DEBUG 2026-06-06T18:11:47.438 HttpConnectionHandler (0x565295dbfdd0): disconnected
2026-06-06T22:11:47.438164465Z DEBUG 2026-06-06T18:11:47.438 HttpConnectionHandler (0x565295dc1fc0): disconnected
2026-06-06T22:11:47.438511875Z DEBUG 2026-06-06T18:11:47.438 HttpConnectionHandler (0x565295dac4c0): read timeout occured
2026-06-06T22:11:47.438533998Z DEBUG 2026-06-06T18:11:47.438 HttpConnectionHandler (0x565295dac4c0): disconnected
2026-06-06T22:13:02.807440107Z DEBUG 2026-06-06T18:13:02.807 HttpConnectionHandler (0x565295db0900): handle new connection
2026-06-06T22:13:02.812004380Z DEBUG 2026-06-06T18:13:02.811 HttpRequest: from ::ffff:10.0.0.21: POST /v2/sync HTTP/1.1
2026-06-06T22:13:02.812975547Z DEBUG 2026-06-06T18:13:02.812 HttpConnectionHandler (0x565295db0900): received request
2026-06-06T22:13:02.813013905Z TRACE 2026-06-06T18:13:02.812 RequestMapper: path= /v2/sync
2026-06-06T22:13:02.813019858Z TRACE 2026-06-06T18:13:02.812 X-Request-Id: ""
2026-06-06T22:13:02.813129588Z TRACE 2026-06-06T18:13:02.812 POST DATA: ""
2026-06-06T22:13:02.813190735Z DEBUG 2026-06-06T18:13:02.812 HttpConnectionHandler (0x565295db0900): finished request
2026-06-06T22:13:12.437903943Z DEBUG 2026-06-06T18:13:12.437 HttpConnectionHandler (0x565295db0900): read timeout occured
2026-06-06T22:13:12.437934413Z DEBUG 2026-06-06T18:13:12.437 HttpConnectionHandler (0x565295db0900): disconnected
2026-06-06T22:13:31.546070129Z DEBUG 2026-06-06T18:13:31.545 HttpConnectionHandler (0x565295db0900): handle new connection
2026-06-06T22:13:31.546449651Z DEBUG 2026-06-06T18:13:31.546 HttpRequest: from ::ffff:10.0.0.21: POST /v2/sync HTTP/1.1
2026-06-06T22:13:31.547308976Z DEBUG 2026-06-06T18:13:31.547 HttpConnectionHandler (0x565295db0900): received request
2026-06-06T22:13:31.547351848Z TRACE 2026-06-06T18:13:31.547 RequestMapper: path= /v2/sync
2026-06-06T22:13:31.547380937Z TRACE 2026-06-06T18:13:31.547 X-Request-Id: ""
2026-06-06T22:13:31.547633355Z TRACE 2026-06-06T18:13:31.547 POST DATA: ""
2026-06-06T22:13:31.547646592Z DEBUG 2026-06-06T18:13:31.547 HttpConnectionHandler (0x565295db0900): finished request
2026-06-06T22:13:41.435917919Z DEBUG 2026-06-06T18:13:41.435 HttpConnectionHandler (0x565295db0900): read timeout occured
2026-06-06T22:13:41.435944280Z DEBUG 2026-06-06T18:13:41.435 HttpConnectionHandler (0x565295db0900): disconnected

example spot checks in the cover directory from images in the log file

/volume1/comics/.yacreaderlibrary/covers$ ls -la beed19eaf560b1d996d1628338eb72d3c90635d174353133.jpg
ls: cannot access 'beed19eaf560b1d996d1628338eb72d3c90635d174353133.jpg': No such file or directory

/volume1/comics/.yacreaderlibrary/covers$ ls -la 01d2f358a1763ba98f7aad3a42fda801bfd9814c5500601.jpg
ls: cannot access '01d2f358a1763ba98f7aad3a42fda801bfd9814c5500601.jpg': No such file or directory

If the covers are not there an option is to recreate the library.

Steps:

1) create a backup of the whole .yacreaderlibrary folder so you don't lose anything. Like moving it to .yacreaderlibrary.bak
2) create a new library
3) copy library.ydb from .yacreaderlibrary.bak into the new .yacreaderlibrary.

That worked! Thank you for the fix.

For anyone reading this and thinking about setting the log level, here is the command I used to turn on trace logging. I connected to the terminal of my running docker container and did this