Seafile cli with zfs sync state transition from committing to 'error': 'Error when indexing'

Hi our specs:

Ubuntu 18.04 LTS latest patch
ZFS 0.8.5 with 2 HDD as Soft Raid Mirror
latest Version of Seaf-Cli Client

Seafile Server is a Pro Version / latest 7 running on Ubuntu also

Issue:
One library always starts to report an indexing error.

Changed / Tested:
Open Files Descriptor adjusted - there are ‘only’ 333.834 files
Complete new download LIB from Server (suggested by support)
FSCK and LIB check on Server before new download

[01/25/21 11:58:20] sync-mgr.c(582): Repo ‘03_KUNDEN_AKTIVE_PROJEKTE’ sync state transition from ‘committing’ to ‘uploading’.
[01/25/21 11:58:20] http-tx-mgr.c(1157): Transfer repo ‘fd73ed9f’: (‘normal’, ‘init’) --> (‘normal’, ‘check’)
[01/25/21 11:58:21] http-tx-mgr.c(1157): Transfer repo ‘fd73ed9f’: (‘normal’, ‘check’) --> (‘normal’, ‘commit’)
[01/25/21 11:58:21] http-tx-mgr.c(1157): Transfer repo ‘fd73ed9f’: (‘normal’, ‘commit’) --> (‘normal’, ‘fs’)
[01/25/21 11:58:21] http-tx-mgr.c(1157): Transfer repo ‘fd73ed9f’: (‘normal’, ‘fs’) --> (‘normal’, ‘data’)
[01/25/21 11:58:38] http-tx-mgr.c(1157): Transfer repo ‘fd73ed9f’: (‘normal’, ‘data’) --> (‘normal’, ‘update-branch’)
[01/25/21 11:58:38] http-tx-mgr.c(1157): Transfer repo ‘fd73ed9f’: (‘normal’, ‘update-branch’) --> (‘finished’, ‘finished’)
[01/25/21 11:58:39] sync-mgr.c(582): Repo ‘03_KUNDEN_AKTIVE_PROJEKTE’ sync state transition from ‘uploading’ to ‘initializing’.
[01/25/21 11:58:39] sync-mgr.c(881): Removing blocks for repo 03_KUNDEN_AKTIVE_PROJEKTE(fd73ed9f).
[01/25/21 11:58:47] sync-mgr.c(582): Repo ‘03_KUNDEN_AKTIVE_PROJEKTE’ sync state transition from ‘synchronized’ to ‘committing’.
[01/25/21 11:58:47] unable to map index file
[01/25/21 11:58:48] repo-mgr.c(4008): Failed to load index.
[01/25/21 11:58:48] sync-mgr.c(962): [Sync mgr] Failed to commit to repo 03_KUNDEN_AKTIVE_PROJEKTE(fd73ed9f).
[01/25/21 11:58:48] sync-mgr.c(621): Repo ‘03_KUNDEN_AKTIVE_PROJEKTE’ sync state transition from committing to ‘error’: ‘Error when indexing’.

After this the complete client crashs and come only back after a restart of the seaf-cli service.

Do you have any ideas what we can do / check / change?
We would be very grateful for any suggestion.

kind regards,

CAT

Did u try to create a new library and transfer/copy all files to it? This can be done completely in the WebUI without the need to download all files.
Simply rename the library to the desired name after transfering and deleting the old lib.
You will loose file history this way though. And if course sharing information etc.

Maybe this is totally unrelated to the library. Die you try to download the lib via a desktop client on another system?